SYMBOLCOMMON_NAMEaka. SYNONYMS
win.silence (Back to overview)

Silence

aka: TrueBot

Actor(s): Silence group


There is no description at this point.

References
2020-06-22CERT-FRCERT-FR
@techreport{certfr:20200622:volution:fba1cfa, author = {CERT-FR}, title = {{Évolution De Lactivité du Groupe Cybercriminel TA505}}, date = {2020-06-22}, institution = {CERT-FR}, url = {https://www.cert.ssi.gouv.fr/uploads/CERTFR-2020-CTI-006.pdf}, language = {French}, urldate = {2020-06-24} } Évolution De Lactivité du Groupe Cybercriminel TA505
Amadey AndroMut Bart Clop Dridex FlawedGrace Gandcrab Get2 GlobeImposter Jaff Locky Marap Philadephia Ransom QuantLoader Scarab Ransomware SDBbot ServHelper Silence tRat TrickBot
2020-04-23CERT-FRCERT-FR
@techreport{certfr:20200423:le:4dbca96, author = {CERT-FR}, title = {{LE GROUPE CYBERCRIMINEL SILENCE}}, date = {2020-04-23}, institution = {CERT-FR}, url = {https://www.cert.ssi.gouv.fr/uploads/CERTFR-2020-CTI-004.pdf}, language = {French}, urldate = {2020-05-07} } LE GROUPE CYBERCRIMINEL SILENCE
Silence
2020-03-26TelekomThomas Barabosch
@online{barabosch:20200326:ta505s:24d9805, author = {Thomas Barabosch}, title = {{TA505's Box of Chocolate - On Hidden Gems packed with the TA505 Packer}}, date = {2020-03-26}, organization = {Telekom}, url = {https://www.telekom.com/en/blog/group/article/cybersecurity-ta505-s-box-of-chocolate-597672}, language = {English}, urldate = {2020-03-27} } TA505's Box of Chocolate - On Hidden Gems packed with the TA505 Packer
Amadey Azorult Clop FlawedGrace Get2 SDBbot Silence TinyMet TA505
2020-01-13Github (Tera0017)Tera0017
@online{tera0017:20200113:tafof:d939bc6, author = {Tera0017}, title = {{TAFOF Unpacker}}, date = {2020-01-13}, organization = {Github (Tera0017)}, url = {https://github.com/Tera0017/TAFOF-Unpacker}, language = {English}, urldate = {2020-03-30} } TAFOF Unpacker
Clop Get2 Silence
2019-08Group-IBGroup-IB
@online{groupib:201908:attacks:9da5611, author = {Group-IB}, title = {{Attacks by Silence}}, date = {2019-08}, organization = {Group-IB}, url = {https://www.group-ib.com/resources/threat-research/silence.html}, language = {English}, urldate = {2020-01-07} } Attacks by Silence
Silence DDoS Kikothac Silence
2019-08Group-IBGroup-IB
@techreport{groupib:201908:silence:1845381, author = {Group-IB}, title = {{Silence 2.0 - Going Global}}, date = {2019-08}, institution = {Group-IB}, url = {https://www.group-ib.com/resources/threat-research/silence_2.0.going_global.pdf}, language = {English}, urldate = {2019-12-17} } Silence 2.0 - Going Global
Silence
2019-02-11One Night in NorfolkKevin Perlow
@online{perlow:20190211:how:05b5d9a, author = {Kevin Perlow}, title = {{How the Silence Downloader Has Evolved Over Time}}, date = {2019-02-11}, organization = {One Night in Norfolk}, url = {https://norfolkinfosec.com/how-the-silence-downloader-has-evolved-over-time/}, language = {English}, urldate = {2020-05-19} } How the Silence Downloader Has Evolved Over Time
Silence
2019-02-06One Night in NorfolkKevin Perlow
@online{perlow:20190206:some:8835f31, author = {Kevin Perlow}, title = {{Some Notes on the Silence Proxy}}, date = {2019-02-06}, organization = {One Night in Norfolk}, url = {https://norfolkinfosec.com/some-notes-on-the-silence-proxy/}, language = {English}, urldate = {2020-05-19} } Some Notes on the Silence Proxy
Silence
2019-01-24ReaqtaReaqta
@online{reaqta:20190124:silence:08baddd, author = {Reaqta}, title = {{Silence group targeting Russian Banks via Malicious CHM}}, date = {2019-01-24}, organization = {Reaqta}, url = {https://reaqta.com/2019/01/silence-group-targeting-russian-banks/}, language = {English}, urldate = {2019-11-28} } Silence group targeting Russian Banks via Malicious CHM
Silence Silence group
2017-11-01IntezerJay Rosenberg
@online{rosenberg:20171101:silence:087cfb3, author = {Jay Rosenberg}, title = {{Silence of the Moles}}, date = {2017-11-01}, organization = {Intezer}, url = {http://www.intezer.com/silenceofthemoles/}, language = {English}, urldate = {2019-11-27} } Silence of the Moles
Silence
2017-11-01Kaspersky LabsGReAT
@online{great:20171101:silence:b22eae0, author = {GReAT}, title = {{Silence – a new Trojan attacking financial organizations}}, date = {2017-11-01}, organization = {Kaspersky Labs}, url = {https://securelist.com/the-silence/83009/}, language = {English}, urldate = {2019-12-20} } Silence – a new Trojan attacking financial organizations
Silence Silence group
Yara Rules
[TLP:WHITE] win_silence_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_silence_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.silence"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 8a4801 40 84c9 75f4 eb05 803800 }
            // n = 6, score = 1000
            //   8a4801               | mov                 cl, byte ptr [eax + 1]
            //   40                   | inc                 eax
            //   84c9                 | test                cl, cl
            //   75f4                 | jne                 0xfffffff6
            //   eb05                 | jmp                 7
            //   803800               | cmp                 byte ptr [eax], 0

        $sequence_1 = { 8d45fc 50 6a00 6a00 68???????? c745fc00000000 }
            // n = 6, score = 1000
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0

        $sequence_2 = { 8d95f0fdffff 52 ff10 8b95ecfdffff 03fa 8bb5e8fdffff 3bf7 }
            // n = 7, score = 900
            //   8d95f0fdffff         | lea                 edx, [ebp - 0x210]
            //   52                   | push                edx
            //   ff10                 | call                dword ptr [eax]
            //   8b95ecfdffff         | mov                 edx, dword ptr [ebp - 0x214]
            //   03fa                 | add                 edi, edx
            //   8bb5e8fdffff         | mov                 esi, dword ptr [ebp - 0x218]
            //   3bf7                 | cmp                 esi, edi

        $sequence_3 = { 8b17 8bcf ff5210 8b17 8bcf }
            // n = 5, score = 900
            //   8b17                 | mov                 edx, dword ptr [edi]
            //   8bcf                 | mov                 ecx, edi
            //   ff5210               | call                dword ptr [edx + 0x10]
            //   8b17                 | mov                 edx, dword ptr [edi]
            //   8bcf                 | mov                 ecx, edi

        $sequence_4 = { e8???????? ff37 8b35???????? ffd6 }
            // n = 4, score = 900
            //   e8????????           |                     
            //   ff37                 | push                dword ptr [edi]
            //   8b35????????         |                     
            //   ffd6                 | call                esi

        $sequence_5 = { e8???????? cc 8325????????00 c3 6a08 68???????? }
            // n = 6, score = 900
            //   e8????????           |                     
            //   cc                   | int3                
            //   8325????????00       |                     
            //   c3                   | ret                 
            //   6a08                 | push                8
            //   68????????           |                     

        $sequence_6 = { 51 ffb5f0fbffff 8bcb ff5038 85c0 }
            // n = 5, score = 900
            //   51                   | push                ecx
            //   ffb5f0fbffff         | push                dword ptr [ebp - 0x410]
            //   8bcb                 | mov                 ecx, ebx
            //   ff5038               | call                dword ptr [eax + 0x38]
            //   85c0                 | test                eax, eax

        $sequence_7 = { e8???????? 83c41c 895ef8 897ef0 5b }
            // n = 5, score = 900
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   895ef8               | mov                 dword ptr [esi - 8], ebx
            //   897ef0               | mov                 dword ptr [esi - 0x10], edi
            //   5b                   | pop                 ebx

        $sequence_8 = { 7412 8b01 52 8d95f0fdffff 52 }
            // n = 5, score = 900
            //   7412                 | je                  0x14
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   52                   | push                edx
            //   8d95f0fdffff         | lea                 edx, [ebp - 0x210]
            //   52                   | push                edx

        $sequence_9 = { 50 683f020f00 6a00 68???????? 6801000080 ff15???????? 68???????? }
            // n = 7, score = 900
            //   50                   | push                eax
            //   683f020f00           | push                0xf023f
            //   6a00                 | push                0
            //   68????????           |                     
            //   6801000080           | push                0x80000001
            //   ff15????????         |                     
            //   68????????           |                     

        $sequence_10 = { ff7704 ffd6 ff770c ffd6 ff7708 }
            // n = 5, score = 900
            //   ff7704               | push                dword ptr [edi + 4]
            //   ffd6                 | call                esi
            //   ff770c               | push                dword ptr [edi + 0xc]
            //   ffd6                 | call                esi
            //   ff7708               | push                dword ptr [edi + 8]

        $sequence_11 = { 8b01 ff5004 8b46f8 0346f4 57 ff7508 }
            // n = 6, score = 900
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   ff5004               | call                dword ptr [eax + 4]
            //   8b46f8               | mov                 eax, dword ptr [esi - 8]
            //   0346f4               | add                 eax, dword ptr [esi - 0xc]
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_12 = { ff15???????? 6a00 6800000004 6a00 6a00 }
            // n = 5, score = 900
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6800000004           | push                0x4000000
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_13 = { 8bd8 68???????? 53 ff15???????? 6a00 6a00 6a00 }
            // n = 7, score = 800
            //   8bd8                 | mov                 ebx, eax
            //   68????????           |                     
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_14 = { 5e 5b 5d c3 c60200 42 }
            // n = 6, score = 800
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   c60200               | mov                 byte ptr [edx], 0
            //   42                   | inc                 edx

        $sequence_15 = { 3acb 740a 8a4801 40 }
            // n = 4, score = 800
            //   3acb                 | cmp                 cl, bl
            //   740a                 | je                  0xc
            //   8a4801               | mov                 cl, byte ptr [eax + 1]
            //   40                   | inc                 eax

        $sequence_16 = { ff30 c745fc00000000 57 ff15???????? }
            // n = 4, score = 800
            //   ff30                 | push                dword ptr [eax]
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   57                   | push                edi
            //   ff15????????         |                     

        $sequence_17 = { f3c3 e9???????? e8???????? e9???????? 6a14 }
            // n = 5, score = 800
            //   f3c3                 | ret                 
            //   e9????????           |                     
            //   e8????????           |                     
            //   e9????????           |                     
            //   6a14                 | push                0x14

        $sequence_18 = { 6801000080 ff15???????? 56 8d85f8feffff }
            // n = 4, score = 800
            //   6801000080           | push                0x80000001
            //   ff15????????         |                     
            //   56                   | push                esi
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]

        $sequence_19 = { 68???????? ffd6 8b45fc 85c0 }
            // n = 4, score = 800
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   85c0                 | test                eax, eax

        $sequence_20 = { 46 56 8d85f8feffff 50 6a01 }
            // n = 5, score = 800
            //   46                   | inc                 esi
            //   56                   | push                esi
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   6a01                 | push                1

        $sequence_21 = { 803800 7408 8a5a01 42 84db }
            // n = 5, score = 800
            //   803800               | cmp                 byte ptr [eax], 0
            //   7408                 | je                  0xa
            //   8a5a01               | mov                 bl, byte ptr [edx + 1]
            //   42                   | inc                 edx
            //   84db                 | test                bl, bl

        $sequence_22 = { 6a00 57 ff15???????? 8d45fc 50 }
            // n = 5, score = 800
            //   6a00                 | push                0
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax

        $sequence_23 = { 84c9 75f4 eb0d 803800 }
            // n = 4, score = 800
            //   84c9                 | test                cl, cl
            //   75f4                 | jne                 0xfffffff6
            //   eb0d                 | jmp                 0xf
            //   803800               | cmp                 byte ptr [eax], 0

        $sequence_24 = { 8d85bcf7ffff 50 56 ff15???????? }
            // n = 4, score = 600
            //   8d85bcf7ffff         | lea                 eax, [ebp - 0x844]
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_25 = { ff15???????? 8d85b8f7ffff 50 6800080000 8d85bcf7ffff }
            // n = 5, score = 600
            //   ff15????????         |                     
            //   8d85b8f7ffff         | lea                 eax, [ebp - 0x848]
            //   50                   | push                eax
            //   6800080000           | push                0x800
            //   8d85bcf7ffff         | lea                 eax, [ebp - 0x844]

        $sequence_26 = { 8d45f0 50 b901000000 ba04000000 }
            // n = 4, score = 300
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   b901000000           | mov                 ecx, 1
            //   ba04000000           | mov                 edx, 4

        $sequence_27 = { 8bec ff4d08 755d 833d????????04 7554 }
            // n = 5, score = 300
            //   8bec                 | mov                 ebp, esp
            //   ff4d08               | dec                 dword ptr [ebp + 8]
            //   755d                 | jne                 0x5f
            //   833d????????04       |                     
            //   7554                 | jne                 0x56

        $sequence_28 = { 31db 89c1 dd4508 d88b74914100 83ec08 df3c24 9b }
            // n = 7, score = 300
            //   31db                 | xor                 ebx, ebx
            //   89c1                 | mov                 ecx, eax
            //   dd4508               | fld                 qword ptr [ebp + 8]
            //   d88b74914100         | fmul                dword ptr [ebx + 0x419174]
            //   83ec08               | sub                 esp, 8
            //   df3c24               | fistp               qword ptr [esp]
            //   9b                   | wait                

        $sequence_29 = { 8d55f0 8b400c 8b00 e8???????? 33c0 }
            // n = 5, score = 300
            //   8d55f0               | lea                 edx, [ebp - 0x10]
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax

        $sequence_30 = { c705????????04000000 ff15???????? 85c0 750b 68???????? ff15???????? }
            // n = 6, score = 300
            //   c705????????04000000     |     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750b                 | jne                 0xd
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_31 = { ff15???????? 68c0d40100 ff15???????? e9???????? }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   68c0d40100           | push                0x1d4c0
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_32 = { 83ef05 7c29 47 8db504fcffff 8d85bcf7ffff }
            // n = 5, score = 300
            //   83ef05               | sub                 edi, 5
            //   7c29                 | jl                  0x2b
            //   47                   | inc                 edi
            //   8db504fcffff         | lea                 esi, [ebp - 0x3fc]
            //   8d85bcf7ffff         | lea                 eax, [ebp - 0x844]

        $sequence_33 = { 5a e8???????? 84c0 740c e8???????? }
            // n = 5, score = 300
            //   5a                   | pop                 edx
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   740c                 | je                  0xe
            //   e8????????           |                     

        $sequence_34 = { 8b8e00000001 8b44d604 03c9 8944ce08 8b8600000001 8944d604 }
            // n = 6, score = 300
            //   8b8e00000001         | mov                 ecx, dword ptr [esi + 0x1000000]
            //   8b44d604             | mov                 eax, dword ptr [esi + edx*8 + 4]
            //   03c9                 | add                 ecx, ecx
            //   8944ce08             | mov                 dword ptr [esi + ecx*8 + 8], eax
            //   8b8600000001         | mov                 eax, dword ptr [esi + 0x1000000]
            //   8944d604             | mov                 dword ptr [esi + edx*8 + 4], eax

        $sequence_35 = { 53 8b1d???????? 57 0f57c0 }
            // n = 4, score = 300
            //   53                   | push                ebx
            //   8b1d????????         |                     
            //   57                   | push                edi
            //   0f57c0               | xorps               xmm0, xmm0

        $sequence_36 = { ff15???????? 33d2 55 68???????? 64ff32 648922 }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   33d2                 | xor                 edx, edx
            //   55                   | push                ebp
            //   68????????           |                     
            //   64ff32               | push                dword ptr fs:[edx]
            //   648922               | mov                 dword ptr fs:[edx], esp

        $sequence_37 = { 68???????? 68???????? ff15???????? a3???????? 85c0 750e 68???????? }
            // n = 7, score = 300
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   a3????????           |                     
            //   85c0                 | test                eax, eax
            //   750e                 | jne                 0x10
            //   68????????           |                     

        $sequence_38 = { c705????????02000000 c705????????00000000 c705????????00000000 c705????????00000000 ffd3 8b3d???????? }
            // n = 6, score = 300
            //   c705????????02000000     |     
            //   c705????????00000000     |     
            //   c705????????00000000     |     
            //   c705????????00000000     |     
            //   ffd3                 | call                ebx
            //   8b3d????????         |                     

        $sequence_39 = { 75f1 83fb06 7f15 8b0cdd1c924100 b201 }
            // n = 5, score = 300
            //   75f1                 | jne                 0xfffffff3
            //   83fb06               | cmp                 ebx, 6
            //   7f15                 | jg                  0x17
            //   8b0cdd1c924100       | mov                 ecx, dword ptr [ebx*8 + 0x41921c]
            //   b201                 | mov                 dl, 1

        $sequence_40 = { ffd3 8b3d???????? 85c0 7507 68???????? ffd7 6a00 }
            // n = 7, score = 300
            //   ffd3                 | call                ebx
            //   8b3d????????         |                     
            //   85c0                 | test                eax, eax
            //   7507                 | jne                 9
            //   68????????           |                     
            //   ffd7                 | call                edi
            //   6a00                 | push                0

        $sequence_41 = { 6a07 33c9 8b5340 8d85ccfbffff }
            // n = 4, score = 300
            //   6a07                 | push                7
            //   33c9                 | xor                 ecx, ecx
            //   8b5340               | mov                 edx, dword ptr [ebx + 0x40]
            //   8d85ccfbffff         | lea                 eax, [ebp - 0x434]

        $sequence_42 = { 750e 68???????? ff15???????? c20800 53 8b1d???????? }
            // n = 6, score = 300
            //   750e                 | jne                 0x10
            //   68????????           |                     
            //   ff15????????         |                     
            //   c20800               | ret                 8
            //   53                   | push                ebx
            //   8b1d????????         |                     

        $sequence_43 = { 50 6a00 ff15???????? 6a00 6a00 68???????? ff15???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_44 = { b801000000 668945f2 eb06 33c9 66894df2 668b55f2 }
            // n = 6, score = 100
            //   b801000000           | mov                 eax, 1
            //   668945f2             | mov                 word ptr [ebp - 0xe], ax
            //   eb06                 | jmp                 8
            //   33c9                 | xor                 ecx, ecx
            //   66894df2             | mov                 word ptr [ebp - 0xe], cx
            //   668b55f2             | mov                 dx, word ptr [ebp - 0xe]

        $sequence_45 = { 8b55e8 3b15???????? 740c c78544ffffff01000000 eb0a }
            // n = 5, score = 100
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   3b15????????         |                     
            //   740c                 | je                  0xe
            //   c78544ffffff01000000     | mov    dword ptr [ebp - 0xbc], 1
            //   eb0a                 | jmp                 0xc

        $sequence_46 = { 3b55e8 0f850d030000 0fbf05???????? 85c0 0f84fe020000 }
            // n = 5, score = 100
            //   3b55e8               | cmp                 edx, dword ptr [ebp - 0x18]
            //   0f850d030000         | jne                 0x313
            //   0fbf05????????       |                     
            //   85c0                 | test                eax, eax
            //   0f84fe020000         | je                  0x304

        $sequence_47 = { a1???????? 0faf45f4 33d2 b950000000 }
            // n = 4, score = 100
            //   a1????????           |                     
            //   0faf45f4             | imul                eax, dword ptr [ebp - 0xc]
            //   33d2                 | xor                 edx, edx
            //   b950000000           | mov                 ecx, 0x50

        $sequence_48 = { eb0a c78548ffffff01000000 a1???????? 338548ffffff a3???????? }
            // n = 5, score = 100
            //   eb0a                 | jmp                 0xc
            //   c78548ffffff01000000     | mov    dword ptr [ebp - 0xb8], 1
            //   a1????????           |                     
            //   338548ffffff         | xor                 eax, dword ptr [ebp - 0xb8]
            //   a3????????           |                     

    condition:
        7 of them and filesize < 70128640
}
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