SYMBOLCOMMON_NAMEaka. SYNONYMS
win.smac (Back to overview)

smac

aka: speccom

There is no description at this point.

References
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:fcb04ab, author = {SecureWorks}, title = {{BRONZE EXPRESS}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-express}, language = {English}, urldate = {2020-05-23} } BRONZE EXPRESS
9002 RAT CHINACHOPPER IsSpace NewCT PlugX smac APT 26
2015-08-10shadowserverNed Moran, Ben Koehl
@techreport{moran:20150810:italian:26b33c4, author = {Ned Moran and Ben Koehl}, title = {{The Italian Connection: An analysis of exploit supply chains and digital quartermasters}}, date = {2015-08-10}, institution = {shadowserver}, url = {https://paper.seebug.org/papers/APT/APT_CyberCriminal_Campagin/2015/Aug.10.The_Italian_Connection_An_analysis_of_exploit_supply_chains_and_digital_quartermasters/HTExploitTelemetry.pdf}, language = {English}, urldate = {2020-01-07} } The Italian Connection: An analysis of exploit supply chains and digital quartermasters
smac Violin Panda
Yara Rules
[TLP:WHITE] win_smac_auto (20210616 | Detects win.smac.)
rule win_smac_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.smac."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.smac"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 8bc1 66894590 58 8bf8 6a2d 66897d92 }
            // n = 6, score = 200
            //   8bc1                 | mov                 eax, ecx
            //   66894590             | mov                 word ptr [ebp - 0x70], ax
            //   58                   | pop                 eax
            //   8bf8                 | mov                 edi, eax
            //   6a2d                 | push                0x2d
            //   66897d92             | mov                 word ptr [ebp - 0x6e], di

        $sequence_1 = { 8bc7 8d1458 397518 7645 837d1c08 8b4508 }
            // n = 6, score = 200
            //   8bc7                 | mov                 eax, edi
            //   8d1458               | lea                 edx, dword ptr [eax + ebx*2]
            //   397518               | cmp                 dword ptr [ebp + 0x18], esi
            //   7645                 | jbe                 0x47
            //   837d1c08             | cmp                 dword ptr [ebp + 0x1c], 8
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_2 = { 5e e8???????? c9 c3 33f6 ebe0 6888010000 }
            // n = 7, score = 200
            //   5e                   | pop                 esi
            //   e8????????           |                     
            //   c9                   | leave               
            //   c3                   | ret                 
            //   33f6                 | xor                 esi, esi
            //   ebe0                 | jmp                 0xffffffe2
            //   6888010000           | push                0x188

        $sequence_3 = { ffb520ffffff ff15???????? 85c0 780c ffb520ffffff ff15???????? }
            // n = 6, score = 200
            //   ffb520ffffff         | push                dword ptr [ebp - 0xe0]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   780c                 | js                  0xe
            //   ffb520ffffff         | push                dword ptr [ebp - 0xe0]
            //   ff15????????         |                     

        $sequence_4 = { 8b442420 c684245801000019 e8???????? 8db424a0000000 e9???????? 83ec1c }
            // n = 6, score = 200
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   c684245801000019     | mov                 byte ptr [esp + 0x158], 0x19
            //   e8????????           |                     
            //   8db424a0000000       | lea                 esi, dword ptr [esp + 0xa0]
            //   e9????????           |                     
            //   83ec1c               | sub                 esp, 0x1c

        $sequence_5 = { e8???????? 6a08 58 ff7508 668906 ff15???????? 894608 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   6a08                 | push                8
            //   58                   | pop                 eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   668906               | mov                 word ptr [esi], ax
            //   ff15????????         |                     
            //   894608               | mov                 dword ptr [esi + 8], eax

        $sequence_6 = { bf00002000 57 e8???????? 8b35???????? 8d8d34feffff 51 68???????? }
            // n = 7, score = 200
            //   bf00002000           | mov                 edi, 0x200000
            //   57                   | push                edi
            //   e8????????           |                     
            //   8b35????????         |                     
            //   8d8d34feffff         | lea                 ecx, dword ptr [ebp - 0x1cc]
            //   51                   | push                ecx
            //   68????????           |                     

        $sequence_7 = { 668945f0 58 6a70 668945f2 58 6a61 }
            // n = 6, score = 200
            //   668945f0             | mov                 word ptr [ebp - 0x10], ax
            //   58                   | pop                 eax
            //   6a70                 | push                0x70
            //   668945f2             | mov                 word ptr [ebp - 0xe], ax
            //   58                   | pop                 eax
            //   6a61                 | push                0x61

        $sequence_8 = { b8???????? e8???????? 83c40c 84c0 7453 8b742414 }
            // n = 6, score = 200
            //   b8????????           |                     
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   84c0                 | test                al, al
            //   7453                 | je                  0x55
            //   8b742414             | mov                 esi, dword ptr [esp + 0x14]

        $sequence_9 = { 66894d86 66894d88 8bcf 66894d8a 8bc8 58 6a0d }
            // n = 7, score = 200
            //   66894d86             | mov                 word ptr [ebp - 0x7a], cx
            //   66894d88             | mov                 word ptr [ebp - 0x78], cx
            //   8bcf                 | mov                 ecx, edi
            //   66894d8a             | mov                 word ptr [ebp - 0x76], cx
            //   8bc8                 | mov                 ecx, eax
            //   58                   | pop                 eax
            //   6a0d                 | push                0xd

    condition:
        7 of them and filesize < 212992
}
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