SYMBOLCOMMON_NAMEaka. SYNONYMS
win.bitter_rat (Back to overview)

Bitter RAT

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References
2022-07-05SECUINFRASECUINFRA Falcon Team
@online{team:20220705:whatever:caa840b, author = {SECUINFRA Falcon Team}, title = {{Whatever floats your Boat – Bitter APT continues to target Bangladesh}}, date = {2022-07-05}, organization = {SECUINFRA}, url = {https://www.secuinfra.com/en/techtalk/whatever-floats-your-boat-bitter-apt-continues-to-target-bangladesh/}, language = {English}, urldate = {2022-07-13} } Whatever floats your Boat – Bitter APT continues to target Bangladesh
AlmondRAT Artra Downloader Bitter RAT ZxxZ
2022-05-11Cisco TalosCisco Talos
@online{talos:20220511:bitter:c463e99, author = {Cisco Talos}, title = {{Bitter APT adds Bangladesh to their targets}}, date = {2022-05-11}, organization = {Cisco Talos}, url = {https://blog.talosintelligence.com/2022/05/bitter-apt-adds-bangladesh-to-their.html}, language = {English}, urldate = {2022-05-13} } Bitter APT adds Bangladesh to their targets
AndroRAT Artra Downloader Bitter RAT ZxxZ
2020-06-19BitdefenderOana Asoltanei, Denis Cosmin Nutiu, Alin Mihai Barbatei
@techreport{asoltanei:20200619:bitterapt:2e8e1d2, author = {Oana Asoltanei and Denis Cosmin Nutiu and Alin Mihai Barbatei}, title = {{BitterAPT Revisited: the Untold Evolution of an Android Espionage Tool}}, date = {2020-06-19}, institution = {Bitdefender}, url = {https://www.bitdefender.com/files/News/CaseStudies/study/352/Bitdefender-PR-Whitepaper-BitterAPT-creat4571-en-EN-GenericUse.pdf}, language = {English}, urldate = {2020-06-21} } BitterAPT Revisited: the Untold Evolution of an Android Espionage Tool
AndroRAT Artra Downloader Bitter RAT HAZY TIGER
2018-11-29360 Threat IntelligenceThreat Intelligence Center
@online{center:20181129:analysis:d46e3e4, author = {Threat Intelligence Center}, title = {{Analysis Of Targeted Attack Against Pakistan By Exploiting InPage Vulnerability And Related APT Groups}}, date = {2018-11-29}, organization = {360 Threat Intelligence}, url = {https://ti.qianxin.com/blog/articles/analysis-of-targeted-attack-against-pakistan-by-exploiting-inpage-vulnerability-and-related-apt-groups-english/}, language = {English}, urldate = {2022-01-03} } Analysis Of Targeted Attack Against Pakistan By Exploiting InPage Vulnerability And Related APT Groups
BioData Bitter RAT WSCSPL
2016-10-21ForcepointRolanda Dela Paz
@online{paz:20161021:bitter:5d8ac74, author = {Rolanda Dela Paz}, title = {{BITTER: a targeted attack against Pakistan}}, date = {2016-10-21}, organization = {Forcepoint}, url = {https://www.forcepoint.com/blog/security-labs/bitter-targeted-attack-against-pakistan}, language = {English}, urldate = {2020-01-13} } BITTER: a targeted attack against Pakistan
Bitter RAT
Yara Rules
[TLP:WHITE] win_bitter_rat_auto (20230125 | Detects win.bitter_rat.)
rule win_bitter_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.bitter_rat."
        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.bitter_rat"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 2b34bd00124700 c1fe06 8bc7 c1e005 }
            // n = 4, score = 200
            //   2b34bd00124700       | sub                 esi, dword ptr [edi*4 + 0x471200]
            //   c1fe06               | sar                 esi, 6
            //   8bc7                 | mov                 eax, edi
            //   c1e005               | shl                 eax, 5

        $sequence_1 = { 83c404 83c001 50 e8???????? 83c404 8945f4 8d85dcfeffff }
            // n = 7, score = 200
            //   83c404               | add                 esp, 4
            //   83c001               | add                 eax, 1
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8d85dcfeffff         | lea                 eax, [ebp - 0x124]

        $sequence_2 = { 8b4df4 51 e8???????? 83c408 8bf4 8b8580edffff }
            // n = 6, score = 200
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8bf4                 | mov                 esi, esp
            //   8b8580edffff         | mov                 eax, dword ptr [ebp - 0x1280]

        $sequence_3 = { ff34c52c3a4500 53 57 e8???????? 83c40c 85c0 740d }
            // n = 7, score = 200
            //   ff34c52c3a4500       | push                dword ptr [eax*8 + 0x453a2c]
            //   53                   | push                ebx
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   740d                 | je                  0xf

        $sequence_4 = { 8945fc 8bf4 8d8568feffff 50 6a02 ff15???????? 3bf4 }
            // n = 7, score = 200
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8bf4                 | mov                 esi, esp
            //   8d8568feffff         | lea                 eax, [ebp - 0x198]
            //   50                   | push                eax
            //   6a02                 | push                2
            //   ff15????????         |                     
            //   3bf4                 | cmp                 esi, esp

        $sequence_5 = { 50 8d15c8324200 e8???????? 58 }
            // n = 4, score = 200
            //   50                   | push                eax
            //   8d15c8324200         | lea                 edx, [0x4232c8]
            //   e8????????           |                     
            //   58                   | pop                 eax

        $sequence_6 = { e8???????? 6a0d 68???????? e8???????? 83c408 a1???????? }
            // n = 6, score = 200
            //   e8????????           |                     
            //   6a0d                 | push                0xd
            //   68????????           |                     
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   a1????????           |                     

        $sequence_7 = { 6a01 68???????? 8b85e8feffff 2b85dcfeffff 05???????? 50 }
            // n = 6, score = 200
            //   6a01                 | push                1
            //   68????????           |                     
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   2b85dcfeffff         | sub                 eax, dword ptr [ebp - 0x124]
            //   05????????           |                     
            //   50                   | push                eax

        $sequence_8 = { 8bec b864240000 e8???????? 53 }
            // n = 4, score = 200
            //   8bec                 | mov                 ebp, esp
            //   b864240000           | mov                 eax, 0x2464
            //   e8????????           |                     
            //   53                   | push                ebx

        $sequence_9 = { eb44 8b8534f0ffff 50 8b8d9cfeffff 51 8d9510c9ffff 52 }
            // n = 7, score = 200
            //   eb44                 | jmp                 0x46
            //   8b8534f0ffff         | mov                 eax, dword ptr [ebp - 0xfcc]
            //   50                   | push                eax
            //   8b8d9cfeffff         | mov                 ecx, dword ptr [ebp - 0x164]
            //   51                   | push                ecx
            //   8d9510c9ffff         | lea                 edx, [ebp - 0x36f0]
            //   52                   | push                edx

    condition:
        7 of them and filesize < 1130496
}
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