SYMBOLCOMMON_NAMEaka. SYNONYMS
win.bart (Back to overview)

Bart


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References
2020-08-20CERT-FRCERT-FR
@techreport{certfr:20200820:development:d518522, author = {CERT-FR}, title = {{Development of the Activity of the TA505 Cybercriminal Group}}, date = {2020-08-20}, institution = {CERT-FR}, url = {https://www.cert.ssi.gouv.fr/uploads/CERTFR-2020-CTI-009.pdf}, language = {English}, urldate = {2020-08-28} } Development of the Activity of the TA505 Cybercriminal Group
AndroMut Bart Clop Dridex FlawedAmmyy FlawedGrace Get2 Locky Marap QuantLoader SDBbot ServHelper tRat TrickBot
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
2020-05-21Intel 471Intel 471
@online{471:20200521:brief:048d164, author = {Intel 471}, title = {{A brief history of TA505}}, date = {2020-05-21}, organization = {Intel 471}, url = {https://blog.intel471.com/2020/05/21/a-brief-history-of-ta505/}, language = {English}, urldate = {2020-05-23} } A brief history of TA505
AndroMut Bart Dridex FlawedAmmyy FlawedGrace Gandcrab Get2 GlobeImposter Jaff Kegotip Locky Necurs Philadephia Ransom Pony QuantLoader Rockloader SDBbot ServHelper Shifu Snatch TrickBot
Yara Rules
[TLP:WHITE] win_bart_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_bart_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.bart"
        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 = { 89450c e8???????? 8b0e 8b13 8a01 41 8802 }
            // n = 7, score = 100
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   e8????????           |                     
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   8b13                 | mov                 edx, dword ptr [ebx]
            //   8a01                 | mov                 al, byte ptr [ecx]
            //   41                   | inc                 ecx
            //   8802                 | mov                 byte ptr [edx], al

        $sequence_1 = { 50 53 ffd7 8a4608 83c448 8845ff 8d45ff }
            // n = 7, score = 100
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ffd7                 | call                edi
            //   8a4608               | mov                 al, byte ptr [esi + 8]
            //   83c448               | add                 esp, 0x48
            //   8845ff               | mov                 byte ptr [ebp - 1], al
            //   8d45ff               | lea                 eax, [ebp - 1]

        $sequence_2 = { 66c1e005 662bc3 8b5df8 98 8945f4 0fbec2 c1e002 }
            // n = 7, score = 100
            //   66c1e005             | shl                 ax, 5
            //   662bc3               | sub                 ax, bx
            //   8b5df8               | mov                 ebx, dword ptr [ebp - 8]
            //   98                   | cwde                
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   0fbec2               | movsx               eax, dl
            //   c1e002               | shl                 eax, 2

        $sequence_3 = { 2bde 6a3d 8d45cc 8bcf 50 e8???????? 50 }
            // n = 7, score = 100
            //   2bde                 | sub                 ebx, esi
            //   6a3d                 | push                0x3d
            //   8d45cc               | lea                 eax, [ebp - 0x34]
            //   8bcf                 | mov                 ecx, edi
            //   50                   | push                eax
            //   e8????????           |                     
            //   50                   | push                eax

        $sequence_4 = { 7205 80c1ff 79e8 33c9 b8???????? 2bc6 8bd8 }
            // n = 7, score = 100
            //   7205                 | jb                  7
            //   80c1ff               | add                 cl, 0xff
            //   79e8                 | jns                 0xffffffea
            //   33c9                 | xor                 ecx, ecx
            //   b8????????           |                     
            //   2bc6                 | sub                 eax, esi
            //   8bd8                 | mov                 ebx, eax

        $sequence_5 = { 8a18 894dd0 8955c8 8945cc 57 }
            // n = 5, score = 100
            //   8a18                 | mov                 bl, byte ptr [eax]
            //   894dd0               | mov                 dword ptr [ebp - 0x30], ecx
            //   8955c8               | mov                 dword ptr [ebp - 0x38], edx
            //   8945cc               | mov                 dword ptr [ebp - 0x34], eax
            //   57                   | push                edi

        $sequence_6 = { 8b5a04 894de8 8bc8 e8???????? 2175fc c745dc01000000 85db }
            // n = 7, score = 100
            //   8b5a04               | mov                 ebx, dword ptr [edx + 4]
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   2175fc               | and                 dword ptr [ebp - 4], esi
            //   c745dc01000000       | mov                 dword ptr [ebp - 0x24], 1
            //   85db                 | test                ebx, ebx

        $sequence_7 = { f3a5 8bbdd4feffff 8db51cffffff 03fa 0fb6c8 f3a5 }
            // n = 6, score = 100
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bbdd4feffff         | mov                 edi, dword ptr [ebp - 0x12c]
            //   8db51cffffff         | lea                 esi, [ebp - 0xe4]
            //   03fa                 | add                 edi, edx
            //   0fb6c8               | movzx               ecx, al
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]

        $sequence_8 = { 85c9 8d0c1b 0f95c0 2bc1 8b4dfc 5e 33cd }
            // n = 7, score = 100
            //   85c9                 | test                ecx, ecx
            //   8d0c1b               | lea                 ecx, [ebx + ebx]
            //   0f95c0               | setne               al
            //   2bc1                 | sub                 eax, ecx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   5e                   | pop                 esi
            //   33cd                 | xor                 ecx, ebp

        $sequence_9 = { 83c434 84c0 7e11 8bbd54ffffff 8db55cffffff 0fb6c8 f3a5 }
            // n = 7, score = 100
            //   83c434               | add                 esp, 0x34
            //   84c0                 | test                al, al
            //   7e11                 | jle                 0x13
            //   8bbd54ffffff         | mov                 edi, dword ptr [ebp - 0xac]
            //   8db55cffffff         | lea                 esi, [ebp - 0xa4]
            //   0fb6c8               | movzx               ecx, al
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]

    condition:
        7 of them and filesize < 163840
}
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