SYMBOLCOMMON_NAMEaka. SYNONYMS
win.bart (Back to overview)

Bart


There is no description at this point.

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 (20201023 | autogenerated rule brought to you by yara-signator)
rule win_bart_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.bart"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 773f 7205 80c1ff 79ec 33d2 8bce }
            // n = 6, score = 100
            //   773f                 | ja                  0x41
            //   7205                 | jb                  7
            //   80c1ff               | add                 cl, 0xff
            //   79ec                 | jns                 0xffffffee
            //   33d2                 | xor                 edx, edx
            //   8bce                 | mov                 ecx, esi

        $sequence_1 = { e8???????? 8d857cffffff 50 8d855cffffff }
            // n = 4, score = 100
            //   e8????????           |                     
            //   8d857cffffff         | lea                 eax, [ebp - 0x84]
            //   50                   | push                eax
            //   8d855cffffff         | lea                 eax, [ebp - 0xa4]

        $sequence_2 = { 8d45bc 50 8b83b0000000 ffd0 0fb603 8d951cffffff }
            // n = 6, score = 100
            //   8d45bc               | lea                 eax, [ebp - 0x44]
            //   50                   | push                eax
            //   8b83b0000000         | mov                 eax, dword ptr [ebx + 0xb0]
            //   ffd0                 | call                eax
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   8d951cffffff         | lea                 edx, [ebp - 0xe4]

        $sequence_3 = { bb???????? 8bce 2bde 8d7a08 8b31 8bc6 2b0419 }
            // n = 7, score = 100
            //   bb????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   2bde                 | sub                 ebx, esi
            //   8d7a08               | lea                 edi, [edx + 8]
            //   8b31                 | mov                 esi, dword ptr [ecx]
            //   8bc6                 | mov                 eax, esi
            //   2b0419               | sub                 eax, dword ptr [ecx + ebx]

        $sequence_4 = { 8d45dc 50 8b83b0000000 ffd0 0fb603 8d4d9c 8b7598 }
            // n = 7, score = 100
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax
            //   8b83b0000000         | mov                 eax, dword ptr [ebx + 0xb0]
            //   ffd0                 | call                eax
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   8d4d9c               | lea                 ecx, [ebp - 0x64]
            //   8b7598               | mov                 esi, dword ptr [ebp - 0x68]

        $sequence_5 = { 5b 8b4204 2b02 99 f7fb 6bc00c 0307 }
            // n = 7, score = 100
            //   5b                   | pop                 ebx
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   2b02                 | sub                 eax, dword ptr [edx]
            //   99                   | cdq                 
            //   f7fb                 | idiv                ebx
            //   6bc00c               | imul                eax, eax, 0xc
            //   0307                 | add                 eax, dword ptr [edi]

        $sequence_6 = { 4e 75e5 8b5d94 8b7598 33c0 8bce }
            // n = 6, score = 100
            //   4e                   | dec                 esi
            //   75e5                 | jne                 0xffffffe7
            //   8b5d94               | mov                 ebx, dword ptr [ebp - 0x6c]
            //   8b7598               | mov                 esi, dword ptr [ebp - 0x68]
            //   33c0                 | xor                 eax, eax
            //   8bce                 | mov                 ecx, esi

        $sequence_7 = { 83ec18 56 33f6 8975dc 8975e0 }
            // n = 5, score = 100
            //   83ec18               | sub                 esp, 0x18
            //   56                   | push                esi
            //   33f6                 | xor                 esi, esi
            //   8975dc               | mov                 dword ptr [ebp - 0x24], esi
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi

        $sequence_8 = { 50 e8???????? 8d8d38feffff 51 ff30 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d8d38feffff         | lea                 ecx, [ebp - 0x1c8]
            //   51                   | push                ecx
            //   ff30                 | push                dword ptr [eax]

        $sequence_9 = { ff75fc ff15???????? ff75fc ff15???????? 53 56 57 }
            // n = 7, score = 100
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff15????????         |                     
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff15????????         |                     
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi

    condition:
        7 of them and filesize < 163840
}
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