SYMBOLCOMMON_NAMEaka. SYNONYMS
win.zeus_action (Back to overview)

ZeusAction


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References
2021-01-28Youtube (Virus Bulletin)Benoît Ancel
@online{ancel:20210128:bagsu:7de60de, author = {Benoît Ancel}, title = {{The Bagsu banker case}}, date = {2021-01-28}, organization = {Youtube (Virus Bulletin)}, url = {https://www.youtube.com/watch?v=EyDiIAt__dI}, language = {English}, urldate = {2021-02-01} } The Bagsu banker case
Azorult DreamBot Emotet Pony TrickBot ZeusAction
2019-06-07Twitter (@benkow_)Benoît Ancel
@online{ancel:20190607:zeusaction:5977152, author = {Benoît Ancel}, title = {{Tweet on ZeusAction hashes}}, date = {2019-06-07}, organization = {Twitter (@benkow_)}, url = {https://twitter.com/benkow_/status/1136983062699487232}, language = {English}, urldate = {2020-01-06} } Tweet on ZeusAction hashes
ZeusAction
Yara Rules
[TLP:WHITE] win_zeus_action_auto (20220411 | Detects win.zeus_action.)
rule win_zeus_action_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.zeus_action."
        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.zeus_action"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 8b4e48 034d08 c745f401000000 894814 8b4e50 034d08 894808 }
            // n = 7, score = 300
            //   8b4e48               | mov                 ecx, dword ptr [esi + 0x48]
            //   034d08               | add                 ecx, dword ptr [ebp + 8]
            //   c745f401000000       | mov                 dword ptr [ebp - 0xc], 1
            //   894814               | mov                 dword ptr [eax + 0x14], ecx
            //   8b4e50               | mov                 ecx, dword ptr [esi + 0x50]
            //   034d08               | add                 ecx, dword ptr [ebp + 8]
            //   894808               | mov                 dword ptr [eax + 8], ecx

        $sequence_1 = { 33d2 8955f8 85c0 0f8eaf010000 894dd4 0fb70451 663b45d0 }
            // n = 7, score = 300
            //   33d2                 | xor                 edx, edx
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   85c0                 | test                eax, eax
            //   0f8eaf010000         | jle                 0x1b5
            //   894dd4               | mov                 dword ptr [ebp - 0x2c], ecx
            //   0fb70451             | movzx               eax, word ptr [ecx + edx*2]
            //   663b45d0             | cmp                 ax, word ptr [ebp - 0x30]

        $sequence_2 = { 41 84c0 75f9 2bca 53 8d4101 0183d8750000 }
            // n = 7, score = 300
            //   41                   | inc                 ecx
            //   84c0                 | test                al, al
            //   75f9                 | jne                 0xfffffffb
            //   2bca                 | sub                 ecx, edx
            //   53                   | push                ebx
            //   8d4101               | lea                 eax, dword ptr [ecx + 1]
            //   0183d8750000         | add                 dword ptr [ebx + 0x75d8], eax

        $sequence_3 = { 0f45f2 8975f8 8b7508 8d95d4feffff 8bce 2bd6 8a01 }
            // n = 7, score = 300
            //   0f45f2               | cmovne              esi, edx
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8d95d4feffff         | lea                 edx, dword ptr [ebp - 0x12c]
            //   8bce                 | mov                 ecx, esi
            //   2bd6                 | sub                 edx, esi
            //   8a01                 | mov                 al, byte ptr [ecx]

        $sequence_4 = { e8???????? 59 891d???????? a1???????? 85c0 7409 50 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   891d????????         |                     
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   50                   | push                eax

        $sequence_5 = { 8b7de0 8b4df4 8b55e0 8bf0 f3a4 8b4df4 8b75f8 }
            // n = 7, score = 300
            //   8b7de0               | mov                 edi, dword ptr [ebp - 0x20]
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   8bf0                 | mov                 esi, eax
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   8b75f8               | mov                 esi, dword ptr [ebp - 8]

        $sequence_6 = { ff7308 ff7328 85c0 7409 50 56 e8???????? }
            // n = 7, score = 300
            //   ff7308               | push                dword ptr [ebx + 8]
            //   ff7328               | push                dword ptr [ebx + 0x28]
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_7 = { 5f 7517 05c8020000 50 6a00 53 e8???????? }
            // n = 7, score = 300
            //   5f                   | pop                 edi
            //   7517                 | jne                 0x19
            //   05c8020000           | add                 eax, 0x2c8
            //   50                   | push                eax
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   e8????????           |                     

        $sequence_8 = { f685a8fdffff10 7467 68???????? 8d85d4fdffff 50 ff15???????? 85c0 }
            // n = 7, score = 300
            //   f685a8fdffff10       | test                byte ptr [ebp - 0x258], 0x10
            //   7467                 | je                  0x69
            //   68????????           |                     
            //   8d85d4fdffff         | lea                 eax, dword ptr [ebp - 0x22c]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_9 = { 59 59 3bfb 744a 8d85f8fdffff 50 }
            // n = 6, score = 300
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   3bfb                 | cmp                 edi, ebx
            //   744a                 | je                  0x4c
            //   8d85f8fdffff         | lea                 eax, dword ptr [ebp - 0x208]
            //   50                   | push                eax

    condition:
        7 of them and filesize < 827392
}
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