rule win_zeus_action_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { bf???????? 0fbe450b 50 68???????? ff15???????? 59 }
            // n = 6, score = 300
            //   bf????????           |                     
            //   0fbe450b             | movsx               eax, byte ptr [ebp + 0xb]
            //   50                   | push                eax
            //   68????????           |                     
            //   ff15????????         |                     
            //   59                   | pop                 ecx

        $sequence_1 = { 7403 895df0 ff75f8 ff15???????? 8d3438 8d443604 e8???????? }
            // n = 7, score = 300
            //   7403                 | je                  5
            //   895df0               | mov                 dword ptr [ebp - 0x10], ebx
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   8d3438               | lea                 esi, [eax + edi]
            //   8d443604             | lea                 eax, [esi + esi + 4]
            //   e8????????           |                     

        $sequence_2 = { 8bf0 83feff 0f841d020000 6a04 8d45ec 50 6a01 }
            // n = 7, score = 300
            //   8bf0                 | mov                 esi, eax
            //   83feff               | cmp                 esi, -1
            //   0f841d020000         | je                  0x223
            //   6a04                 | push                4
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   6a01                 | push                1

        $sequence_3 = { 8d70ff 2bf2 8975f0 85f6 7e67 83650800 8bc7 }
            // n = 7, score = 300
            //   8d70ff               | lea                 esi, [eax - 1]
            //   2bf2                 | sub                 esi, edx
            //   8975f0               | mov                 dword ptr [ebp - 0x10], esi
            //   85f6                 | test                esi, esi
            //   7e67                 | jle                 0x69
            //   83650800             | and                 dword ptr [ebp + 8], 0
            //   8bc7                 | mov                 eax, edi

        $sequence_4 = { 83e107 0fb60410 d3e0 84c0 7930 0fb74618 8b4de0 }
            // n = 7, score = 300
            //   83e107               | and                 ecx, 7
            //   0fb60410             | movzx               eax, byte ptr [eax + edx]
            //   d3e0                 | shl                 eax, cl
            //   84c0                 | test                al, al
            //   7930                 | jns                 0x32
            //   0fb74618             | movzx               eax, word ptr [esi + 0x18]
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]

        $sequence_5 = { d3e0 8945c4 8b45d8 85c0 0f8eab020000 8b55ec 0faf55f0 }
            // n = 7, score = 300
            //   d3e0                 | shl                 eax, cl
            //   8945c4               | mov                 dword ptr [ebp - 0x3c], eax
            //   8b45d8               | mov                 eax, dword ptr [ebp - 0x28]
            //   85c0                 | test                eax, eax
            //   0f8eab020000         | jle                 0x2b1
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]
            //   0faf55f0             | imul                edx, dword ptr [ebp - 0x10]

        $sequence_6 = { 8945f4 53 6a06 6a01 57 ff15???????? 8bd8 }
            // n = 7, score = 300
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   53                   | push                ebx
            //   6a06                 | push                6
            //   6a01                 | push                1
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_7 = { 56 e8???????? 83c40c 85c0 78e2 85ff 7411 }
            // n = 7, score = 300
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   78e2                 | js                  0xffffffe4
            //   85ff                 | test                edi, edi
            //   7411                 | je                  0x13

        $sequence_8 = { 50 ffd7 8975f8 3975fc 0f855b010000 bf04010000 57 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   3975fc               | cmp                 dword ptr [ebp - 4], esi
            //   0f855b010000         | jne                 0x161
            //   bf04010000           | mov                 edi, 0x104
            //   57                   | push                edi

        $sequence_9 = { 8b55c8 8bf1 8975c0 3b4dd0 0f8db1020000 8b4d14 894dd4 }
            // n = 7, score = 300
            //   8b55c8               | mov                 edx, dword ptr [ebp - 0x38]
            //   8bf1                 | mov                 esi, ecx
            //   8975c0               | mov                 dword ptr [ebp - 0x40], esi
            //   3b4dd0               | cmp                 ecx, dword ptr [ebp - 0x30]
            //   0f8db1020000         | jge                 0x2b7
            //   8b4d14               | mov                 ecx, dword ptr [ebp + 0x14]
            //   894dd4               | mov                 dword ptr [ebp - 0x2c], ecx

    condition:
        7 of them and filesize < 827392
}