rule win_rusty_claw_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.rusty_claw."
        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.rusty_claw"
        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 = { e8???????? 31c9 89f2 c645e301 c745f001000000 e8???????? 0f0b }
            // n = 7, score = 100
            //   e8????????           |                     
            //   31c9                 | xor                 ecx, ecx
            //   89f2                 | mov                 edx, esi
            //   c645e301             | mov                 byte ptr [ebp - 0x1d], 1
            //   c745f001000000       | mov                 dword ptr [ebp - 0x10], 1
            //   e8????????           |                     
            //   0f0b                 | ud2                 

        $sequence_1 = { 8d742410 8d442430 8930 c74004???????? 894808 c7400c29a64000 8d742408 }
            // n = 7, score = 100
            //   8d742410             | lea                 esi, [esp + 0x10]
            //   8d442430             | lea                 eax, [esp + 0x30]
            //   8930                 | mov                 dword ptr [eax], esi
            //   c74004????????       |                     
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   c7400c29a64000       | mov                 dword ptr [eax + 0xc], 0x40a629
            //   8d742408             | lea                 esi, [esp + 8]

        $sequence_2 = { e8???????? 83c40c 8b4dd4 8b55c8 e8???????? 8b4da4 8b55a8 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   8b55c8               | mov                 edx, dword ptr [ebp - 0x38]
            //   e8????????           |                     
            //   8b4da4               | mov                 ecx, dword ptr [ebp - 0x5c]
            //   8b55a8               | mov                 edx, dword ptr [ebp - 0x58]

        $sequence_3 = { c3 55 83ec0c 8db524fbffff 8baec8040000 8b4e20 8b5624 }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   83ec0c               | sub                 esp, 0xc
            //   8db524fbffff         | lea                 esi, [ebp - 0x4dc]
            //   8baec8040000         | mov                 ebp, dword ptr [esi + 0x4c8]
            //   8b4e20               | mov                 ecx, dword ptr [esi + 0x20]
            //   8b5624               | mov                 edx, dword ptr [esi + 0x24]

        $sequence_4 = { 0f84e6020000 85d2 8915???????? 0f84d8020000 ffd2 8b15???????? 89c6 }
            // n = 7, score = 100
            //   0f84e6020000         | je                  0x2ec
            //   85d2                 | test                edx, edx
            //   8915????????         |                     
            //   0f84d8020000         | je                  0x2de
            //   ffd2                 | call                edx
            //   8b15????????         |                     
            //   89c6                 | mov                 esi, eax

        $sequence_5 = { 894808 89700c 8b4a14 8b5218 50 eb2a 8b4500 }
            // n = 7, score = 100
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   89700c               | mov                 dword ptr [eax + 0xc], esi
            //   8b4a14               | mov                 ecx, dword ptr [edx + 0x14]
            //   8b5218               | mov                 edx, dword ptr [edx + 0x18]
            //   50                   | push                eax
            //   eb2a                 | jmp                 0x2c
            //   8b4500               | mov                 eax, dword ptr [ebp]

        $sequence_6 = { 58 59 8b4304 833b00 7406 8b742414 }
            // n = 6, score = 100
            //   58                   | pop                 eax
            //   59                   | pop                 ecx
            //   8b4304               | mov                 eax, dword ptr [ebx + 4]
            //   833b00               | cmp                 dword ptr [ebx], 0
            //   7406                 | je                  8
            //   8b742414             | mov                 esi, dword ptr [esp + 0x14]

        $sequence_7 = { 8945e0 c6411001 83c01c 8365f000 89c1 e8???????? }
            // n = 6, score = 100
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   c6411001             | mov                 byte ptr [ecx + 0x10], 1
            //   83c01c               | add                 eax, 0x1c
            //   8365f000             | and                 dword ptr [ebp - 0x10], 0
            //   89c1                 | mov                 ecx, eax
            //   e8????????           |                     

        $sequence_8 = { 6a1f 8975e0 56 e8???????? 6a00 6a00 6a00 }
            // n = 7, score = 100
            //   6a1f                 | push                0x1f
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi
            //   56                   | push                esi
            //   e8????????           |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_9 = { 89e2 56 50 8d742428 56 e8???????? }
            // n = 6, score = 100
            //   89e2                 | mov                 edx, esp
            //   56                   | push                esi
            //   50                   | push                eax
            //   8d742428             | lea                 esi, [esp + 0x28]
            //   56                   | push                esi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 518144
}