rule win_odinaff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.odinaff."
        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.odinaff"
        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 = { ff15???????? 3d1f040000 7505 bf01000000 56 ff15???????? 8bc7 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   3d1f040000           | cmp                 eax, 0x41f
            //   7505                 | jne                 7
            //   bf01000000           | mov                 edi, 1
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bc7                 | mov                 eax, edi

        $sequence_1 = { 50 53 68???????? 33db b8???????? e8???????? 8b1d???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   53                   | push                ebx
            //   68????????           |                     
            //   33db                 | xor                 ebx, ebx
            //   b8????????           |                     
            //   e8????????           |                     
            //   8b1d????????         |                     

        $sequence_2 = { 750e ff15???????? 8b4df4 33c0 668901 }
            // n = 5, score = 200
            //   750e                 | jne                 0x10
            //   ff15????????         |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   33c0                 | xor                 eax, eax
            //   668901               | mov                 word ptr [ecx], ax

        $sequence_3 = { 56 6804010000 8bd8 ff15???????? 53 6a00 }
            // n = 6, score = 200
            //   56                   | push                esi
            //   6804010000           | push                0x104
            //   8bd8                 | mov                 ebx, eax
            //   ff15????????         |                     
            //   53                   | push                ebx
            //   6a00                 | push                0

        $sequence_4 = { 681c010000 8d8dc8feffff 6a00 51 }
            // n = 4, score = 200
            //   681c010000           | push                0x11c
            //   8d8dc8feffff         | lea                 ecx, [ebp - 0x138]
            //   6a00                 | push                0
            //   51                   | push                ecx

        $sequence_5 = { 6a08 895df8 ffd7 50 ffd6 }
            // n = 5, score = 200
            //   6a08                 | push                8
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   ffd7                 | call                edi
            //   50                   | push                eax
            //   ffd6                 | call                esi

        $sequence_6 = { 50 ffd7 8945f0 33c0 6a3c 50 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   33c0                 | xor                 eax, eax
            //   6a3c                 | push                0x3c
            //   50                   | push                eax

        $sequence_7 = { 03c9 51 56 ffd3 }
            // n = 4, score = 200
            //   03c9                 | add                 ecx, ecx
            //   51                   | push                ecx
            //   56                   | push                esi
            //   ffd3                 | call                ebx

        $sequence_8 = { 6a08 8bd8 c745fc00010000 ff15???????? 50 ff15???????? }
            // n = 6, score = 200
            //   6a08                 | push                8
            //   8bd8                 | mov                 ebx, eax
            //   c745fc00010000       | mov                 dword ptr [ebp - 4], 0x100
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_9 = { 68???????? 56 8b35???????? c785c8feffff1c010000 ffd6 85c0 }
            // n = 6, score = 200
            //   68????????           |                     
            //   56                   | push                esi
            //   8b35????????         |                     
            //   c785c8feffff1c010000     | mov    dword ptr [ebp - 0x138], 0x11c
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 73728
}