rule win_unidentified_003_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.unidentified_003."
        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.unidentified_003"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 5e 5b 8bc1 c20800 55 8bec }
            // n = 6, score = 100
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8bc1                 | mov                 eax, ecx
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_1 = { 53 a3???????? 8d4577 50 57 33db }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   a3????????           |                     
            //   8d4577               | lea                 eax, [ebp + 0x77]
            //   50                   | push                eax
            //   57                   | push                edi
            //   33db                 | xor                 ebx, ebx

        $sequence_2 = { 56 56 8d45d0 50 ff75b8 ff75e0 ff15???????? }
            // n = 7, score = 100
            //   56                   | push                esi
            //   56                   | push                esi
            //   8d45d0               | lea                 eax, [ebp - 0x30]
            //   50                   | push                eax
            //   ff75b8               | push                dword ptr [ebp - 0x48]
            //   ff75e0               | push                dword ptr [ebp - 0x20]
            //   ff15????????         |                     

        $sequence_3 = { 8b430c 50 50 6a0d 897b04 8b0f 57 }
            // n = 7, score = 100
            //   8b430c               | mov                 eax, dword ptr [ebx + 0xc]
            //   50                   | push                eax
            //   50                   | push                eax
            //   6a0d                 | push                0xd
            //   897b04               | mov                 dword ptr [ebx + 4], edi
            //   8b0f                 | mov                 ecx, dword ptr [edi]
            //   57                   | push                edi

        $sequence_4 = { 56 e8???????? 83c40c 85c0 0f8525010000 83c60e }
            // n = 6, score = 100
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   0f8525010000         | jne                 0x12b
            //   83c60e               | add                 esi, 0xe

        $sequence_5 = { 85c0 75c7 85db 780b 8b45fc 894604 33c0 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   75c7                 | jne                 0xffffffc9
            //   85db                 | test                ebx, ebx
            //   780b                 | js                  0xd
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   894604               | mov                 dword ptr [esi + 4], eax
            //   33c0                 | xor                 eax, eax

        $sequence_6 = { 53 8dbdedfbffff c6002d e8???????? 53 53 8dbdf2fbffff }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   8dbdedfbffff         | lea                 edi, [ebp - 0x413]
            //   c6002d               | mov                 byte ptr [eax], 0x2d
            //   e8????????           |                     
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   8dbdf2fbffff         | lea                 edi, [ebp - 0x40e]

        $sequence_7 = { 68???????? ff75f8 ff15???????? ff75dc ff7508 56 ff75f8 }
            // n = 7, score = 100
            //   68????????           |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   ff75dc               | push                dword ptr [ebp - 0x24]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   56                   | push                esi
            //   ff75f8               | push                dword ptr [ebp - 8]

        $sequence_8 = { 47 84c9 75f8 be???????? 66a5 8b750c }
            // n = 6, score = 100
            //   47                   | inc                 edi
            //   84c9                 | test                cl, cl
            //   75f8                 | jne                 0xfffffffa
            //   be????????           |                     
            //   66a5                 | movsw               word ptr es:[edi], word ptr [esi]
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]

        $sequence_9 = { 55 8bec 81ecb4000000 53 56 57 33f6 }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ecb4000000         | sub                 esp, 0xb4
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   33f6                 | xor                 esi, esi

    condition:
        7 of them and filesize < 57344
}