rule win_unidentified_041_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.unidentified_041."
        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_041"
        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 = { 0f8557ffffff 8b5c2478 8b7c2414 56 e8???????? 59 85db }
            // n = 7, score = 200
            //   0f8557ffffff         | jne                 0xffffff5d
            //   8b5c2478             | mov                 ebx, dword ptr [esp + 0x78]
            //   8b7c2414             | mov                 edi, dword ptr [esp + 0x14]
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   85db                 | test                ebx, ebx

        $sequence_1 = { 58 0f44d8 895c2410 33db e9???????? 8b4308 8bcf }
            // n = 7, score = 200
            //   58                   | pop                 eax
            //   0f44d8               | cmove               ebx, eax
            //   895c2410             | mov                 dword ptr [esp + 0x10], ebx
            //   33db                 | xor                 ebx, ebx
            //   e9????????           |                     
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]
            //   8bcf                 | mov                 ecx, edi

        $sequence_2 = { 56 6a01 8d4c241c e8???????? 8bcb e8???????? 84c0 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   6a01                 | push                1
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   e8????????           |                     
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   84c0                 | test                al, al

        $sequence_3 = { 84c0 751b c70100000000 8bc1 c7410400000000 c7410800000000 }
            // n = 6, score = 200
            //   84c0                 | test                al, al
            //   751b                 | jne                 0x1d
            //   c70100000000         | mov                 dword ptr [ecx], 0
            //   8bc1                 | mov                 eax, ecx
            //   c7410400000000       | mov                 dword ptr [ecx + 4], 0
            //   c7410800000000       | mov                 dword ptr [ecx + 8], 0

        $sequence_4 = { 8b4f08 894e08 8907 894704 894708 5f 8bc6 }
            // n = 7, score = 200
            //   8b4f08               | mov                 ecx, dword ptr [edi + 8]
            //   894e08               | mov                 dword ptr [esi + 8], ecx
            //   8907                 | mov                 dword ptr [edi], eax
            //   894704               | mov                 dword ptr [edi + 4], eax
            //   894708               | mov                 dword ptr [edi + 8], eax
            //   5f                   | pop                 edi
            //   8bc6                 | mov                 eax, esi

        $sequence_5 = { 53 8975e8 e8???????? 895dfc 895e04 885e08 895e0c }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   8975e8               | mov                 dword ptr [ebp - 0x18], esi
            //   e8????????           |                     
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   895e04               | mov                 dword ptr [esi + 4], ebx
            //   885e08               | mov                 byte ptr [esi + 8], bl
            //   895e0c               | mov                 dword ptr [esi + 0xc], ebx

        $sequence_6 = { ba???????? c78424c800000000000000 8d4c2404 e8???????? 8d8424a0000000 50 8d4c2408 }
            // n = 7, score = 200
            //   ba????????           |                     
            //   c78424c800000000000000     | mov    dword ptr [esp + 0xc8], 0
            //   8d4c2404             | lea                 ecx, [esp + 4]
            //   e8????????           |                     
            //   8d8424a0000000       | lea                 eax, [esp + 0xa0]
            //   50                   | push                eax
            //   8d4c2408             | lea                 ecx, [esp + 8]

        $sequence_7 = { ff75dc 899d98feffff ffd7 8b8598feffff 33c9 6a02 5a }
            // n = 7, score = 200
            //   ff75dc               | push                dword ptr [ebp - 0x24]
            //   899d98feffff         | mov                 dword ptr [ebp - 0x168], ebx
            //   ffd7                 | call                edi
            //   8b8598feffff         | mov                 eax, dword ptr [ebp - 0x168]
            //   33c9                 | xor                 ecx, ecx
            //   6a02                 | push                2
            //   5a                   | pop                 edx

        $sequence_8 = { 3bca 730d 33d2 83c8ff 42 85c9 0f44c2 }
            // n = 7, score = 200
            //   3bca                 | cmp                 ecx, edx
            //   730d                 | jae                 0xf
            //   33d2                 | xor                 edx, edx
            //   83c8ff               | or                  eax, 0xffffffff
            //   42                   | inc                 edx
            //   85c9                 | test                ecx, ecx
            //   0f44c2               | cmove               eax, edx

        $sequence_9 = { 0f8240030000 ff75a4 e8???????? 83c404 e9???????? 8b45a0 b90f000000 }
            // n = 7, score = 200
            //   0f8240030000         | jb                  0x346
            //   ff75a4               | push                dword ptr [ebp - 0x5c]
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   e9????????           |                     
            //   8b45a0               | mov                 eax, dword ptr [ebp - 0x60]
            //   b90f000000           | mov                 ecx, 0xf

    condition:
        7 of them and filesize < 1097728
}