rule win_lock_pos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.lock_pos."
        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.lock_pos"
        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 = { 55 8bec 8b4508 8b0d???????? 8b0481 }
            // n = 5, score = 400
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b0d????????         |                     
            //   8b0481               | mov                 eax, dword ptr [ecx + eax*4]

        $sequence_1 = { 8bec 837d0800 7704 33c0 }
            // n = 4, score = 400
            //   8bec                 | mov                 ebp, esp
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   7704                 | ja                  6
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 8d85f8fdffff 50 6a00 6a00 6a23 }
            // n = 5, score = 300
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a23                 | push                0x23

        $sequence_3 = { 55 8bec 81eca4040000 56 }
            // n = 4, score = 300
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81eca4040000         | sub                 esp, 0x4a4
            //   56                   | push                esi

        $sequence_4 = { 6a00 6a23 6a00 ff15???????? 8d8df8fdffff }
            // n = 5, score = 300
            //   6a00                 | push                0
            //   6a23                 | push                0x23
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8d8df8fdffff         | lea                 ecx, [ebp - 0x208]

        $sequence_5 = { 50 e8???????? 83c404 8945f0 837df000 741b }
            // n = 6, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   741b                 | je                  0x1d

        $sequence_6 = { 3b4d0c 7332 8b5508 0355fc 0fbe02 }
            // n = 5, score = 200
            //   3b4d0c               | cmp                 ecx, dword ptr [ebp + 0xc]
            //   7332                 | jae                 0x34
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   0355fc               | add                 edx, dword ptr [ebp - 4]
            //   0fbe02               | movsx               eax, byte ptr [edx]

        $sequence_7 = { 037df8 ff15???????? 394708 7415 8d5f0c 53 }
            // n = 6, score = 200
            //   037df8               | add                 edi, dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   394708               | cmp                 dword ptr [edi + 8], eax
            //   7415                 | je                  0x17
            //   8d5f0c               | lea                 ebx, [edi + 0xc]
            //   53                   | push                ebx

        $sequence_8 = { 53 8bd8 56 8bcb e8???????? 8bd0 03d2 }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   8bd8                 | mov                 ebx, eax
            //   56                   | push                esi
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   03d2                 | add                 edx, edx

        $sequence_9 = { 8b45fc 8b4de4 0308 894de8 8b55fc 8b4204 83e808 }
            // n = 7, score = 200
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   0308                 | add                 ecx, dword ptr [eax]
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   83e808               | sub                 eax, 8

        $sequence_10 = { 0f847b010000 57 6a04 5f 8d75b4 }
            // n = 5, score = 200
            //   0f847b010000         | je                  0x181
            //   57                   | push                edi
            //   6a04                 | push                4
            //   5f                   | pop                 edi
            //   8d75b4               | lea                 esi, [ebp - 0x4c]

        $sequence_11 = { 8945c8 8955cc 8b550c 33c0 }
            // n = 4, score = 200
            //   8945c8               | mov                 dword ptr [ebp - 0x38], eax
            //   8955cc               | mov                 dword ptr [ebp - 0x34], edx
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   33c0                 | xor                 eax, eax

        $sequence_12 = { 99 8945e0 8955e4 6a04 8d4dc8 }
            // n = 5, score = 200
            //   99                   | cdq                 
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8955e4               | mov                 dword ptr [ebp - 0x1c], edx
            //   6a04                 | push                4
            //   8d4dc8               | lea                 ecx, [ebp - 0x38]

    condition:
        7 of them and filesize < 319488
}