rule win_lockfile_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.lockfile."
        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.lockfile"
        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 = { 4881c488000000 c3 488d1520580600 488d4c2420 e8???????? 90 488d542420 }
            // n = 7, score = 200
            //   4881c488000000       | je                  0xa5
            //   c3                   | mov                 dword ptr [esp + 0x38], 7
            //   488d1520580600       | dec                 eax
            //   488d4c2420           | lea                 eax, [0x26c8b]
            //   e8????????           |                     
            //   90                   | sete                cl
            //   488d542420           | dec                 esp

        $sequence_1 = { 4983d100 48894120 488b4d50 498b4328 4f8d040a 48f721 4d8d1c00 }
            // n = 7, score = 200
            //   4983d100             | dec                 eax
            //   48894120             | lea                 ecx, [edx + 0xc]
            //   488b4d50             | dec                 eax
            //   498b4328             | mov                 dword ptr [esi + 0x10], ecx
            //   4f8d040a             | dec                 eax
            //   48f721               | mov                 edx, dword ptr [esi + 0x18]
            //   4d8d1c00             | dec                 esp

        $sequence_2 = { 488d056aba0300 4889442420 488d4c2468 e8???????? 90 4c8d4718 488bd3 }
            // n = 7, score = 200
            //   488d056aba0300       | dec                 eax
            //   4889442420           | lea                 edx, [esp + 0x30]
            //   488d4c2468           | dec                 eax
            //   e8????????           |                     
            //   90                   | lea                 eax, [0x3604a]
            //   4c8d4718             | mov                 byte ptr [edi + 0x20], 0
            //   488bd3               | dec                 eax

        $sequence_3 = { 4889542428 488955d8 4c8945e8 66660f1f840000000000 4c8921 4c896108 4c896110 }
            // n = 7, score = 200
            //   4889542428           | xor                 esi, dword ptr [esp + 0x98]
            //   488955d8             | inc                 ecx
            //   4c8945e8             | mov                 ebx, ebx
            //   66660f1f840000000000     | inc    esp
            //   4c8921               | xor                 esi, dword ptr [esp + 0x28]
            //   4c896108             | mov                 eax, edx
            //   4c896110             | inc                 esp

        $sequence_4 = { 8b44243c c1e808 8944243c 0fb644243c c1e003 4898 488d0dff390700 }
            // n = 7, score = 200
            //   8b44243c             | dec                 eax
            //   c1e808               | adc                 edi, 0
            //   8944243c             | dec                 eax
            //   0fb644243c           | mul                 dword ptr [esi + 0x68]
            //   c1e003               | dec                 ecx
            //   4898                 | lea                 ebx, [esi + edi]
            //   488d0dff390700       | dec                 esp

        $sequence_5 = { 4c8d0de9e10400 4533c0 418d501a 488d4db7 e8???????? 0f1000 0f1145d7 }
            // n = 7, score = 200
            //   4c8d0de9e10400       | dec                 eax
            //   4533c0               | mov                 dword ptr [edx + 0x58], eax
            //   418d501a             | dec                 eax
            //   488d4db7             | mov                 eax, dword ptr [edi + 0x60]
            //   e8????????           |                     
            //   0f1000               | dec                 ecx
            //   0f1145d7             | mul                 dword ptr [esi]

        $sequence_6 = { 4c3b4597 4c8b458f 4883d700 483bc1 4983d000 493bd1 4c13c7 }
            // n = 7, score = 200
            //   4c3b4597             | dec                 ecx
            //   4c8b458f             | mov                 eax, dword ptr [edx + 0x30]
            //   4883d700             | dec                 eax
            //   483bc1               | mul                 dword ptr [ebx + 0x50]
            //   4983d000             | dec                 eax
            //   493bd1               | mul                 dword ptr [ebx + 0x48]
            //   4c13c7               | dec                 esp

        $sequence_7 = { 48c1fa05 488bc2 48c1e83f 4803d0 488bca 48d1e9 488bc7 }
            // n = 7, score = 200
            //   48c1fa05             | mov                 ebx, ecx
            //   488bc2               | dec                 ebp
            //   48c1e83f             | mov                 ebx, eax
            //   4803d0               | dec                 esp
            //   488bca               | mov                 edx, dword ptr [ecx]
            //   48d1e9               | dec                 eax
            //   488bc7               | cmp                 dword ptr [edx + 0x10], 0

        $sequence_8 = { c645d64b c645d750 c645d83f c645d987 40887dda 0fb64580 0fb6440d80 }
            // n = 7, score = 200
            //   c645d64b             | cmp                 eax, ecx
            //   c645d750             | dec                 eax
            //   c645d83f             | mov                 ecx, dword ptr [ebp + 0x58]
            //   c645d987             | dec                 ecx
            //   40887dda             | adc                 edx, 0
            //   0fb64580             | dec                 eax
            //   0fb6440d80           | mov                 eax, dword ptr [ecx]

        $sequence_9 = { 89442438 0fb6442438 488d0d6a320700 488d04c1 b901000000 486bc901 ba01000000 }
            // n = 7, score = 200
            //   89442438             | adc                 ebx, ebp
            //   0fb6442438           | dec                 ecx
            //   488d0d6a320700       | mul                 dword ptr [esp + 0x58]
            //   488d04c1             | dec                 esp
            //   b901000000           | add                 edx, ebx
            //   486bc901             | dec                 esp
            //   ba01000000           | mov                 ebx, edx

    condition:
        7 of them and filesize < 1163264
}