rule win_lockfile_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 4883d200 4533c0 4d3bd3 488955cf 4c8b5d87 410f92c0 493bc9 }
            // n = 7, score = 200
            //   4883d200             | lea                 ecx, [ebx + 0x70]
            //   4533c0               | mov                 ebx, dword ptr [eax + 8]
            //   4d3bd3               | dec                 eax
            //   488955cf             | mov                 dword ptr [esp + 0x40], ecx
            //   4c8b5d87             | mov                 dword ptr [esp + 0x48], ebx
            //   410f92c0             | inc                 eax
            //   493bc9               | test                dh, 0x10

        $sequence_1 = { 8b4318 894718 488d5320 488d4f20 e8???????? 90 488d0558e20400 }
            // n = 7, score = 200
            //   8b4318               | inc                 ecx
            //   894718               | setb                al
            //   488d5320             | dec                 ebp
            //   488d4f20             | cmp                 edi, ebp
            //   e8????????           |                     
            //   90                   | dec                 esp
            //   488d0558e20400       | lea                 ebx, [edx + ecx]

        $sequence_2 = { 33d2 e8???????? e8???????? c70016000000 e8???????? eb2a 488b07 }
            // n = 7, score = 200
            //   33d2                 | mov                 eax, dword ptr [ebp + 0x48]
            //   e8????????           |                     
            //   e8????????           |                     
            //   c70016000000         | dec                 ebp
            //   e8????????           |                     
            //   eb2a                 | adc                 ebp, esp
            //   488b07               | dec                 esp

        $sequence_3 = { 3474 8845bf 8b4580 043c 498bd4 3465 8845c0 }
            // n = 7, score = 200
            //   3474                 | dec                 ecx
            //   8845bf               | mov                 eax, dword ptr [edx + edx]
            //   8b4580               | dec                 eax
            //   043c                 | mov                 dword ptr [edx], eax
            //   498bd4               | dec                 eax
            //   3465                 | lea                 edx, [edx - 8]
            //   8845c0               | dec                 ebp

        $sequence_4 = { 488d0da7350700 8b440101 8b4c2438 33c8 8bc1 89442438 8b442448 }
            // n = 7, score = 200
            //   488d0da7350700       | mov                 edi, 8
            //   8b440101             | dec                 eax
            //   8b4c2438             | mov                 eax, dword ptr [ecx + 0x10]
            //   33c8                 | dec                 eax
            //   8bc1                 | cmp                 dword ptr [ecx + 8], eax
            //   89442438             | cmovb               edx, edi
            //   8b442448             | inc                 eax

        $sequence_5 = { 660feb0d???????? 4c8d0d14fc0000 f20f5cca f2410f590cc1 660f28d1 660f28c1 4c8d0d0b3e0100 }
            // n = 7, score = 200
            //   660feb0d????????     |                     
            //   4c8d0d14fc0000       | mov                 dword ptr [esi + 8], eax
            //   f20f5cca             | dec                 eax
            //   f2410f590cc1         | mov                 dword ptr [esi + 0x90], ebp
            //   660f28d1             | dec                 eax
            //   660f28c1             | test                ebp, ebp
            //   4c8d0d0b3e0100       | je                  0x15d

        $sequence_6 = { 8b45d0 040e 3468 8845e2 8b45d0 040f 3465 }
            // n = 7, score = 200
            //   8b45d0               | dec                 eax
            //   040e                 | mov                 eax, dword ptr [eax + 0x70]
            //   3468                 | dec                 ebp
            //   8845e2               | adc                 ecx, eax
            //   8b45d0               | dec                 ecx
            //   040f                 | adc                 eax, 0
            //   3465                 | dec                 eax

        $sequence_7 = { 4883d300 488b00 49f76320 4c8d0c3b 4803c1 4c8bd2 483bc1 }
            // n = 7, score = 200
            //   4883d300             | mov                 eax, dword ptr [esp + 0x28]
            //   488b00               | mov                 ecx, eax
            //   49f76320             | dec                 eax
            //   4c8d0c3b             | mov                 edx, eax
            //   4803c1               | dec                 eax
            //   4c8bd2               | lea                 ecx, [edi + 8]
            //   483bc1               | dec                 esp

        $sequence_8 = { 90 c74424308c000000 90 803d????????00 750d e8???????? c605????????01 }
            // n = 7, score = 200
            //   90                   | adc                 esp, ecx
            //   c74424308c000000     | dec                 ecx
            //   90                   | mul                 dword ptr [ebx + 8]
            //   803d????????00       |                     
            //   750d                 | dec                 esp
            //   e8????????           |                     
            //   c605????????01       |                     

        $sequence_9 = { 4103c0 33cb 03c1 890424 4585db 743e }
            // n = 6, score = 200
            //   4103c0               | xor                 al, 0x65
            //   33cb                 | mov                 byte ptr [ebp - 0x15], al
            //   03c1                 | mov                 byte ptr [ebp - 0x15], al
            //   890424               | mov                 eax, dword ptr [ebp - 0x30]
            //   4585db               | add                 al, 0x18
            //   743e                 | xor                 al, 0x20

    condition:
        7 of them and filesize < 1163264
}