rule win_lockfile_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 4c8d442440 c745d802000000 488d9520010000 0f2845d0 488d4c2460 660f7f442440 e8???????? }
            // n = 7, score = 200
            //   4c8d442440           | dec                 ecx
            //   c745d802000000       | cmp                 esi, ebp
            //   488d9520010000       | dec                 ecx
            //   0f2845d0             | adc                 esp, 0
            //   488d4c2460           | dec                 ecx
            //   660f7f442440         | mul                 dword ptr [edi + 0x38]
            //   e8????????           |                     

        $sequence_1 = { e8???????? eb2f ba10000000 488d0d4dd80400 e8???????? 4885c0 740e }
            // n = 7, score = 200
            //   e8????????           |                     
            //   eb2f                 | mov                 eax, dword ptr [ebp + 0x10]
            //   ba10000000           | add                 al, 0x1d
            //   488d0d4dd80400       | xor                 al, 0x65
            //   e8????????           |                     
            //   4885c0               | mov                 byte ptr [ebp + 0x31], al
            //   740e                 | mov                 eax, dword ptr [ebp + 0x10]

        $sequence_2 = { 480f42c8 488bfa 33c0 f3aa 488b8c2450010000 4833cc e8???????? }
            // n = 7, score = 200
            //   480f42c8             | lea                 eax, dword ptr [edx - 0x70e44324]
            //   488bfa               | xor                 esi, dword ptr [esp + 0xc]
            //   33c0                 | inc                 esp
            //   f3aa                 | add                 eax, ecx
            //   488b8c2450010000     | or                  ecx, eax
            //   4833cc               | xor                 esi, dword ptr [esp + 0xa8]
            //   e8????????           |                     

        $sequence_3 = { 4c0365bf 4b8d3427 4c8d1c37 4f8d0c1a 4b8d1408 488d0411 483bc1 }
            // n = 7, score = 200
            //   4c0365bf             | dec                 ecx
            //   4b8d3427             | adc                 edi, 0
            //   4c8d1c37             | dec                 eax
            //   4f8d0c1a             | mul                 dword ptr [ebx + 0x68]
            //   4b8d1408             | dec                 edi
            //   488d0411             | lea                 esi, dword ptr [esp + edi]
            //   483bc1               | dec                 eax

        $sequence_4 = { c685570100006e c6855801000022 c685590100002d c6855a01000021 c6855b01000029 c6855c0100006c c6855d0100006c }
            // n = 7, score = 200
            //   c685570100006e       | inc                 ecx
            //   c6855801000022       | mov                 ecx, 0x1a5
            //   c685590100002d       | jne                 0x1e7e
            //   c6855a01000021       | dec                 eax
            //   c6855b01000029       | mov                 eax, ecx
            //   c6855c0100006c       | inc                 ecx
            //   c6855d0100006c       | mov                 edx, 0xfff

        $sequence_5 = { 488d4c2420 8364242800 b260 488bd8 e8???????? 4c8bc3 488d542430 }
            // n = 7, score = 200
            //   488d4c2420           | cmp                 esi, edi
            //   8364242800           | dec                 ecx
            //   b260                 | adc                 esp, 0
            //   488bd8               | dec                 ebp
            //   e8????????           |                     
            //   4c8bc3               | shld                esp, ebx, 1
            //   488d542430           | dec                 ecx

        $sequence_6 = { 33d0 418bc6 c1c806 33d0 8bc7 4133c4 4123c6 }
            // n = 7, score = 200
            //   33d0                 | inc                 ecx
            //   418bc6               | xor                 ecx, edi
            //   c1c806               | and                 ecx, ebx
            //   33d0                 | inc                 edx
            //   8bc7                 | lea                 eax, dword ptr [edi + eax]
            //   4133c4               | inc                 ecx
            //   4123c6               | xor                 ecx, esp

        $sequence_7 = { 488b55e0 4885d2 7411 488bfa 33c0 f348ab 488bca }
            // n = 7, score = 200
            //   488b55e0             | lea                 ecx, dword ptr [ebx + eax]
            //   4885d2               | dec                 eax
            //   7411                 | cmp                 edi, esi
            //   488bfa               | dec                 ecx
            //   33c0                 | adc                 esi, 0
            //   f348ab               | dec                 ebp
            //   488bca               | cmp                 edi, ebp

        $sequence_8 = { 493bca 4913fe 4c0fa4c701 490fa4c001 4803c0 4c3bd8 498b4738 }
            // n = 7, score = 200
            //   493bca               | cmp                 byte ptr [ebp - 0x48], 1
            //   4913fe               | jg                  0x737
            //   4c0fa4c701           | dec                 eax
            //   490fa4c001           | mov                 ecx, edi
            //   4803c0               | dec                 eax
            //   4c3bd8               | lea                 ecx, dword ptr [ebp - 0x50]
            //   498b4738             | mov                 edx, 0xe

        $sequence_9 = { c7442438f0ffffff 33d2 c7442428f0ffffff 488d0560040000 8954243c 8954242c 488d5188 }
            // n = 7, score = 200
            //   c7442438f0ffffff     | dec                 ebp
            //   33d2                 | cmp                 esi, ebp
            //   c7442428f0ffffff     | je                  0x6a1
            //   488d0560040000       | cmp                 byte ptr [ebp + 0x7f], 0
            //   8954243c             | dec                 ebp
            //   8954242c             | mov                 esp, eax
            //   488d5188             | dec                 esp

    condition:
        7 of them and filesize < 1163264
}