rule win_lockfile_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 4d03e5 488bf2 4c8d0401 488b4720 4c3bc1 4883d600 49f76668 }
            // n = 7, score = 200
            //   4d03e5               | jb                  0x638
            //   488bf2               | dec                 eax
            //   4c8d0401             | mov                 dword ptr [esp + 0x40], ebp
            //   488b4720             | dec                 eax
            //   4c3bc1               | mov                 eax, ebx
            //   4883d600             | dec                 eax
            //   49f76668             | sub                 eax, edx

        $sequence_1 = { 4c8d442438 498bd7 488d4c2440 488b442440 ff9000010000 90 488d4c2440 }
            // n = 7, score = 200
            //   4c8d442438           | dec                 eax
            //   498bd7               | mov                 dword ptr [edx], eax
            //   488d4c2440           | dec                 eax
            //   488b442440           | cmp                 eax, ecx
            //   ff9000010000         | jbe                 0x453
            //   90                   | mov                 ebx, 1
            //   488d4c2440           | cmp                 edi, ebx

        $sequence_2 = { 4883d100 4c3bde 4c8b5d9f 4883d100 4d3bf7 4f8d040b }
            // n = 6, score = 200
            //   4883d100             | xor                 ecx, esi
            //   4c3bde               | xor                 ecx, edx
            //   4c8b5d9f             | add                 ebx, 0x6ed9eba1
            //   4883d100             | inc                 ecx
            //   4d3bf7               | ror                 eax, 2
            //   4f8d040b             | add                 eax, ebx

        $sequence_3 = { 498bc7 4c89442450 4889542428 488955d8 4c8945e8 66660f1f840000000000 4c8921 }
            // n = 7, score = 200
            //   498bc7               | dec                 eax
            //   4c89442450           | lea                 eax, [0x36eba]
            //   4889542428           | dec                 eax
            //   488955d8             | mov                 dword ptr [esp + 0x48], ebx
            //   4c8945e8             | dec                 eax
            //   66660f1f840000000000     | lea    ecx, [esp + 0x30]
            //   4c8921               | dec                 eax

        $sequence_4 = { 75f0 85ff 0f840d020000 3bcf 0f83d3000000 498bd7 488bcd }
            // n = 7, score = 200
            //   75f0                 | mov                 dword ptr [ebp + 0x60], eax
            //   85ff                 | xor                 edi, edi
            //   0f840d020000         | dec                 eax
            //   3bcf                 | mov                 dword ptr [ebp - 0x10], eax
            //   0f83d3000000         | inc                 ecx
            //   498bd7               | mov                 eax, 0x104
            //   488bcd               | dec                 eax

        $sequence_5 = { 488bdd 48c1fb02 488bd3 488d4c2428 e8???????? 4889442428 488d1c98 }
            // n = 7, score = 200
            //   488bdd               | dec                 ecx
            //   48c1fb02             | mov                 eax, dword ptr [edi]
            //   488bd3               | dec                 esp
            //   488d4c2428           | mov                 eax, dword ptr [ebp + 0x77]
            //   e8????????           |                     
            //   4889442428           | dec                 eax
            //   488d1c98             | add                 edx, dword ptr [esi + 8]

        $sequence_6 = { 418bcd 498b442420 49f721 4c8be2 4d8d0c00 4d3bc8 4d13e5 }
            // n = 7, score = 200
            //   418bcd               | inc                 ecx
            //   498b442420           | movups              xmm0, xmmword ptr [ecx + eax*8]
            //   49f721               | dec                 eax
            //   4c8be2               | lea                 edx, [0x1d003]
            //   4d8d0c00             | movsd               xmm2, qword ptr [edx + eax*8]
            //   4d3bc8               | addsd               xmm2, xmm5
            //   4d13e5               | subsd               xmm5, xmm1

        $sequence_7 = { 488bfa 33c0 f348ab 488bca e8???????? 90 4c8d45d8 }
            // n = 7, score = 200
            //   488bfa               | lea                 edx, [0x66039]
            //   33c0                 | dec                 eax
            //   f348ab               | mov                 ecx, ebx
            //   488bca               | mov                 byte ptr [ebx + 0xb], 0
            //   e8????????           |                     
            //   90                   | dec                 eax
            //   4c8d45d8             | lea                 eax, [esp + 0x30]

        $sequence_8 = { 4c3bfb 72d6 4c8bb42490000000 4c8bbc2480000000 488b742430 4c8bef 483bfb }
            // n = 7, score = 200
            //   4c3bfb               | mov                 ecx, dword ptr [esi + 8]
            //   72d6                 | dec                 eax
            //   4c8bb42490000000     | sub                 ecx, edi
            //   4c8bbc2480000000     | dec                 eax
            //   488b742430           | mov                 eax, ebx
            //   4c8bef               | dec                 eax
            //   483bfb               | imul                ecx

        $sequence_9 = { 0430 346c 88442474 8b442440 0431 3420 88442475 }
            // n = 7, score = 200
            //   0430                 | mov                 eax, dword ptr [esp + 0x40]
            //   346c                 | add                 al, 0x18
            //   88442474             | mov                 eax, dword ptr [esp + 0x40]
            //   8b442440             | add                 al, 0x17
            //   0431                 | xor                 al, 0x65
            //   3420                 | mov                 byte ptr [esp + 0x5b], al
            //   88442475             | mov                 eax, dword ptr [esp + 0x40]

    condition:
        7 of them and filesize < 1163264
}