rule win_lock_pos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "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 = { 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 = { 6a00 6a23 6a00 ff15???????? 8d8df8fdffff }
            // n = 5, score = 300
            //   6a00                 | push                0
            //   6a23                 | push                0x23
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8d8df8fdffff         | lea                 ecx, dword ptr [ebp - 0x208]

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

        $sequence_5 = { 33c9 8945e8 894dec 8b552c }
            // n = 4, score = 200
            //   33c9                 | xor                 ecx, ecx
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   8b552c               | mov                 edx, dword ptr [ebp + 0x2c]

        $sequence_6 = { 7406 837d0c00 7502 eb61 c745fc00000000 eb09 }
            // n = 6, score = 200
            //   7406                 | je                  8
            //   837d0c00             | cmp                 dword ptr [ebp + 0xc], 0
            //   7502                 | jne                 4
            //   eb61                 | jmp                 0x63
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   eb09                 | jmp                 0xb

        $sequence_7 = { 0fb75106 8955ec 8b45ec 8b4dec 83e901 }
            // n = 5, score = 200
            //   0fb75106             | movzx               edx, word ptr [ecx + 6]
            //   8955ec               | mov                 dword ptr [ebp - 0x14], edx
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   83e901               | sub                 ecx, 1

        $sequence_8 = { 83f8ff 7509 8bcf e8???????? c9 c3 33c9 }
            // n = 7, score = 200
            //   83f8ff               | cmp                 eax, -1
            //   7509                 | jne                 0xb
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   c9                   | leave               
            //   c3                   | ret                 
            //   33c9                 | xor                 ecx, ecx

        $sequence_9 = { 837d0800 56 57 0f848e000000 837d0c00 0f8484000000 ff750c }
            // n = 7, score = 200
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   56                   | push                esi
            //   57                   | push                edi
            //   0f848e000000         | je                  0x94
            //   837d0c00             | cmp                 dword ptr [ebp + 0xc], 0
            //   0f8484000000         | je                  0x8a
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_10 = { 6a06 e8???????? 50 e8???????? 83c40c 8be5 }
            // n = 6, score = 200
            //   6a06                 | push                6
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8be5                 | mov                 esp, ebp

        $sequence_11 = { c686a000000001 8b4518 56 e8???????? 59 c645fe01 5e }
            // n = 7, score = 200
            //   c686a000000001       | mov                 byte ptr [esi + 0xa0], 1
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   c645fe01             | mov                 byte ptr [ebp - 2], 1
            //   5e                   | pop                 esi

        $sequence_12 = { 6a00 6a00 6a00 6a04 8b95f4fdffff 52 ff15???????? }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a04                 | push                4
            //   8b95f4fdffff         | mov                 edx, dword ptr [ebp - 0x20c]
            //   52                   | push                edx
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 319488
}