rule win_lock_pos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "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 = { 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 = { 55 8bec 81eca4040000 56 }
            // n = 4, score = 300
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81eca4040000         | sub                 esp, 0x4a4
            //   56                   | push                esi

        $sequence_3 = { 6a23 6a00 ff15???????? 8d8df8fdffff }
            // n = 4, score = 300
            //   6a23                 | push                0x23
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8d8df8fdffff         | lea                 ecx, [ebp - 0x208]

        $sequence_4 = { 8d85f8fdffff 50 6a00 6a00 6a23 6a00 }
            // n = 6, score = 300
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a23                 | push                0x23
            //   6a00                 | push                0

        $sequence_5 = { ff15???????? 89858cfbffff 83bd8cfbffffff 0f8497000000 c78588fbffff00000000 6aff }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   89858cfbffff         | mov                 dword ptr [ebp - 0x474], eax
            //   83bd8cfbffffff       | cmp                 dword ptr [ebp - 0x474], -1
            //   0f8497000000         | je                  0x9d
            //   c78588fbffff00000000     | mov    dword ptr [ebp - 0x478], 0
            //   6aff                 | push                -1

        $sequence_6 = { 52 e8???????? 83c40c 8945f8 8955fc 837d1004 7639 }
            // n = 7, score = 200
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   837d1004             | cmp                 dword ptr [ebp + 0x10], 4
            //   7639                 | jbe                 0x3b

        $sequence_7 = { 7707 32c0 e9???????? c745f800000000 6a04 8b4508 50 }
            // n = 7, score = 200
            //   7707                 | ja                  9
            //   32c0                 | xor                 al, al
            //   e9????????           |                     
            //   c745f800000000       | mov                 dword ptr [ebp - 8], 0
            //   6a04                 | push                4
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   50                   | push                eax

        $sequence_8 = { 8985f8fdffff 83bdf8fdffffff 0f8483000000 6a00 6a00 6a00 6802000001 }
            // n = 7, score = 200
            //   8985f8fdffff         | mov                 dword ptr [ebp - 0x208], eax
            //   83bdf8fdffffff       | cmp                 dword ptr [ebp - 0x208], -1
            //   0f8483000000         | je                  0x89
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6802000001           | push                0x1000002

        $sequence_9 = { 33ff eb10 0fb731 83c6d0 6683fe09 }
            // n = 5, score = 200
            //   33ff                 | xor                 edi, edi
            //   eb10                 | jmp                 0x12
            //   0fb731               | movzx               esi, word ptr [ecx]
            //   83c6d0               | add                 esi, -0x30
            //   6683fe09             | cmp                 si, 9

        $sequence_10 = { 53 33db 56 57 885dff 895df0 }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   885dff               | mov                 byte ptr [ebp - 1], bl
            //   895df0               | mov                 dword ptr [ebp - 0x10], ebx

        $sequence_11 = { e8???????? 84c0 0f849a000000 8935???????? 3bf7 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   0f849a000000         | je                  0xa0
            //   8935????????         |                     
            //   3bf7                 | cmp                 esi, edi

        $sequence_12 = { 662310 0fb7ca 8b55d4 81e2ffff0000 }
            // n = 4, score = 200
            //   662310               | and                 dx, word ptr [eax]
            //   0fb7ca               | movzx               ecx, dx
            //   8b55d4               | mov                 edx, dword ptr [ebp - 0x2c]
            //   81e2ffff0000         | and                 edx, 0xffff

    condition:
        7 of them and filesize < 319488
}