rule win_findpos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.findpos."
        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.findpos"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 8945f4 57 85f6 7526 bf???????? 57 e8???????? }
            // n = 7, score = 100
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   57                   | push                edi
            //   85f6                 | test                esi, esi
            //   7526                 | jne                 0x28
            //   bf????????           |                     
            //   57                   | push                edi
            //   e8????????           |                     

        $sequence_1 = { 85c0 7905 0fb7c0 eb06 8b45ec 83c002 50 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7905                 | jns                 7
            //   0fb7c0               | movzx               eax, ax
            //   eb06                 | jmp                 8
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   83c002               | add                 eax, 2
            //   50                   | push                eax

        $sequence_2 = { 57 50 660f1345f0 8985e0feffff e8???????? 59 }
            // n = 6, score = 100
            //   57                   | push                edi
            //   50                   | push                eax
            //   660f1345f0           | movlpd              qword ptr [ebp - 0x10], xmm0
            //   8985e0feffff         | mov                 dword ptr [ebp - 0x120], eax
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_3 = { 8b15???????? 395a08 757a 807f0d00 7404 8bc6 }
            // n = 6, score = 100
            //   8b15????????         |                     
            //   395a08               | cmp                 dword ptr [edx + 8], ebx
            //   757a                 | jne                 0x7c
            //   807f0d00             | cmp                 byte ptr [edi + 0xd], 0
            //   7404                 | je                  6
            //   8bc6                 | mov                 eax, esi

        $sequence_4 = { e9???????? 8bc3 83e813 0f84b5000000 48 747a 83e807 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8bc3                 | mov                 eax, ebx
            //   83e813               | sub                 eax, 0x13
            //   0f84b5000000         | je                  0xbb
            //   48                   | dec                 eax
            //   747a                 | je                  0x7c
            //   83e807               | sub                 eax, 7

        $sequence_5 = { 8b4df8 33c0 2b75fc 40 8931 }
            // n = 5, score = 100
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   33c0                 | xor                 eax, eax
            //   2b75fc               | sub                 esi, dword ptr [ebp - 4]
            //   40                   | inc                 eax
            //   8931                 | mov                 dword ptr [ecx], esi

        $sequence_6 = { 8b7d0c 85ff 743d bb???????? 8d55f8 52 }
            // n = 6, score = 100
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]
            //   85ff                 | test                edi, edi
            //   743d                 | je                  0x3f
            //   bb????????           |                     
            //   8d55f8               | lea                 edx, [ebp - 8]
            //   52                   | push                edx

        $sequence_7 = { 53 e8???????? 59 8b45f4 03c3 }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   03c3                 | add                 eax, ebx

        $sequence_8 = { 3375f0 337df4 8b4008 8985dcfeffff 85c0 75ce 89b5dcfeffff }
            // n = 7, score = 100
            //   3375f0               | xor                 esi, dword ptr [ebp - 0x10]
            //   337df4               | xor                 edi, dword ptr [ebp - 0xc]
            //   8b4008               | mov                 eax, dword ptr [eax + 8]
            //   8985dcfeffff         | mov                 dword ptr [ebp - 0x124], eax
            //   85c0                 | test                eax, eax
            //   75ce                 | jne                 0xffffffd0
            //   89b5dcfeffff         | mov                 dword ptr [ebp - 0x124], esi

        $sequence_9 = { 33c9 8d5701 85d2 7e13 0fb6440df8 8a8030854100 8806 }
            // n = 7, score = 100
            //   33c9                 | xor                 ecx, ecx
            //   8d5701               | lea                 edx, [edi + 1]
            //   85d2                 | test                edx, edx
            //   7e13                 | jle                 0x15
            //   0fb6440df8           | movzx               eax, byte ptr [ebp + ecx - 8]
            //   8a8030854100         | mov                 al, byte ptr [eax + 0x418530]
            //   8806                 | mov                 byte ptr [esi], al

    condition:
        7 of them and filesize < 286720
}