rule win_findpos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "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 = { 8bc8 890d???????? 85c9 743b 8b45f8 a3???????? }
            // n = 6, score = 100
            //   8bc8                 | mov                 ecx, eax
            //   890d????????         |                     
            //   85c9                 | test                ecx, ecx
            //   743b                 | je                  0x3d
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   a3????????           |                     

        $sequence_1 = { eb02 8bcb e8???????? 33f6 46 53 85c0 }
            // n = 7, score = 100
            //   eb02                 | jmp                 4
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   33f6                 | xor                 esi, esi
            //   46                   | inc                 esi
            //   53                   | push                ebx
            //   85c0                 | test                eax, eax

        $sequence_2 = { 51 50 ff75e4 8d45e8 50 e8???????? 8b00 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   50                   | push                eax
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_3 = { 7405 e8???????? dbe2 5d c3 b8???????? c705????????499b4000 }
            // n = 7, score = 100
            //   7405                 | je                  7
            //   e8????????           |                     
            //   dbe2                 | fnclex              
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   b8????????           |                     
            //   c705????????499b4000     |     

        $sequence_4 = { ff15???????? 85c0 7477 8d45ec }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7477                 | je                  0x79
            //   8d45ec               | lea                 eax, [ebp - 0x14]

        $sequence_5 = { 8b750c 8d4de8 8975e8 e8???????? 8b00 3b05???????? 7416 }
            // n = 7, score = 100
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   8d4de8               | lea                 ecx, [ebp - 0x18]
            //   8975e8               | mov                 dword ptr [ebp - 0x18], esi
            //   e8????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   3b05????????         |                     
            //   7416                 | je                  0x18

        $sequence_6 = { 7411 8b45e8 53 8b4808 51 80790d00 7495 }
            // n = 7, score = 100
            //   7411                 | je                  0x13
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   53                   | push                ebx
            //   8b4808               | mov                 ecx, dword ptr [eax + 8]
            //   51                   | push                ecx
            //   80790d00             | cmp                 byte ptr [ecx + 0xd], 0
            //   7495                 | je                  0xffffff97

        $sequence_7 = { 0f43ca c6041900 5b 5f b8???????? 5e 5d }
            // n = 7, score = 100
            //   0f43ca               | cmovae              ecx, edx
            //   c6041900             | mov                 byte ptr [ecx + ebx], 0
            //   5b                   | pop                 ebx
            //   5f                   | pop                 edi
            //   b8????????           |                     
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp

        $sequence_8 = { 8bf0 83feff 7479 8b85f0efffff 89bdf8efffff 8bdf 89bdf4efffff }
            // n = 7, score = 100
            //   8bf0                 | mov                 esi, eax
            //   83feff               | cmp                 esi, -1
            //   7479                 | je                  0x7b
            //   8b85f0efffff         | mov                 eax, dword ptr [ebp - 0x1010]
            //   89bdf8efffff         | mov                 dword ptr [ebp - 0x1008], edi
            //   8bdf                 | mov                 ebx, edi
            //   89bdf4efffff         | mov                 dword ptr [ebp - 0x100c], edi

        $sequence_9 = { 8b4014 894df0 8945fc 85c9 742f 0fbf047a }
            // n = 6, score = 100
            //   8b4014               | mov                 eax, dword ptr [eax + 0x14]
            //   894df0               | mov                 dword ptr [ebp - 0x10], ecx
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   85c9                 | test                ecx, ecx
            //   742f                 | je                  0x31
            //   0fbf047a             | movsx               eax, word ptr [edx + edi*2]

    condition:
        7 of them and filesize < 286720
}