rule win_selfmake_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.selfmake."
        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.selfmake"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 8b34b2 eb06 33c9 ebe4 8bf1 85f6 756a }
            // n = 7, score = 400
            //   8b34b2               | mov                 esi, dword ptr [edx + esi*4]
            //   eb06                 | jmp                 8
            //   33c9                 | xor                 ecx, ecx
            //   ebe4                 | jmp                 0xffffffe6
            //   8bf1                 | mov                 esi, ecx
            //   85f6                 | test                esi, esi
            //   756a                 | jne                 0x6c

        $sequence_1 = { 8b4c2470 57 50 51 }
            // n = 4, score = 400
            //   8b4c2470             | mov                 ecx, dword ptr [esp + 0x70]
            //   57                   | push                edi
            //   50                   | push                eax
            //   51                   | push                ecx

        $sequence_2 = { ebe4 8bf1 85f6 756a 85db }
            // n = 5, score = 400
            //   ebe4                 | jmp                 0xffffffe6
            //   8bf1                 | mov                 esi, ecx
            //   85f6                 | test                esi, esi
            //   756a                 | jne                 0x6c
            //   85db                 | test                ebx, ebx

        $sequence_3 = { 833d????????00 740a 8d45f8 50 ff15???????? 833d????????00 740e }
            // n = 7, score = 400
            //   833d????????00       |                     
            //   740a                 | je                  0xc
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   833d????????00       |                     
            //   740e                 | je                  0x10

        $sequence_4 = { 7d1b 8b15???????? 52 ff15???????? c705????????00000000 33c0 }
            // n = 6, score = 400
            //   7d1b                 | jge                 0x1d
            //   8b15????????         |                     
            //   52                   | push                edx
            //   ff15????????         |                     
            //   c705????????00000000     |     
            //   33c0                 | xor                 eax, eax

        $sequence_5 = { 8b4b2c 6a00 6a01 51 ffd0 8b16 83c604 }
            // n = 7, score = 400
            //   8b4b2c               | mov                 ecx, dword ptr [ebx + 0x2c]
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   51                   | push                ecx
            //   ffd0                 | call                eax
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   83c604               | add                 esi, 4

        $sequence_6 = { b801000000 5f 59 c3 8b7f1c 57 68???????? }
            // n = 7, score = 400
            //   b801000000           | mov                 eax, 1
            //   5f                   | pop                 edi
            //   59                   | pop                 ecx
            //   c3                   | ret                 
            //   8b7f1c               | mov                 edi, dword ptr [edi + 0x1c]
            //   57                   | push                edi
            //   68????????           |                     

        $sequence_7 = { 8b4250 8d4c2410 51 8b4e1c 6a40 40 50 }
            // n = 7, score = 400
            //   8b4250               | mov                 eax, dword ptr [edx + 0x50]
            //   8d4c2410             | lea                 ecx, [esp + 0x10]
            //   51                   | push                ecx
            //   8b4e1c               | mov                 ecx, dword ptr [esi + 0x1c]
            //   6a40                 | push                0x40
            //   40                   | inc                 eax
            //   50                   | push                eax

        $sequence_8 = { eb4c 833d????????00 7410 6a00 6a00 a1???????? }
            // n = 6, score = 400
            //   eb4c                 | jmp                 0x4e
            //   833d????????00       |                     
            //   7410                 | je                  0x12
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   a1????????           |                     

        $sequence_9 = { 8d4e04 8b5614 2bd7 52 8b542410 03d7 }
            // n = 6, score = 400
            //   8d4e04               | lea                 ecx, [esi + 4]
            //   8b5614               | mov                 edx, dword ptr [esi + 0x14]
            //   2bd7                 | sub                 edx, edi
            //   52                   | push                edx
            //   8b542410             | mov                 edx, dword ptr [esp + 0x10]
            //   03d7                 | add                 edx, edi

    condition:
        7 of them and filesize < 932864
}