rule win_blacksoul_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.blacksoul."
        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.blacksoul"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 50 8d4da8 e8???????? 8d45c0 c645fc02 50 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   8d4da8               | lea                 ecx, [ebp - 0x58]
            //   e8????????           |                     
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   50                   | push                eax

        $sequence_1 = { 58 ebef 56 8bf1 8d4e28 }
            // n = 5, score = 200
            //   58                   | pop                 eax
            //   ebef                 | jmp                 0xfffffff1
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   8d4e28               | lea                 ecx, [esi + 0x28]

        $sequence_2 = { b8???????? e8???????? 83ec0c 56 8bf1 57 6a18 }
            // n = 7, score = 200
            //   b8????????           |                     
            //   e8????????           |                     
            //   83ec0c               | sub                 esp, 0xc
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   57                   | push                edi
            //   6a18                 | push                0x18

        $sequence_3 = { c21400 55 8bec 8b4508 83781408 8b5010 7202 }
            // n = 7, score = 200
            //   c21400               | ret                 0x14
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   83781408             | cmp                 dword ptr [eax + 0x14], 8
            //   8b5010               | mov                 edx, dword ptr [eax + 0x10]
            //   7202                 | jb                  4

        $sequence_4 = { c20c00 807f4a00 7418 8b7508 8d4f28 51 }
            // n = 6, score = 200
            //   c20c00               | ret                 0xc
            //   807f4a00             | cmp                 byte ptr [edi + 0x4a], 0
            //   7418                 | je                  0x1a
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8d4f28               | lea                 ecx, [edi + 0x28]
            //   51                   | push                ecx

        $sequence_5 = { 46 41 894d9c 8bcb }
            // n = 4, score = 200
            //   46                   | inc                 esi
            //   41                   | inc                 ecx
            //   894d9c               | mov                 dword ptr [ebp - 0x64], ecx
            //   8bcb                 | mov                 ecx, ebx

        $sequence_6 = { 895dfc 895dc8 894dcc 668945b8 c645fc01 }
            // n = 5, score = 200
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   895dc8               | mov                 dword ptr [ebp - 0x38], ebx
            //   894dcc               | mov                 dword ptr [ebp - 0x34], ecx
            //   668945b8             | mov                 word ptr [ebp - 0x48], ax
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1

        $sequence_7 = { 8845a3 884590 8845a1 e8???????? 59 59 }
            // n = 6, score = 200
            //   8845a3               | mov                 byte ptr [ebp - 0x5d], al
            //   884590               | mov                 byte ptr [ebp - 0x70], al
            //   8845a1               | mov                 byte ptr [ebp - 0x5f], al
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_8 = { 59 59 84c0 0f841d010000 807b0400 }
            // n = 5, score = 200
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   84c0                 | test                al, al
            //   0f841d010000         | je                  0x123
            //   807b0400             | cmp                 byte ptr [ebx + 4], 0

        $sequence_9 = { 7408 80f939 7510 c60730 8b857cffffff 4f }
            // n = 6, score = 200
            //   7408                 | je                  0xa
            //   80f939               | cmp                 cl, 0x39
            //   7510                 | jne                 0x12
            //   c60730               | mov                 byte ptr [edi], 0x30
            //   8b857cffffff         | mov                 eax, dword ptr [ebp - 0x84]
            //   4f                   | dec                 edi

    condition:
        7 of them and filesize < 1823640
}