rule win_blacksuit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.blacksuit."
        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.blacksuit"
        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 = { ff742414 e8???????? 8b6c241c 83c404 }
            // n = 4, score = 200
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   e8????????           |                     
            //   8b6c241c             | mov                 ebp, dword ptr [esp + 0x1c]
            //   83c404               | add                 esp, 4

        $sequence_1 = { 8d4aca e8???????? 83c408 57 }
            // n = 4, score = 100
            //   8d4aca               | lea                 ecx, [edx - 0x36]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   57                   | push                edi

        $sequence_2 = { 8d4acd e8???????? 83c408 8d4c2427 }
            // n = 4, score = 100
            //   8d4acd               | lea                 ecx, [edx - 0x33]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8d4c2427             | lea                 ecx, [esp + 0x27]

        $sequence_3 = { e8???????? 8bf0 83c40c 89742414 85f6 752e }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c40c               | add                 esp, 0xc
            //   89742414             | mov                 dword ptr [esp + 0x14], esi
            //   85f6                 | test                esi, esi
            //   752e                 | jne                 0x30

        $sequence_4 = { 8d4ad0 e8???????? 83c408 8d8d98000000 }
            // n = 4, score = 100
            //   8d4ad0               | lea                 ecx, [edx - 0x30]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8d8d98000000         | lea                 ecx, [ebp + 0x98]

        $sequence_5 = { e8???????? 8bf0 83c404 85f6 0f8454050000 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c404               | add                 esp, 4
            //   85f6                 | test                esi, esi
            //   0f8454050000         | je                  0x55a

        $sequence_6 = { e8???????? 8bf0 83c40c 33ed 85f6 7531 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c40c               | add                 esp, 0xc
            //   33ed                 | xor                 ebp, ebp
            //   85f6                 | test                esi, esi
            //   7531                 | jne                 0x33

        $sequence_7 = { e8???????? 8bf0 83c408 837e0800 0f85cb010000 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   837e0800             | cmp                 dword ptr [esi + 8], 0
            //   0f85cb010000         | jne                 0x1d1

        $sequence_8 = { 8d4acf e8???????? 83c408 56 }
            // n = 4, score = 100
            //   8d4acf               | lea                 ecx, [edx - 0x31]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   56                   | push                esi

        $sequence_9 = { e8???????? 8bf0 83c40c 85f6 0f8408020000 837c241000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c40c               | add                 esp, 0xc
            //   85f6                 | test                esi, esi
            //   0f8408020000         | je                  0x20e
            //   837c241000           | cmp                 dword ptr [esp + 0x10], 0

        $sequence_10 = { e8???????? 8bf0 83c40c 8937 85f6 7532 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c40c               | add                 esp, 0xc
            //   8937                 | mov                 dword ptr [edi], esi
            //   85f6                 | test                esi, esi
            //   7532                 | jne                 0x34

        $sequence_11 = { 8d4ad5 57 68e8250000 684365e2df }
            // n = 4, score = 100
            //   8d4ad5               | lea                 ecx, [edx - 0x2b]
            //   57                   | push                edi
            //   68e8250000           | push                0x25e8
            //   684365e2df           | push                0xdfe26543

        $sequence_12 = { 8d4ac8 e8???????? 8d4c2419 51 8d8c24dc000000 51 }
            // n = 6, score = 100
            //   8d4ac8               | lea                 ecx, [edx - 0x38]
            //   e8????????           |                     
            //   8d4c2419             | lea                 ecx, [esp + 0x19]
            //   51                   | push                ecx
            //   8d8c24dc000000       | lea                 ecx, [esp + 0xdc]
            //   51                   | push                ecx

        $sequence_13 = { 8d4ad3 e8???????? 83c408 8d4c2410 }
            // n = 4, score = 100
            //   8d4ad3               | lea                 ecx, [edx - 0x2d]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8d4c2410             | lea                 ecx, [esp + 0x10]

        $sequence_14 = { e8???????? 8bf0 83c40c 8974240c 85f6 752d }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c40c               | add                 esp, 0xc
            //   8974240c             | mov                 dword ptr [esp + 0xc], esi
            //   85f6                 | test                esi, esi
            //   752d                 | jne                 0x2f

    condition:
        7 of them and filesize < 4764672
}