rule win_matrix_banker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.matrix_banker."
        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.matrix_banker"
        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 = { eb0b 8d4abf 80f905 7703 80c2c9 }
            // n = 5, score = 900
            //   eb0b                 | movsx               eax, byte ptr [eax + 0x41]
            //   8d4abf               | dec                 ecx
            //   80f905               | movsx               ecx, byte ptr [eax + 0x40]
            //   7703                 | mov                 byte ptr [ebx - 1], cl
            //   80c2c9               | dec                 eax

        $sequence_1 = { 8d489f 80f905 7704 04a9 eb0a }
            // n = 5, score = 900
            //   8d489f               | push                0
            //   80f905               | push                eax
            //   7704                 | mov                 dword ptr [ebp - 0x21c], edx
            //   04a9                 | mov                 dword ptr [ebp - 0x210], 0x10000
            //   eb0a                 | push                0

        $sequence_2 = { eb0a 8d48bf 80f905 7702 04c9 8d4ad0 80f909 }
            // n = 7, score = 900
            //   eb0a                 | cmp                 edx, 0x100
            //   8d48bf               | jae                 0xc7a
            //   80f905               | mov                 al, byte ptr [edi + 0x4b44708]
            //   7702                 | je                  0xc9a
            //   04c9                 | movzx               edx, byte ptr [ecx]
            //   8d4ad0               | movzx               eax, al
            //   80f909               | jmp                 0xc8e

        $sequence_3 = { eb16 8d489f 80f905 7704 }
            // n = 4, score = 900
            //   eb16                 | mov                 esi, dword ptr [ebp - 0x50]
            //   8d489f               | push                eax
            //   80f905               | mov                 ecx, dword ptr [edi]
            //   7704                 | jmp                 0x11b2

        $sequence_4 = { ff15???????? e8???????? 85c0 740a e8???????? 83f8ff }
            // n = 6, score = 900
            //   ff15????????         |                     
            //   e8????????           |                     
            //   85c0                 | add                 esp, 4
            //   740a                 | mov                 byte ptr [ebp - 4], 6
            //   e8????????           |                     
            //   83f8ff               | cmp                 dword ptr [ebp - 0x68], 0x10

        $sequence_5 = { 721e 8125????????fffdffff 8125????????fffdffff 8125????????fffdffff }
            // n = 4, score = 900
            //   721e                 | dec                 eax
            //   8125????????fffdffff     |     
            //   8125????????fffdffff     |     
            //   8125????????fffdffff     |     

        $sequence_6 = { 7702 04c9 8d4ad0 80f909 }
            // n = 4, score = 900
            //   7702                 | mov                 eax, esi
            //   04c9                 | dec                 ecx
            //   8d4ad0               | mov                 edx, edi
            //   80f909               | inc                 ecx

        $sequence_7 = { 8d489f 80f905 7704 04a9 eb0a 8d48bf 80f905 }
            // n = 7, score = 900
            //   8d489f               | lea                 eax, [ebp - 0x20]
            //   80f905               | push                eax
            //   7704                 | push                0x40
            //   04a9                 | push                edx
            //   eb0a                 | push                eax
            //   8d48bf               | mov                 ecx, dword ptr [eax]
            //   80f905               | call                dword ptr [ecx + 0x30]

        $sequence_8 = { 7704 04a9 eb0a 8d48bf 80f905 7702 04c9 }
            // n = 7, score = 900
            //   7704                 | dec                 eax
            //   04a9                 | cmp                 edx, ebp
            //   eb0a                 | jb                  0x1b41
            //   8d48bf               | dec                 esp
            //   80f905               | add                 eax, ebp
            //   7702                 | dec                 ecx
            //   04c9                 | cmp                 edx, eax

        $sequence_9 = { 8d48bf 80f905 7702 04c9 }
            // n = 4, score = 900
            //   8d48bf               | dec                 esp
            //   80f905               | lea                 esi, [0x164e9]
            //   7702                 | dec                 ecx
            //   04c9                 | cmp                 ebx, esi

    condition:
        7 of them and filesize < 422912
}