rule win_banatrix_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.banatrix."
        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.banatrix"
        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 = { c744240800000000 83c604 c744240401000000 893c24 }
            // n = 4, score = 200
            //   c744240800000000     | mov                 dword ptr [esp + 8], 0
            //   83c604               | add                 esi, 4
            //   c744240401000000     | mov                 dword ptr [esp + 4], 1
            //   893c24               | mov                 dword ptr [esp], edi

        $sequence_1 = { 73c1 8b55e4 894ddc 8b048a 01f8 89442404 }
            // n = 6, score = 200
            //   73c1                 | jae                 0xffffffc3
            //   8b55e4               | mov                 edx, dword ptr [ebp - 0x1c]
            //   894ddc               | mov                 dword ptr [ebp - 0x24], ecx
            //   8b048a               | mov                 eax, dword ptr [edx + ecx*4]
            //   01f8                 | add                 eax, edi
            //   89442404             | mov                 dword ptr [esp + 4], eax

        $sequence_2 = { 8b55c4 8b7508 8b4a10 037214 89c7 }
            // n = 5, score = 200
            //   8b55c4               | mov                 edx, dword ptr [ebp - 0x3c]
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8b4a10               | mov                 ecx, dword ptr [edx + 0x10]
            //   037214               | add                 esi, dword ptr [edx + 0x14]
            //   89c7                 | mov                 edi, eax

        $sequence_3 = { c744240806000000 893c24 c1e804 40 0fb7c0 }
            // n = 5, score = 200
            //   c744240806000000     | mov                 dword ptr [esp + 8], 6
            //   893c24               | mov                 dword ptr [esp], edi
            //   c1e804               | shr                 eax, 4
            //   40                   | inc                 eax
            //   0fb7c0               | movzx               eax, ax

        $sequence_4 = { 895c2408 c744240400000000 890424 e8???????? 83ec0c 8d65f8 }
            // n = 6, score = 200
            //   895c2408             | mov                 dword ptr [esp + 8], ebx
            //   c744240400000000     | mov                 dword ptr [esp + 4], 0
            //   890424               | mov                 dword ptr [esp], eax
            //   e8????????           |                     
            //   83ec0c               | sub                 esp, 0xc
            //   8d65f8               | lea                 esp, [ebp - 8]

        $sequence_5 = { c1e91e 83e702 83e101 01f9 01c9 034dcc }
            // n = 6, score = 200
            //   c1e91e               | shr                 ecx, 0x1e
            //   83e702               | and                 edi, 2
            //   83e101               | and                 ecx, 1
            //   01f9                 | add                 ecx, edi
            //   01c9                 | add                 ecx, ecx
            //   034dcc               | add                 ecx, dword ptr [ebp - 0x34]

        $sequence_6 = { ebb4 8b7dd0 03b880000000 897dcc 8b7dcc c744240414000000 }
            // n = 6, score = 200
            //   ebb4                 | jmp                 0xffffffb6
            //   8b7dd0               | mov                 edi, dword ptr [ebp - 0x30]
            //   03b880000000         | add                 edi, dword ptr [eax + 0x80]
            //   897dcc               | mov                 dword ptr [ebp - 0x34], edi
            //   8b7dcc               | mov                 edi, dword ptr [ebp - 0x34]
            //   c744240414000000     | mov                 dword ptr [esp + 4], 0x14

        $sequence_7 = { 8b45d4 01d0 8945d0 8b45cc d16dd0 8b4dd0 }
            // n = 6, score = 200
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   01d0                 | add                 eax, edx
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   8b45cc               | mov                 eax, dword ptr [ebp - 0x34]
            //   d16dd0               | shr                 dword ptr [ebp - 0x30], 1
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]

        $sequence_8 = { eb2c 0375d0 8975c8 eb24 8b4b20 894c2408 }
            // n = 6, score = 200
            //   eb2c                 | jmp                 0x2e
            //   0375d0               | add                 esi, dword ptr [ebp - 0x30]
            //   8975c8               | mov                 dword ptr [ebp - 0x38], esi
            //   eb24                 | jmp                 0x26
            //   8b4b20               | mov                 ecx, dword ptr [ebx + 0x20]
            //   894c2408             | mov                 dword ptr [esp + 8], ecx

        $sequence_9 = { 7514 0fb706 3b4314 7798 }
            // n = 4, score = 200
            //   7514                 | jne                 0x16
            //   0fb706               | movzx               eax, word ptr [esi]
            //   3b4314               | cmp                 eax, dword ptr [ebx + 0x14]
            //   7798                 | ja                  0xffffff9a

    condition:
        7 of them and filesize < 180224
}