rule win_babar_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.babar."
        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.babar"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 3bd6 7503 8d5014 895010 8931 8b4810 8931 }
            // n = 7, score = 400
            //   3bd6                 | cmp                 edx, esi
            //   7503                 | jne                 5
            //   8d5014               | lea                 edx, [eax + 0x14]
            //   895010               | mov                 dword ptr [eax + 0x10], edx
            //   8931                 | mov                 dword ptr [ecx], esi
            //   8b4810               | mov                 ecx, dword ptr [eax + 0x10]
            //   8931                 | mov                 dword ptr [ecx], esi

        $sequence_1 = { 46 e8???????? 0137 2933 33c0 }
            // n = 5, score = 400
            //   46                   | inc                 esi
            //   e8????????           |                     
            //   0137                 | add                 dword ptr [edi], esi
            //   2933                 | sub                 dword ptr [ebx], esi
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 3bd7 7305 e8???????? 8bd0 2bd1 8d0c3a }
            // n = 6, score = 400
            //   3bd7                 | cmp                 edx, edi
            //   7305                 | jae                 7
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   2bd1                 | sub                 edx, ecx
            //   8d0c3a               | lea                 ecx, [edx + edi]

        $sequence_3 = { 3bd7 7215 7704 3bc3 }
            // n = 4, score = 400
            //   3bd7                 | cmp                 edx, edi
            //   7215                 | jb                  0x17
            //   7704                 | ja                  6
            //   3bc3                 | cmp                 eax, ebx

        $sequence_4 = { 3bd7 7305 e8???????? 03c7 3bd8 0f83be000000 }
            // n = 6, score = 400
            //   3bd7                 | cmp                 edx, edi
            //   7305                 | jae                 7
            //   e8????????           |                     
            //   03c7                 | add                 eax, edi
            //   3bd8                 | cmp                 ebx, eax
            //   0f83be000000         | jae                 0xc4

        $sequence_5 = { 3bd6 7505 8d55d8 eb16 }
            // n = 4, score = 400
            //   3bd6                 | cmp                 edx, esi
            //   7505                 | jne                 7
            //   8d55d8               | lea                 edx, [ebp - 0x28]
            //   eb16                 | jmp                 0x18

        $sequence_6 = { 3bd7 0f8440010000 397e14 0f8437010000 }
            // n = 4, score = 400
            //   3bd7                 | cmp                 edx, edi
            //   0f8440010000         | je                  0x146
            //   397e14               | cmp                 dword ptr [esi + 0x14], edi
            //   0f8437010000         | je                  0x13d

        $sequence_7 = { 3bd6 7505 8d55e0 eb16 }
            // n = 4, score = 400
            //   3bd6                 | cmp                 edx, esi
            //   7505                 | jne                 7
            //   8d55e0               | lea                 edx, [ebp - 0x20]
            //   eb16                 | jmp                 0x18

        $sequence_8 = { 8906 7518 5f 5e 5b }
            // n = 5, score = 200
            //   8906                 | mov                 dword ptr [esi], eax
            //   7518                 | jne                 0x1a
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_9 = { a1???????? 83c414 85c0 7432 50 ff15???????? 8d443001 }
            // n = 7, score = 200
            //   a1????????           |                     
            //   83c414               | add                 esp, 0x14
            //   85c0                 | test                eax, eax
            //   7432                 | je                  0x34
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d443001             | lea                 eax, [eax + esi + 1]

        $sequence_10 = { 5d 33c0 5b 83c414 c3 6a00 6a00 }
            // n = 7, score = 200
            //   5d                   | pop                 ebp
            //   33c0                 | xor                 eax, eax
            //   5b                   | pop                 ebx
            //   83c414               | add                 esp, 0x14
            //   c3                   | ret                 
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_11 = { 83c414 85ff 752d 6a0c e8???????? 68???????? 8bf0 }
            // n = 7, score = 200
            //   83c414               | add                 esp, 0x14
            //   85ff                 | test                edi, edi
            //   752d                 | jne                 0x2f
            //   6a0c                 | push                0xc
            //   e8????????           |                     
            //   68????????           |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_12 = { 03fe e8???????? 8bd8 83c408 85db 0f84a8000000 3bdf }
            // n = 7, score = 200
            //   03fe                 | add                 edi, esi
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   83c408               | add                 esp, 8
            //   85db                 | test                ebx, ebx
            //   0f84a8000000         | je                  0xae
            //   3bdf                 | cmp                 ebx, edi

        $sequence_13 = { 6801000080 e8???????? 8d442424 50 8d4c242c 51 53 }
            // n = 7, score = 200
            //   6801000080           | push                0x80000001
            //   e8????????           |                     
            //   8d442424             | lea                 eax, [esp + 0x24]
            //   50                   | push                eax
            //   8d4c242c             | lea                 ecx, [esp + 0x2c]
            //   51                   | push                ecx
            //   53                   | push                ebx

        $sequence_14 = { b801000000 83c408 c3 8b0c24 53 }
            // n = 5, score = 200
            //   b801000000           | mov                 eax, 1
            //   83c408               | add                 esp, 8
            //   c3                   | ret                 
            //   8b0c24               | mov                 ecx, dword ptr [esp]
            //   53                   | push                ebx

        $sequence_15 = { 59 5e c3 56 57 33f6 ff74240c }
            // n = 7, score = 200
            //   59                   | pop                 ecx
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   56                   | push                esi
            //   57                   | push                edi
            //   33f6                 | xor                 esi, esi
            //   ff74240c             | push                dword ptr [esp + 0xc]

    condition:
        7 of them and filesize < 1294336
}