rule win_bredolab_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.bredolab."
        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.bredolab"
        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 = { ebe8 55 89e5 53 83ec14 8b5d08 c7042410270000 }
            // n = 7, score = 200
            //   ebe8                 | jmp                 0xffffffea
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   53                   | push                ebx
            //   83ec14               | sub                 esp, 0x14
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   c7042410270000       | mov                 dword ptr [esp], 0x2710

        $sequence_1 = { 895c2404 8b5d0c 891c24 ff15???????? 83ec10 }
            // n = 5, score = 200
            //   895c2404             | mov                 dword ptr [esp + 4], ebx
            //   8b5d0c               | mov                 ebx, dword ptr [ebp + 0xc]
            //   891c24               | mov                 dword ptr [esp], ebx
            //   ff15????????         |                     
            //   83ec10               | sub                 esp, 0x10

        $sequence_2 = { 890424 ffd1 52 eb87 }
            // n = 4, score = 200
            //   890424               | mov                 dword ptr [esp], eax
            //   ffd1                 | call                ecx
            //   52                   | push                edx
            //   eb87                 | jmp                 0xffffff89

        $sequence_3 = { 56 80bba012000000 7576 c605????????01 8b85e4f7ffff c68405e8f7ffff00 85c0 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   80bba012000000       | cmp                 byte ptr [ebx + 0x12a0], 0
            //   7576                 | jne                 0x78
            //   c605????????01       |                     
            //   8b85e4f7ffff         | mov                 eax, dword ptr [ebp - 0x81c]
            //   c68405e8f7ffff00     | mov                 byte ptr [ebp + eax - 0x818], 0
            //   85c0                 | test                eax, eax

        $sequence_4 = { 8d9c1b00000080 8d7de4 897c2410 c744240c3f000f00 c744240800000000 89742404 }
            // n = 6, score = 200
            //   8d9c1b00000080       | lea                 ebx, [ebx + ebx - 0x80000000]
            //   8d7de4               | lea                 edi, [ebp - 0x1c]
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi
            //   c744240c3f000f00     | mov                 dword ptr [esp + 0xc], 0xf003f
            //   c744240800000000     | mov                 dword ptr [esp + 8], 0
            //   89742404             | mov                 dword ptr [esp + 4], esi

        $sequence_5 = { 55 89e5 53 83ec14 a1???????? 8b0d???????? 89c3 }
            // n = 7, score = 200
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   53                   | push                ebx
            //   83ec14               | sub                 esp, 0x14
            //   a1????????           |                     
            //   8b0d????????         |                     
            //   89c3                 | mov                 ebx, eax

        $sequence_6 = { 40 83f810 75f1 83c210 81fa???????? 75e2 }
            // n = 6, score = 200
            //   40                   | inc                 eax
            //   83f810               | cmp                 eax, 0x10
            //   75f1                 | jne                 0xfffffff3
            //   83c210               | add                 edx, 0x10
            //   81fa????????         |                     
            //   75e2                 | jne                 0xffffffe4

        $sequence_7 = { c744240402000000 893424 b901000000 babd010000 a1???????? e8???????? 85c0 }
            // n = 7, score = 200
            //   c744240402000000     | mov                 dword ptr [esp + 4], 2
            //   893424               | mov                 dword ptr [esp], esi
            //   b901000000           | mov                 ecx, 1
            //   babd010000           | mov                 edx, 0x1bd
            //   a1????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_8 = { c68554feffff00 c68555feffff00 c685b8ebffff00 84c0 0f84b3010000 8d85b4ebffff }
            // n = 6, score = 200
            //   c68554feffff00       | mov                 byte ptr [ebp - 0x1ac], 0
            //   c68555feffff00       | mov                 byte ptr [ebp - 0x1ab], 0
            //   c685b8ebffff00       | mov                 byte ptr [ebp - 0x1448], 0
            //   84c0                 | test                al, al
            //   0f84b3010000         | je                  0x1b9
            //   8d85b4ebffff         | lea                 eax, [ebp - 0x144c]

        $sequence_9 = { 8b0d???????? 85db 7406 31d2 f7f3 }
            // n = 5, score = 200
            //   8b0d????????         |                     
            //   85db                 | test                ebx, ebx
            //   7406                 | je                  8
            //   31d2                 | xor                 edx, edx
            //   f7f3                 | div                 ebx

    condition:
        7 of them and filesize < 90112
}