rule win_minibus_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.minibus."
        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.minibus"
        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 = { 81f900100000 7227 8d4123 3bc1 7674 }
            // n = 5, score = 300
            //   81f900100000         | cmp                 ecx, 0x1000
            //   7227                 | jb                  0x29
            //   8d4123               | lea                 eax, [ecx + 0x23]
            //   3bc1                 | cmp                 eax, ecx
            //   7674                 | jbe                 0x76

        $sequence_1 = { 7202 8b1f 8b4f10 894dd8 }
            // n = 4, score = 300
            //   7202                 | jb                  4
            //   8b1f                 | mov                 ebx, dword ptr [edi]
            //   8b4f10               | mov                 ecx, dword ptr [edi + 0x10]
            //   894dd8               | mov                 dword ptr [ebp - 0x28], ecx

        $sequence_2 = { ff15???????? 57 56 e8???????? 8b5510 83c40c 85d2 }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   57                   | push                edi
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   83c40c               | add                 esp, 0xc
            //   85d2                 | test                edx, edx

        $sequence_3 = { 894dd8 8d0409 8d1418 8945e8 8955f8 8bd0 }
            // n = 6, score = 300
            //   894dd8               | mov                 dword ptr [ebp - 0x28], ecx
            //   8d0409               | lea                 eax, [ecx + ecx]
            //   8d1418               | lea                 edx, [eax + ebx]
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   8bd0                 | mov                 edx, eax

        $sequence_4 = { 0f4255e0 894dec 85d2 7429 8b45f4 }
            // n = 5, score = 300
            //   0f4255e0             | cmovb               edx, dword ptr [ebp - 0x20]
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   85d2                 | test                edx, edx
            //   7429                 | je                  0x2b
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]

        $sequence_5 = { 8975f4 8945e4 83f808 7205 8b0e 894df4 }
            // n = 6, score = 300
            //   8975f4               | mov                 dword ptr [ebp - 0xc], esi
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   83f808               | cmp                 eax, 8
            //   7205                 | jb                  7
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx

        $sequence_6 = { c70700000000 c7471000000000 c7471400000000 83781410 }
            // n = 4, score = 300
            //   c70700000000         | mov                 dword ptr [edi], 0
            //   c7471000000000       | mov                 dword ptr [edi + 0x10], 0
            //   c7471400000000       | mov                 dword ptr [edi + 0x14], 0
            //   83781410             | cmp                 dword ptr [eax + 0x14], 0x10

        $sequence_7 = { 2bda 8d43fc 83f81f 7719 8bda 51 }
            // n = 6, score = 300
            //   2bda                 | sub                 ebx, edx
            //   8d43fc               | lea                 eax, [ebx - 4]
            //   83f81f               | cmp                 eax, 0x1f
            //   7719                 | ja                  0x1b
            //   8bda                 | mov                 ebx, edx
            //   51                   | push                ecx

        $sequence_8 = { 765a 51 e8???????? 83c404 85c0 740b 8d7823 }
            // n = 7, score = 300
            //   765a                 | jbe                 0x5c
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   740b                 | je                  0xd
            //   8d7823               | lea                 edi, [eax + 0x23]

        $sequence_9 = { 8b4de4 83f908 7234 8b55d0 8d0c4d02000000 8bc2 }
            // n = 6, score = 300
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   83f908               | cmp                 ecx, 8
            //   7234                 | jb                  0x36
            //   8b55d0               | mov                 edx, dword ptr [ebp - 0x30]
            //   8d0c4d02000000       | lea                 ecx, [ecx*2 + 2]
            //   8bc2                 | mov                 eax, edx

    condition:
        7 of them and filesize < 324608
}