rule win_broomstick_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.broomstick."
        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.broomstick"
        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 = { 76f3 2bc2 83c002 99 83e203 03c2 c1f802 }
            // n = 7, score = 2200
            //   76f3                 | jbe                 0xfffffff5
            //   2bc2                 | sub                 eax, edx
            //   83c002               | add                 eax, 2
            //   99                   | cdq                 
            //   83e203               | and                 edx, 3
            //   03c2                 | add                 eax, edx
            //   c1f802               | sar                 eax, 2

        $sequence_1 = { 8b75d0 2bc6 894ddc 51 }
            // n = 4, score = 2100
            //   8b75d0               | mov                 esi, dword ptr [ebp - 0x30]
            //   2bc6                 | sub                 eax, esi
            //   894ddc               | mov                 dword ptr [ebp - 0x24], ecx
            //   51                   | push                ecx

        $sequence_2 = { 0fb608 40 80b9????????3f 76f3 2bc2 }
            // n = 5, score = 2100
            //   0fb608               | movzx               ecx, byte ptr [eax]
            //   40                   | inc                 eax
            //   80b9????????3f       |                     
            //   76f3                 | jbe                 0xfffffff5
            //   2bc2                 | sub                 eax, edx

        $sequence_3 = { c6400100 8808 eb13 ff75e8 }
            // n = 4, score = 2100
            //   c6400100             | mov                 byte ptr [eax + 1], 0
            //   8808                 | mov                 byte ptr [eax], cl
            //   eb13                 | jmp                 0x15
            //   ff75e8               | push                dword ptr [ebp - 0x18]

        $sequence_4 = { 51 50 51 8bce e8???????? 8b4dec }
            // n = 6, score = 2100
            //   51                   | push                ecx
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]

        $sequence_5 = { 33c0 c7467000000000 c7467407000000 66894660 }
            // n = 4, score = 2100
            //   33c0                 | xor                 eax, eax
            //   c7467000000000       | mov                 dword ptr [esi + 0x70], 0
            //   c7467407000000       | mov                 dword ptr [esi + 0x74], 7
            //   66894660             | mov                 word ptr [esi + 0x60], ax

        $sequence_6 = { 56 e8???????? 8b45dc 83c40c c6040600 eb10 }
            // n = 6, score = 2100
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   83c40c               | add                 esp, 0xc
            //   c6040600             | mov                 byte ptr [esi + eax], 0
            //   eb10                 | jmp                 0x12

        $sequence_7 = { 51 50 e8???????? 83c408 33c0 c7467000000000 }
            // n = 6, score = 2100
            //   51                   | push                ecx
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   33c0                 | xor                 eax, eax
            //   c7467000000000       | mov                 dword ptr [esi + 0x70], 0

        $sequence_8 = { ba01000000 488d8120630400 ffd0 488b05???????? }
            // n = 4, score = 100
            //   ba01000000           | inc                 ecx
            //   488d8120630400       | mov                 eax, 0x88
            //   ffd0                 | mov                 edx, 1
            //   488b05????????       |                     

        $sequence_9 = { 49898688150400 488d4c2428 ffd5 48b80b8b55f8b9616cd5 }
            // n = 4, score = 100
            //   49898688150400       | and                 edx, 3
            //   488d4c2428           | dec                 esp
            //   ffd5                 | sub                 eax, eax
            //   48b80b8b55f8b9616cd5     | mov    edx, 0x22

        $sequence_10 = { 49898688410300 b9f0712400 4c8b25???????? 41ffd4 }
            // n = 4, score = 100
            //   49898688410300       | sub                 eax, edx
            //   b9f0712400           | add                 eax, 2
            //   4c8b25????????       |                     
            //   41ffd4               | cdq                 

        $sequence_11 = { 49898688430300 4889f1 ba97000000 41b8cb000000 }
            // n = 4, score = 100
            //   49898688430300       | sar                 eax, 2
            //   4889f1               | sub                 eax, edx
            //   ba97000000           | add                 eax, 2
            //   41b8cb000000         | cdq                 

        $sequence_12 = { 49898688140400 4889f1 4889fa 4c8b3d???????? 41ffd7 4889f1 ba0a000000 }
            // n = 7, score = 100
            //   49898688140400       | add                 eax, 2
            //   4889f1               | cdq                 
            //   4889fa               | jbe                 0xfffffff5
            //   4c8b3d????????       |                     
            //   41ffd7               | sub                 eax, edx
            //   4889f1               | add                 eax, 2
            //   ba0a000000           | cdq                 

        $sequence_13 = { ba01000000 488bf8 ff15???????? 488d8d80050000 }
            // n = 4, score = 100
            //   ba01000000           | mov                 edx, 0x9630ed
            //   488bf8               | dec                 eax
            //   ff15????????         |                     
            //   488d8d80050000       | mov                 ecx, edi

        $sequence_14 = { 488d15e9640100 ff15???????? 4885c0 7412 49ba707b5a5e9b8701a2 }
            // n = 5, score = 100
            //   488d15e9640100       | mov                 eax, 0x99d7206a
            //   ff15????????         |                     
            //   4885c0               | iretd               
            //   7412                 | push                0x78
            //   49ba707b5a5e9b8701a2     | and    dword ptr [edx + 0x9b2a34], edi

        $sequence_15 = { 49898688360300 488d4c2420 41ffd7 4889f1 }
            // n = 4, score = 100
            //   49898688360300       | sub                 eax, edx
            //   488d4c2420           | add                 eax, 2
            //   41ffd7               | cdq                 
            //   4889f1               | and                 edx, 3

        $sequence_16 = { 49898688160400 b917d46400 41ffd4 4889c7 }
            // n = 4, score = 100
            //   49898688160400       | dec                 eax
            //   b917d46400           | lea                 edx, [0x215e5]
            //   41ffd4               | dec                 eax
            //   4889c7               | mov                 eax, dword ptr [esp + 0x20]

        $sequence_17 = { ba01000000 488bd8 ff15???????? 488bd6 }
            // n = 4, score = 100
            //   ba01000000           | dec                 eax
            //   488bd8               | mov                 ecx, edi
            //   ff15????????         |                     
            //   488bd6               | mov                 edx, 1

        $sequence_18 = { ba01000000 49898602940300 488bcf 48b81e53fbe65dc7397c }
            // n = 4, score = 100
            //   ba01000000           | mov                 edi, eax
            //   49898602940300       | inc                 ebp
            //   488bcf               | xor                 ecx, ecx
            //   48b81e53fbe65dc7397c     | mov    edx, 1

        $sequence_19 = { ba01000000 488bf0 ff15???????? 4533c9 }
            // n = 4, score = 100
            //   ba01000000           | dec                 eax
            //   488bf0               | mov                 ecx, edi
            //   ff15????????         |                     
            //   4533c9               | mov                 edx, 0x22ffa0

        $sequence_20 = { 488d1500520300 eb2a 418bc8 e8???????? 0f57c0 }
            // n = 5, score = 100
            //   488d1500520300       | dec                 eax
            //   eb2a                 | mov                 ecx, edi
            //   418bc8               | mov                 edx, 1
            //   e8????????           |                     
            //   0f57c0               | dec                 eax

        $sequence_21 = { ba01000000 488bcf ff15???????? ba32ac0600 488bcf }
            // n = 5, score = 100
            //   ba01000000           | mov                 edx, 1
            //   488bcf               | dec                 eax
            //   ff15????????         |                     
            //   ba32ac0600           | mov                 ecx, edi
            //   488bcf               | mov                 edx, 0x6ac32

        $sequence_22 = { ba01000000 49898612ff0300 488bcf 48b81f58d5789b9e337f }
            // n = 4, score = 100
            //   ba01000000           | inc                 ebp
            //   49898612ff0300       | xor                 ecx, ecx
            //   488bcf               | mov                 edx, 0xd2
            //   48b81f58d5789b9e337f     | inc    ecx

        $sequence_23 = { 48c1e203 490314de eb07 488d15e5150200 }
            // n = 4, score = 100
            //   48c1e203             | dec                 ecx
            //   490314de             | mov                 dword ptr [esi - 0xa56], eax
            //   eb07                 | dec                 eax
            //   488d15e5150200       | mov                 ecx, edi

        $sequence_24 = { e8???????? 488b442420 4c8b4818 4d85c9 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   488b442420           | mov                 edx, 1
            //   4c8b4818             | dec                 eax
            //   4d85c9               | mov                 edi, eax

        $sequence_25 = { 83f801 7516 488d05a2ab0100 488b4c2430 483bc8 }
            // n = 5, score = 100
            //   83f801               | mov                 edx, 8
            //   7516                 | mov                 edx, 1
            //   488d05a2ab0100       | dec                 eax
            //   488b4c2430           | mov                 edi, eax
            //   483bc8               | mov                 edx, 8

        $sequence_26 = { ba01000000 49898565230300 488bce 48b8234a9581780326f6 }
            // n = 4, score = 100
            //   ba01000000           | mov                 esi, eax
            //   49898565230300       | mov                 edx, 0xac6071
            //   488bce               | dec                 eax
            //   48b8234a9581780326f6     | mov    ecx, esi

        $sequence_27 = { 4c89bc2460100000 ff15???????? 4c8bf8 4885c0 }
            // n = 4, score = 100
            //   4c89bc2460100000     | mov                 edi, eax
            //   ff15????????         |                     
            //   4c8bf8               | mov                 edx, 8
            //   4885c0               | dec                 eax

        $sequence_28 = { 49898688320300 b9bc474300 41ffd4 4889c7 }
            // n = 4, score = 100
            //   49898688320300       | xorps               xmm0, xmm0
            //   b9bc474300           | dec                 esp
            //   41ffd4               | mov                 dword ptr [esp + 0x1060], edi
            //   4889c7               | dec                 esp

        $sequence_29 = { 49898688420300 48b8111ed81f4f83a99f 49898690420300 488d4c2420 }
            // n = 4, score = 100
            //   49898688420300       | sub                 eax, esi
            //   48b8111ed81f4f83a99f     | mov    dword ptr [ebp - 0x24], ecx
            //   49898690420300       | push                ecx
            //   488d4c2420           | jbe                 0xfffffff5

        $sequence_30 = { 4c2bc0 ba22000000 488bc8 e8???????? 4885c0 }
            // n = 5, score = 100
            //   4c2bc0               | mov                 edx, 1
            //   ba22000000           | dec                 eax
            //   488bc8               | mov                 edi, eax
            //   e8????????           |                     
            //   4885c0               | dec                 eax

    condition:
        7 of them and filesize < 1567744
}