rule win_fuwuqidrama_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.fuwuqidrama."
        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.fuwuqidrama"
        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 = { 893e 8b4e2c 8b4630 51 50 50 }
            // n = 6, score = 100
            //   893e                 | mov                 dword ptr [esi], edi
            //   8b4e2c               | mov                 ecx, dword ptr [esi + 0x2c]
            //   8b4630               | mov                 eax, dword ptr [esi + 0x30]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   50                   | push                eax

        $sequence_1 = { 85c0 7529 85d2 750a }
            // n = 4, score = 100
            //   85c0                 | test                eax, eax
            //   7529                 | jne                 0x2b
            //   85d2                 | test                edx, edx
            //   750a                 | jne                 0xc

        $sequence_2 = { e8???????? 68???????? 8bce e8???????? eb56 68???????? 8bce }
            // n = 7, score = 100
            //   e8????????           |                     
            //   68????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   eb56                 | jmp                 0x58
            //   68????????           |                     
            //   8bce                 | mov                 ecx, esi

        $sequence_3 = { 50 51 8d4c245c c684242401000001 e8???????? 8b542454 52 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8d4c245c             | lea                 ecx, [esp + 0x5c]
            //   c684242401000001     | mov                 byte ptr [esp + 0x124], 1
            //   e8????????           |                     
            //   8b542454             | mov                 edx, dword ptr [esp + 0x54]
            //   52                   | push                edx

        $sequence_4 = { 52 8bce c644241b20 e8???????? 8b5c2424 6a00 8dbbcd000000 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   8bce                 | mov                 ecx, esi
            //   c644241b20           | mov                 byte ptr [esp + 0x1b], 0x20
            //   e8????????           |                     
            //   8b5c2424             | mov                 ebx, dword ptr [esp + 0x24]
            //   6a00                 | push                0
            //   8dbbcd000000         | lea                 edi, [ebx + 0xcd]

        $sequence_5 = { 57 88442414 bf???????? 83c9ff 33c0 33db 6a01 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   88442414             | mov                 byte ptr [esp + 0x14], al
            //   bf????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   33db                 | xor                 ebx, ebx
            //   6a01                 | push                1

        $sequence_6 = { 50 8bcd c644246003 e8???????? 8b8f88000000 8d542458 894c2458 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8bcd                 | mov                 ecx, ebp
            //   c644246003           | mov                 byte ptr [esp + 0x60], 3
            //   e8????????           |                     
            //   8b8f88000000         | mov                 ecx, dword ptr [edi + 0x88]
            //   8d542458             | lea                 edx, [esp + 0x58]
            //   894c2458             | mov                 dword ptr [esp + 0x58], ecx

        $sequence_7 = { c1e91f 03d1 3bc2 0f83d2000000 8b5604 8b442414 83c9ff }
            // n = 7, score = 100
            //   c1e91f               | shr                 ecx, 0x1f
            //   03d1                 | add                 edx, ecx
            //   3bc2                 | cmp                 eax, edx
            //   0f83d2000000         | jae                 0xd8
            //   8b5604               | mov                 edx, dword ptr [esi + 4]
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_8 = { 83c104 4a 75ee 53 e8???????? 8b4e70 83c404 }
            // n = 7, score = 100
            //   83c104               | add                 ecx, 4
            //   4a                   | dec                 edx
            //   75ee                 | jne                 0xfffffff0
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8b4e70               | mov                 ecx, dword ptr [esi + 0x70]
            //   83c404               | add                 esp, 4

        $sequence_9 = { 8b442434 33f6 3bc6 7505 a1???????? 50 }
            // n = 6, score = 100
            //   8b442434             | mov                 eax, dword ptr [esp + 0x34]
            //   33f6                 | xor                 esi, esi
            //   3bc6                 | cmp                 eax, esi
            //   7505                 | jne                 7
            //   a1????????           |                     
            //   50                   | push                eax

    condition:
        7 of them and filesize < 245760
}