rule win_tiger_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.tiger_rat."
        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.tiger_rat"
        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 = { 4883cbff 0f1f8000000000 48ffc3 803c1a00 75f7 488d8e88000000 4c8bc3 }
            // n = 7, score = 200
            //   4883cbff             | lea                 edx, [ebp + 0x67]
            //   0f1f8000000000       | mov                 ebx, eax
            //   48ffc3               | dec                 eax
            //   803c1a00             | lea                 ecx, [ebp + 0x6f]
            //   75f7                 | xor                 eax, eax
            //   488d8e88000000       | dec                 eax
            //   4c8bc3               | add                 esp, 0x68

        $sequence_1 = { 4883ec20 33db 498bf9 418be8 488bf1 }
            // n = 5, score = 200
            //   4883ec20             | mov                 ecx, esi
            //   33db                 | dec                 esp
            //   498bf9               | mov                 dword ptr [esp + 0x28], ebp
            //   418be8               | inc                 esp
            //   488bf1               | mov                 dword ptr [esp + 0x20], esp

        $sequence_2 = { 4883cbff 48ffc3 66833c5800 75f6 66ffc3 }
            // n = 5, score = 200
            //   4883cbff             | ret                 
            //   48ffc3               | mov                 dword ptr [esp + 0x58], 0x17783708
            //   66833c5800           | mov                 dword ptr [esp + 0x5c], 0x1a57354c
            //   75f6                 | mov                 dword ptr [esp + 0x60], 0x422a
            //   66ffc3               | mov                 byte ptr [esp + 0x40], 0

        $sequence_3 = { 33d2 488d4368 488bcb 448d4a0c }
            // n = 4, score = 200
            //   33d2                 | or                  ebx, 0xffffffff
            //   488d4368             | dec                 eax
            //   488bcb               | inc                 ebx
            //   448d4a0c             | cmp                 word ptr [eax + ebx*2], 0

        $sequence_4 = { 33d2 488d4c2470 448d4268 e8???????? 33c0 488d55e0 4889442450 }
            // n = 7, score = 200
            //   33d2                 | dec                 esp
            //   488d4c2470           | mov                 dword ptr [esp + 0x28], ebp
            //   448d4268             | inc                 esp
            //   e8????????           |                     
            //   33c0                 | mov                 dword ptr [esp + 0x20], esp
            //   488d55e0             | xor                 edx, edx
            //   4889442450           | dec                 eax

        $sequence_5 = { 33d2 488bce 4c896c2428 4489642420 }
            // n = 4, score = 200
            //   33d2                 | dec                 esp
            //   488bce               | mov                 eax, ebx
            //   4c896c2428           | dec                 eax
            //   4489642420           | or                  ebx, 0xffffffff

        $sequence_6 = { 33d2 488bcb 4c896588 488906 ff15???????? 894610 488b4588 }
            // n = 7, score = 200
            //   33d2                 | dec                 eax
            //   488bcb               | inc                 ebx
            //   4c896588             | cmp                 byte ptr [edx + ebx], 0
            //   488906               | jne                 7
            //   ff15????????         |                     
            //   894610               | dec                 eax
            //   488b4588             | lea                 ecx, [esi + 0x88]

        $sequence_7 = { 4883ec10 4c8bea 488bf9 48c70200000000 }
            // n = 4, score = 200
            //   4883ec10             | dec                 eax
            //   4c8bea               | mov                 dword ptr [esi], eax
            //   488bf9               | mov                 dword ptr [esi + 0x10], eax
            //   48c70200000000       | dec                 eax

        $sequence_8 = { 488b8424c0000000 448938 498bc4 4883c470 415f 415e }
            // n = 6, score = 100
            //   488b8424c0000000     | dec                 eax
            //   448938               | mov                 eax, dword ptr [esp + 0xc0]
            //   498bc4               | inc                 esp
            //   4883c470             | mov                 dword ptr [eax], edi
            //   415f                 | dec                 ecx
            //   415e                 | mov                 eax, esp

        $sequence_9 = { c3 48895c2408 57 4883ec20 488d1de7410100 488d3de0410100 }
            // n = 6, score = 100
            //   c3                   | inc                 ecx
            //   48895c2408           | pop                 esi
            //   57                   | xor                 edx, edx
            //   4883ec20             | inc                 ecx
            //   488d1de7410100       | mov                 eax, 0x7d0
            //   488d3de0410100       | dec                 eax

        $sequence_10 = { 488bce c745f74511197b c745fb14483240 8905???????? c745ff5c6e560b 66c745035400 c705????????33000000 }
            // n = 7, score = 100
            //   488bce               | ret                 
            //   c745f74511197b       | dec                 eax
            //   c745fb14483240       | mov                 dword ptr [esp + 8], ebx
            //   8905????????         |                     
            //   c745ff5c6e560b       | push                edi
            //   66c745035400         | dec                 eax
            //   c705????????33000000     |     

        $sequence_11 = { 488d5567 8bd8 0faf0d???????? 890d???????? 488d4d6f ff15???????? }
            // n = 6, score = 100
            //   488d5567             | sub                 esp, 0x20
            //   8bd8                 | dec                 eax
            //   0faf0d????????       |                     
            //   890d????????         |                     
            //   488d4d6f             | lea                 ebx, [0x141e7]
            //   ff15????????         |                     

        $sequence_12 = { c744245808377817 c744245c4c35571a 8905???????? c74424602a420000 c644244000 e8???????? }
            // n = 6, score = 100
            //   c744245808377817     | mov                 ecx, ebx
            //   c744245c4c35571a     | inc                 ecx
            //   8905????????         |                     
            //   c74424602a420000     | mov                 eax, 0x8000
            //   c644244000           | dec                 eax
            //   e8????????           |                     

        $sequence_13 = { 33c0 4883c468 c3 3305???????? }
            // n = 4, score = 100
            //   33c0                 | dec                 eax
            //   4883c468             | lea                 edi, [0x141e0]
            //   c3                   | dec                 eax
            //   3305????????         |                     

        $sequence_14 = { 488bcb e8???????? 8b0d???????? 41b800800000 030d???????? }
            // n = 5, score = 100
            //   488bcb               | mov                 ecx, ebx
            //   e8????????           |                     
            //   8b0d????????         |                     
            //   41b800800000         | movdqu              xmmword ptr [esp + 0x30], xmm0
            //   030d????????         |                     

        $sequence_15 = { 33d2 41b8d0070000 488bcb f30f7f442430 c705????????12000000 }
            // n = 5, score = 100
            //   33d2                 | dec                 eax
            //   41b8d0070000         | add                 esp, 0x70
            //   488bcb               | inc                 ecx
            //   f30f7f442430         | pop                 edi
            //   c705????????12000000     |     

    condition:
        7 of them and filesize < 557056
}