rule win_jinxloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.jinxloader."
        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.jinxloader"
        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 = { e8???????? 488b542460 488b7a08 488b7210 4c8b4218 90 4889f8 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488b542460           | nop                 dword ptr [eax]
            //   488b7a08             | dec                 eax
            //   488b7210             | cmp                 edx, 3
            //   4c8b4218             | jbe                 0xcb2
            //   90                   | dec                 ecx
            //   4889f8               | mov                 edx, ecx

        $sequence_1 = { 55 4889e5 4883ec38 48ba75739294b2366a91 488954242a 48ba6a917288a2a5d16f 4889542430 }
            // n = 7, score = 100
            //   55                   | add                 byte ptr [eax - 0x46], cl
            //   4889e5               | cmpsb               byte ptr [esi], byte ptr es:[edi]
            //   4883ec38             | jle                 0x79
            //   48ba75739294b2366a91     | scasd    eax, dword ptr es:[edi]
            //   488954242a           | jle                 5
            //   48ba6a917288a2a5d16f     | adc    cl, byte ptr [0x24948948]
            //   4889542430           | fiadd               word ptr [edx]

        $sequence_2 = { e8???????? 48895c2418 48898424f0000000 90 488d0542f42500 6690 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   48895c2418           | mov                 ecx, dword ptr [esp + 0x30]
            //   48898424f0000000     | dec                 eax
            //   90                   | mov                 dword ptr [eax + 8], ecx
            //   488d0542f42500       | jne                 0x1c19
            //   6690                 | dec                 eax
            //   e8????????           |                     

        $sequence_3 = { 90 e8???????? 488b4c2478 4839c8 7351 488b4c2440 8b5104 }
            // n = 7, score = 100
            //   90                   | mov                 ecx, dword ptr [esp + 0xeb0]
            //   e8????????           |                     
            //   488b4c2478           | dec                 ecx
            //   4839c8               | mov                 dword ptr [ebx], ecx
            //   7351                 | dec                 eax
            //   488b4c2440           | mov                 dword ptr [eax + 0x18], ecx
            //   8b5104               | dec                 eax

        $sequence_4 = { ffd7 488b4c2418 48ffc1 488b442470 488b542438 488b5c2478 488bb42488000000 }
            // n = 7, score = 100
            //   ffd7                 | dec                 eax
            //   488b4c2418           | cmp                 ecx, 2
            //   48ffc1               | jge                 0x604
            //   488b442470           | dec                 eax
            //   488b542438           | mov                 dword ptr [esp + 0x50], ecx
            //   488b5c2478           | dec                 eax
            //   488bb42488000000     | mov                 dword ptr [esp + 0xb0], eax

        $sequence_5 = { 89f7 31d6 8d3430 8d76b4 4883fa1d 7337 440fb644141b }
            // n = 7, score = 100
            //   89f7                 | dec                 eax
            //   31d6                 | mov                 eax, dword ptr [esp + 0x1d8]
            //   8d3430               | dec                 eax
            //   8d76b4               | cmp                 eax, ecx
            //   4883fa1d             | ja                  0x1824
            //   7337                 | dec                 esp
            //   440fb644141b         | mov                 ecx, dword ptr [esp + 0x1b0]

        $sequence_6 = { eb03 4889ca 4889942418040000 488b942400030000 4889942420040000 488d8c2418040000 bf01000000 }
            // n = 7, score = 100
            //   eb03                 | dec                 eax
            //   4889ca               | mov                 dword ptr [esp + 0x214], edx
            //   4889942418040000     | xor                 eax, eax
            //   488b942400030000     | jmp                 0x1e4
            //   4889942420040000     | movzx               edx, byte ptr [esp + eax + 0x21c]
            //   488d8c2418040000     | dec                 eax
            //   bf01000000           | mov                 edx, 0x7cd0f364

        $sequence_7 = { e8???????? 4889c1 4889df 488d05eea11700 488b9c24b8000000 e8???????? 488b8424c8000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4889c1               | mov                 edx, dword ptr [esp + 0xb0]
            //   4889df               | dec                 eax
            //   488d05eea11700       | mov                 ebx, dword ptr [esp + 0x1e8]
            //   488b9c24b8000000     | dec                 eax
            //   e8????????           |                     
            //   488b8424c8000000     | lea                 eax, [0x405fb7]

        $sequence_8 = { b871000000 ffd1 488b08 4889c2 b88effffff ffd1 488b08 }
            // n = 7, score = 100
            //   b871000000           | dec                 eax
            //   ffd1                 | mov                 edx, dword ptr [esp + 0x250]
            //   488b08               | dec                 eax
            //   4889c2               | mov                 dword ptr [eax + 0x10], edx
            //   b88effffff           | jne                 0x18b5
            //   ffd1                 | dec                 eax
            //   488b08               | mov                 edx, dword ptr [esp + 0x13c0]

        $sequence_9 = { e8???????? 8b4c2458 8908 488b4c2450 48894c2438 4889442430 488b4c2460 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b4c2458             | lea                 eax, [0x1635c6]
            //   8908                 | dec                 eax
            //   488b4c2450           | lea                 edi, [edi - 0x20]
            //   48894c2438           | nop                 dword ptr [eax + eax]
            //   4889442430           | dec                 eax
            //   488b4c2460           | mov                 dword ptr [esp - 0x10], ebp

    condition:
        7 of them and filesize < 20364288
}