rule win_kimjongrat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.kimjongrat."
        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.kimjongrat"
        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 = { e8???????? 8bf0 53 8975f0 ff15???????? 83c408 894508 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   53                   | push                ebx
            //   8975f0               | mov                 dword ptr [ebp - 0x10], esi
            //   ff15????????         |                     
            //   83c408               | add                 esp, 8
            //   894508               | mov                 dword ptr [ebp + 8], eax

        $sequence_1 = { ff750c 51 e8???????? 83c418 5f 5e 5b }
            // n = 7, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_2 = { e9???????? c6840de0f8ffff6e e9???????? c6840de0f8ffff2d e9???????? c6840de0f8ffff7d e9???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   c6840de0f8ffff6e     | mov                 byte ptr [ebp + ecx - 0x720], 0x6e
            //   e9????????           |                     
            //   c6840de0f8ffff2d     | mov                 byte ptr [ebp + ecx - 0x720], 0x2d
            //   e9????????           |                     
            //   c6840de0f8ffff7d     | mov                 byte ptr [ebp + ecx - 0x720], 0x7d
            //   e9????????           |                     

        $sequence_3 = { e8???????? 83c410 8bc8 eb33 8bc2 99 52 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8bc8                 | mov                 ecx, eax
            //   eb33                 | jmp                 0x35
            //   8bc2                 | mov                 eax, edx
            //   99                   | cdq                 
            //   52                   | push                edx

        $sequence_4 = { e9???????? c6840d2ccbffff71 e9???????? c6840d2ccbffff66 e9???????? c6840d2ccbffff68 e9???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   c6840d2ccbffff71     | mov                 byte ptr [ebp + ecx - 0x34d4], 0x71
            //   e9????????           |                     
            //   c6840d2ccbffff66     | mov                 byte ptr [ebp + ecx - 0x34d4], 0x66
            //   e9????????           |                     
            //   c6840d2ccbffff68     | mov                 byte ptr [ebp + ecx - 0x34d4], 0x68
            //   e9????????           |                     

        $sequence_5 = { e8???????? 8b55d4 8b4de4 83c408 85c0 750b 8b45cc }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b55d4               | mov                 edx, dword ptr [ebp - 0x2c]
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   750b                 | jne                 0xd
            //   8b45cc               | mov                 eax, dword ptr [ebp - 0x34]

        $sequence_6 = { 57 8b3e 33db 897dfc 85c0 0f84e9000000 8d642400 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   8b3e                 | mov                 edi, dword ptr [esi]
            //   33db                 | xor                 ebx, ebx
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   85c0                 | test                eax, eax
            //   0f84e9000000         | je                  0xef
            //   8d642400             | lea                 esp, [esp]

        $sequence_7 = { e8???????? 8bf0 83c408 8975e4 85f6 0f85663b0000 8b430c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   85f6                 | test                esi, esi
            //   0f85663b0000         | jne                 0x3b6c
            //   8b430c               | mov                 eax, dword ptr [ebx + 0xc]

        $sequence_8 = { f7401800001000 0f8422010000 397a4c 0f8519010000 8b4228 a801 0f850e010000 }
            // n = 7, score = 100
            //   f7401800001000       | test                dword ptr [eax + 0x18], 0x100000
            //   0f8422010000         | je                  0x128
            //   397a4c               | cmp                 dword ptr [edx + 0x4c], edi
            //   0f8519010000         | jne                 0x11f
            //   8b4228               | mov                 eax, dword ptr [edx + 0x28]
            //   a801                 | test                al, 1
            //   0f850e010000         | jne                 0x114

        $sequence_9 = { ff73e4 50 8d43c4 50 8d4384 50 57 }
            // n = 7, score = 100
            //   ff73e4               | push                dword ptr [ebx - 0x1c]
            //   50                   | push                eax
            //   8d43c4               | lea                 eax, [ebx - 0x3c]
            //   50                   | push                eax
            //   8d4384               | lea                 eax, [ebx - 0x7c]
            //   50                   | push                eax
            //   57                   | push                edi

    condition:
        7 of them and filesize < 1572864
}