rule win_jelus_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.jelus_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.jelus_rat"
        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???????? 4c8d4d98 4c8d45a8 488d542460 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4d98             | dec                 eax
            //   4c8d45a8             | mov                 ecx, ebx
            //   488d542460           | nop                 

        $sequence_1 = { e8???????? 4c8d4d38 4c8d4540 8bd3 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4d38             | dec                 eax
            //   4c8d4540             | mov                 ecx, ebx
            //   8bd3                 | dec                 esp

        $sequence_2 = { e8???????? 4c8d4818 4c894d30 8b93f4000000 85d2 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   4c8d4818             | dec                 esp
            //   4c894d30             | lea                 ecx, [eax + 0x18]
            //   8b93f4000000         | dec                 esp
            //   85d2                 | mov                 dword ptr [ebp + 0x30], ecx

        $sequence_3 = { e8???????? 4c8d4c2440 488bcb 4c8d442448 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4c2440           | inc                 ebp
            //   488bcb               | xor                 eax, eax
            //   4c8d442448           | dec                 esp

        $sequence_4 = { e8???????? 4c8d4c2478 4c8bc0 488bd6 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4c2478           | lea                 eax, [esp + 0x48]
            //   4c8bc0               | dec                 eax
            //   488bd6               | lea                 edx, [esp + 0x50]

        $sequence_5 = { e8???????? 4c8d4c2460 4c8d442468 488d542438 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4c2460           | dec                 esp
            //   4c8d442468           | lea                 ecx, [esp + 0x40]
            //   488d542438           | dec                 eax

        $sequence_6 = { e8???????? 4c8d4c2440 4c8d05e3261800 488d542450 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4c2440           | mov                 edx, 0x113f
            //   4c8d05e3261800       | dec                 esp
            //   488d542450           | lea                 ecx, [esp + 0x20]

        $sequence_7 = { e8???????? 4c8d4c2420 48895c2428 4533c0 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   4c8d4c2420           | dec                 esp
            //   48895c2428           | lea                 ecx, [eax + 0x18]
            //   4533c0               | dec                 esp

    condition:
        7 of them and filesize < 6474752
}