rule win_kelihos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.kelihos."
        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.kelihos"
        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???????? 53 6a01 8d4c242c e8???????? 53 8d8c2480000000 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   53                   | push                ebx
            //   6a01                 | push                1
            //   8d4c242c             | lea                 ecx, [esp + 0x2c]
            //   e8????????           |                     
            //   53                   | push                ebx
            //   8d8c2480000000       | lea                 ecx, [esp + 0x80]

        $sequence_1 = { fec3 c645fc03 e8???????? 84db 7432 32db 8db508ffffff }
            // n = 7, score = 300
            //   fec3                 | inc                 bl
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   e8????????           |                     
            //   84db                 | test                bl, bl
            //   7432                 | je                  0x34
            //   32db                 | xor                 bl, bl
            //   8db508ffffff         | lea                 esi, [ebp - 0xf8]

        $sequence_2 = { 8b442438 897804 897808 8938 0f84a2020000 89780c 897814 }
            // n = 7, score = 300
            //   8b442438             | mov                 eax, dword ptr [esp + 0x38]
            //   897804               | mov                 dword ptr [eax + 4], edi
            //   897808               | mov                 dword ptr [eax + 8], edi
            //   8938                 | mov                 dword ptr [eax], edi
            //   0f84a2020000         | je                  0x2a8
            //   89780c               | mov                 dword ptr [eax + 0xc], edi
            //   897814               | mov                 dword ptr [eax + 0x14], edi

        $sequence_3 = { ff15???????? 50 ff15???????? 8bf0 85f6 7511 bf08000000 }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   7511                 | jne                 0x13
            //   bf08000000           | mov                 edi, 8

        $sequence_4 = { e8???????? 6835010000 8bce c60046 e8???????? 6887010000 8bce }
            // n = 7, score = 300
            //   e8????????           |                     
            //   6835010000           | push                0x135
            //   8bce                 | mov                 ecx, esi
            //   c60046               | mov                 byte ptr [eax], 0x46
            //   e8????????           |                     
            //   6887010000           | push                0x187
            //   8bce                 | mov                 ecx, esi

        $sequence_5 = { e9???????? 8d45d4 e9???????? 8d45b4 e9???????? 8d4588 50 }
            // n = 7, score = 300
            //   e9????????           |                     
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   e9????????           |                     
            //   8d45b4               | lea                 eax, [ebp - 0x4c]
            //   e9????????           |                     
            //   8d4588               | lea                 eax, [ebp - 0x78]
            //   50                   | push                eax

        $sequence_6 = { 8bc7 e8???????? c20c00 8d854cffffff 50 e8???????? c645fc08 }
            // n = 7, score = 300
            //   8bc7                 | mov                 eax, edi
            //   e8????????           |                     
            //   c20c00               | ret                 0xc
            //   8d854cffffff         | lea                 eax, [ebp - 0xb4]
            //   50                   | push                eax
            //   e8????????           |                     
            //   c645fc08             | mov                 byte ptr [ebp - 4], 8

        $sequence_7 = { ff750c 8d4e08 c645fc02 e8???????? 85c0 751e 8b06 }
            // n = 7, score = 300
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8d4e08               | lea                 ecx, [esi + 8]
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   751e                 | jne                 0x20
            //   8b06                 | mov                 eax, dword ptr [esi]

        $sequence_8 = { 8bce c60028 e8???????? 6a26 8bce c60029 e8???????? }
            // n = 7, score = 300
            //   8bce                 | mov                 ecx, esi
            //   c60028               | mov                 byte ptr [eax], 0x28
            //   e8????????           |                     
            //   6a26                 | push                0x26
            //   8bce                 | mov                 ecx, esi
            //   c60029               | mov                 byte ptr [eax], 0x29
            //   e8????????           |                     

        $sequence_9 = { ff7710 8d86ac000000 e8???????? 8b4710 59 59 50 }
            // n = 7, score = 300
            //   ff7710               | push                dword ptr [edi + 0x10]
            //   8d86ac000000         | lea                 eax, [esi + 0xac]
            //   e8????????           |                     
            //   8b4710               | mov                 eax, dword ptr [edi + 0x10]
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   50                   | push                eax

    condition:
        7 of them and filesize < 4702208
}