rule win_kelihos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { c20c00 6a10 e8???????? 59 85c0 7402 8900 }
            // n = 7, score = 300
            //   c20c00               | ret                 0xc
            //   6a10                 | push                0x10
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   7402                 | je                  4
            //   8900                 | mov                 dword ptr [eax], eax

        $sequence_1 = { e8???????? 85c0 0f8572010000 ffb4b5b8feffff 8d8d30ffffff e8???????? 8d45b8 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f8572010000         | jne                 0x178
            //   ffb4b5b8feffff       | push                dword ptr [ebp + esi*4 - 0x148]
            //   8d8d30ffffff         | lea                 ecx, [ebp - 0xd0]
            //   e8????????           |                     
            //   8d45b8               | lea                 eax, [ebp - 0x48]

        $sequence_2 = { c6414801 b001 c3 55 8bec 83e4f8 6aff }
            // n = 7, score = 300
            //   c6414801             | mov                 byte ptr [ecx + 0x48], 1
            //   b001                 | mov                 al, 1
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83e4f8               | and                 esp, 0xfffffff8
            //   6aff                 | push                -1

        $sequence_3 = { e8???????? c745e401000000 8365fc00 8b45e4 0fa2 8b7d08 8907 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   c745e401000000       | mov                 dword ptr [ebp - 0x1c], 1
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   0fa2                 | cpuid               
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   8907                 | mov                 dword ptr [edi], eax

        $sequence_4 = { e8???????? 83c01c 56 8bc8 e8???????? 6a00 8d4d80 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   83c01c               | add                 eax, 0x1c
            //   56                   | push                esi
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   6a00                 | push                0
            //   8d4d80               | lea                 ecx, [ebp - 0x80]

        $sequence_5 = { 8b3cbb 8b4764 85c0 7502 8bc7 894664 8b3d???????? }
            // n = 7, score = 300
            //   8b3cbb               | mov                 edi, dword ptr [ebx + edi*4]
            //   8b4764               | mov                 eax, dword ptr [edi + 0x64]
            //   85c0                 | test                eax, eax
            //   7502                 | jne                 4
            //   8bc7                 | mov                 eax, edi
            //   894664               | mov                 dword ptr [esi + 0x64], eax
            //   8b3d????????         |                     

        $sequence_6 = { e8???????? 8d45b8 50 8d45d4 50 e8???????? 59 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   50                   | push                eax
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_7 = { 8d8d5cffffff e9???????? 8d4594 e9???????? 8d4dd0 e9???????? 8d8d5cffffff }
            // n = 7, score = 300
            //   8d8d5cffffff         | lea                 ecx, [ebp - 0xa4]
            //   e9????????           |                     
            //   8d4594               | lea                 eax, [ebp - 0x6c]
            //   e9????????           |                     
            //   8d4dd0               | lea                 ecx, [ebp - 0x30]
            //   e9????????           |                     
            //   8d8d5cffffff         | lea                 ecx, [ebp - 0xa4]

        $sequence_8 = { e8???????? 83c424 8bc8 897c245c e8???????? 834c2450ff 8d44242c }
            // n = 7, score = 300
            //   e8????????           |                     
            //   83c424               | add                 esp, 0x24
            //   8bc8                 | mov                 ecx, eax
            //   897c245c             | mov                 dword ptr [esp + 0x5c], edi
            //   e8????????           |                     
            //   834c2450ff           | or                  dword ptr [esp + 0x50], 0xffffffff
            //   8d44242c             | lea                 eax, [esp + 0x2c]

        $sequence_9 = { c20400 56 8d7204 56 e8???????? 8d4210 c6808100000001 }
            // n = 7, score = 300
            //   c20400               | ret                 4
            //   56                   | push                esi
            //   8d7204               | lea                 esi, [edx + 4]
            //   56                   | push                esi
            //   e8????????           |                     
            //   8d4210               | lea                 eax, [edx + 0x10]
            //   c6808100000001       | mov                 byte ptr [eax + 0x81], 1

    condition:
        7 of them and filesize < 4702208
}