rule win_kelihos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { f357 0010 865300 10d7 57 0010 015300 }
            // n = 7, score = 300
            //   f357                 | push                edi
            //   0010                 | add                 byte ptr [eax], dl
            //   865300               | xchg                byte ptr [ebx], dl
            //   10d7                 | adc                 bh, dl
            //   57                   | push                edi
            //   0010                 | add                 byte ptr [eax], dl
            //   015300               | add                 dword ptr [ebx], edx

        $sequence_1 = { e8???????? 68???????? 8d8d60ffffff e8???????? 68???????? 8d8d7cffffff c745fc09000000 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   68????????           |                     
            //   8d8d60ffffff         | lea                 ecx, [ebp - 0xa0]
            //   e8????????           |                     
            //   68????????           |                     
            //   8d8d7cffffff         | lea                 ecx, [ebp - 0x84]
            //   c745fc09000000       | mov                 dword ptr [ebp - 4], 9

        $sequence_2 = { c20800 55 8bec 83ec14 53 56 8b37 }
            // n = 7, score = 300
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec14               | sub                 esp, 0x14
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8b37                 | mov                 esi, dword ptr [edi]

        $sequence_3 = { c9 c20400 833d????????00 53 56 57 8b7c2418 }
            // n = 7, score = 300
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   833d????????00       |                     
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b7c2418             | mov                 edi, dword ptr [esp + 0x18]

        $sequence_4 = { eb02 33f6 e8???????? 8b0d???????? 8b15???????? 8b0491 8b4810 }
            // n = 7, score = 300
            //   eb02                 | jmp                 4
            //   33f6                 | xor                 esi, esi
            //   e8????????           |                     
            //   8b0d????????         |                     
            //   8b15????????         |                     
            //   8b0491               | mov                 eax, dword ptr [ecx + edx*4]
            //   8b4810               | mov                 ecx, dword ptr [eax + 0x10]

        $sequence_5 = { e8???????? 8b4614 8b00 8b0e 57 ff7508 ff75fc }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8b4614               | mov                 eax, dword ptr [esi + 0x14]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff75fc               | push                dword ptr [ebp - 4]

        $sequence_6 = { ff15???????? 8bf0 83c408 85f6 7447 56 56 }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   85f6                 | test                esi, esi
            //   7447                 | je                  0x49
            //   56                   | push                esi
            //   56                   | push                esi

        $sequence_7 = { ff742408 51 e8???????? b001 c3 32c0 c3 }
            // n = 7, score = 300
            //   ff742408             | push                dword ptr [esp + 8]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   b001                 | mov                 al, 1
            //   c3                   | ret                 
            //   32c0                 | xor                 al, al
            //   c3                   | ret                 

        $sequence_8 = { e8???????? 8d8de8fdffff e8???????? 8d85e8fdffff 50 c645fc02 e8???????? }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8d8de8fdffff         | lea                 ecx, [ebp - 0x218]
            //   e8????????           |                     
            //   8d85e8fdffff         | lea                 eax, [ebp - 0x218]
            //   50                   | push                eax
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   e8????????           |                     

        $sequence_9 = { ff55e8 8b4d10 83c410 3bf7 8b3d???????? 8901 7403 }
            // n = 7, score = 300
            //   ff55e8               | call                dword ptr [ebp - 0x18]
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   83c410               | add                 esp, 0x10
            //   3bf7                 | cmp                 esi, edi
            //   8b3d????????         |                     
            //   8901                 | mov                 dword ptr [ecx], eax
            //   7403                 | je                  5

    condition:
        7 of them and filesize < 4702208
}