rule win_kelihos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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???????? 8bf1 8b4508 8945f0 c745fc01000000 8975ec 8d5c3602 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8bf1                 | mov                 esi, ecx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   8975ec               | mov                 dword ptr [ebp - 0x14], esi
            //   8d5c3602             | lea                 ebx, [esi + esi + 2]

        $sequence_1 = { c645fc08 e8???????? 68???????? 8d8dd0feffff e8???????? 8d85d0feffff 50 }
            // n = 7, score = 300
            //   c645fc08             | mov                 byte ptr [ebp - 4], 8
            //   e8????????           |                     
            //   68????????           |                     
            //   8d8dd0feffff         | lea                 ecx, [ebp - 0x130]
            //   e8????????           |                     
            //   8d85d0feffff         | lea                 eax, [ebp - 0x130]
            //   50                   | push                eax

        $sequence_2 = { e9???????? 68cc000000 b8???????? e8???????? 8d8540ffffff 50 8bf9 }
            // n = 7, score = 300
            //   e9????????           |                     
            //   68cc000000           | push                0xcc
            //   b8????????           |                     
            //   e8????????           |                     
            //   8d8540ffffff         | lea                 eax, [ebp - 0xc0]
            //   50                   | push                eax
            //   8bf9                 | mov                 edi, ecx

        $sequence_3 = { ff7310 33c0 8d7d08 aa 8bfb 8d75e8 e8???????? }
            // n = 7, score = 300
            //   ff7310               | push                dword ptr [ebx + 0x10]
            //   33c0                 | xor                 eax, eax
            //   8d7d08               | lea                 edi, [ebp + 8]
            //   aa                   | stosb               byte ptr es:[edi], al
            //   8bfb                 | mov                 edi, ebx
            //   8d75e8               | lea                 esi, [ebp - 0x18]
            //   e8????????           |                     

        $sequence_4 = { e8???????? 8db5b8fdffff e8???????? 53 6a01 8d4dbc e8???????? }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8db5b8fdffff         | lea                 esi, [ebp - 0x248]
            //   e8????????           |                     
            //   53                   | push                ebx
            //   6a01                 | push                1
            //   8d4dbc               | lea                 ecx, [ebp - 0x44]
            //   e8????????           |                     

        $sequence_5 = { ff36 ff7004 ff30 8d45c0 50 e8???????? 8b7508 }
            // n = 7, score = 300
            //   ff36                 | push                dword ptr [esi]
            //   ff7004               | push                dword ptr [eax + 4]
            //   ff30                 | push                dword ptr [eax]
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]

        $sequence_6 = { c7400c00f0ffff 833f00 8bce 740d 8bd7 8b0a 83791000 }
            // n = 7, score = 300
            //   c7400c00f0ffff       | mov                 dword ptr [eax + 0xc], 0xfffff000
            //   833f00               | cmp                 dword ptr [edi], 0
            //   8bce                 | mov                 ecx, esi
            //   740d                 | je                  0xf
            //   8bd7                 | mov                 edx, edi
            //   8b0a                 | mov                 ecx, dword ptr [edx]
            //   83791000             | cmp                 dword ptr [ecx + 0x10], 0

        $sequence_7 = { c6430801 8d4538 50 b9???????? 8bfb e8???????? 8bd8 }
            // n = 7, score = 300
            //   c6430801             | mov                 byte ptr [ebx + 8], 1
            //   8d4538               | lea                 eax, [ebp + 0x38]
            //   50                   | push                eax
            //   b9????????           |                     
            //   8bfb                 | mov                 edi, ebx
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_8 = { ffd5 0fb7f0 b803000000 8d4805 8d50ff e8???????? 83ffff }
            // n = 7, score = 300
            //   ffd5                 | call                ebp
            //   0fb7f0               | movzx               esi, ax
            //   b803000000           | mov                 eax, 3
            //   8d4805               | lea                 ecx, [eax + 5]
            //   8d50ff               | lea                 edx, [eax - 1]
            //   e8????????           |                     
            //   83ffff               | cmp                 edi, -1

        $sequence_9 = { eb89 5f 5e 5b c9 c20400 55 }
            // n = 7, score = 300
            //   eb89                 | jmp                 0xffffff8b
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   55                   | push                ebp

    condition:
        7 of them and filesize < 4702208
}