rule win_hikit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.hikit."
        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.hikit"
        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 = { 33ff 57 68???????? 6802000080 ffd3 85c0 0f856c010000 }
            // n = 7, score = 100
            //   33ff                 | xor                 edi, edi
            //   57                   | push                edi
            //   68????????           |                     
            //   6802000080           | push                0x80000002
            //   ffd3                 | call                ebx
            //   85c0                 | test                eax, eax
            //   0f856c010000         | jne                 0x172

        $sequence_1 = { ff35???????? ff15???????? 85c0 7504 8807 eb0b }
            // n = 6, score = 100
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7504                 | jne                 6
            //   8807                 | mov                 byte ptr [edi], al
            //   eb0b                 | jmp                 0xd

        $sequence_2 = { e8???????? 85c0 0f8502010000 8d450b 50 ff750c ff15???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f8502010000         | jne                 0x108
            //   8d450b               | lea                 eax, [ebp + 0xb]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff15????????         |                     

        $sequence_3 = { 8d8eb1000000 803901 8ad0 8896b8000000 c686b300000001 751c c60100 }
            // n = 7, score = 100
            //   8d8eb1000000         | lea                 ecx, [esi + 0xb1]
            //   803901               | cmp                 byte ptr [ecx], 1
            //   8ad0                 | mov                 dl, al
            //   8896b8000000         | mov                 byte ptr [esi + 0xb8], dl
            //   c686b300000001       | mov                 byte ptr [esi + 0xb3], 1
            //   751c                 | jne                 0x1e
            //   c60100               | mov                 byte ptr [ecx], 0

        $sequence_4 = { c1f805 8bf7 83e61f c1e606 03348540540210 c745e401000000 33db }
            // n = 7, score = 100
            //   c1f805               | sar                 eax, 5
            //   8bf7                 | mov                 esi, edi
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   03348540540210       | add                 esi, dword ptr [eax*4 + 0x10025440]
            //   c745e401000000       | mov                 dword ptr [ebp - 0x1c], 1
            //   33db                 | xor                 ebx, ebx

        $sequence_5 = { 8d5618 52 50 e8???????? 83c414 3d50020000 }
            // n = 6, score = 100
            //   8d5618               | lea                 edx, [esi + 0x18]
            //   52                   | push                edx
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   3d50020000           | cmp                 eax, 0x250

        $sequence_6 = { 83ec38 c744240401000000 48 8b442440 8b808c000000 89442418 48 }
            // n = 7, score = 100
            //   83ec38               | sub                 esp, 0x38
            //   c744240401000000     | mov                 dword ptr [esp + 4], 1
            //   48                   | dec                 eax
            //   8b442440             | mov                 eax, dword ptr [esp + 0x40]
            //   8b808c000000         | mov                 eax, dword ptr [eax + 0x8c]
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   48                   | dec                 eax

        $sequence_7 = { c6402801 33c0 83f801 0f843b010000 48 8b442418 48 }
            // n = 7, score = 100
            //   c6402801             | mov                 byte ptr [eax + 0x28], 1
            //   33c0                 | xor                 eax, eax
            //   83f801               | cmp                 eax, 1
            //   0f843b010000         | je                  0x141
            //   48                   | dec                 eax
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   48                   | dec                 eax

        $sequence_8 = { 398150100000 7622 48 8b4c2460 48 8b442450 8b4008 }
            // n = 7, score = 100
            //   398150100000         | cmp                 dword ptr [ecx + 0x1050], eax
            //   7622                 | jbe                 0x24
            //   48                   | dec                 eax
            //   8b4c2460             | mov                 ecx, dword ptr [esp + 0x60]
            //   48                   | dec                 eax
            //   8b442450             | mov                 eax, dword ptr [esp + 0x50]
            //   8b4008               | mov                 eax, dword ptr [eax + 8]

        $sequence_9 = { 6a20 8b4df8 83c14c 51 e8???????? 83c41c 8b55d8 }
            // n = 7, score = 100
            //   6a20                 | push                0x20
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   83c14c               | add                 ecx, 0x4c
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   8b55d8               | mov                 edx, dword ptr [ebp - 0x28]

    condition:
        7 of them and filesize < 573440
}

rule win_hikit_w0 {
	meta:
		author = "31ric"
		description = "Backdoor.Hikit is a Trojan horse that opens a back door on the compromised computer."
		source = "https://github.com/mattulm/sfiles_yara/blob/master/malware/hiddenlynxfiles.yar"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.hikit"
        malpedia_version = "20170517"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

	strings: 
		$f1 = "w7fw.sys" nocase ascii wide
		$f2 = "w7fw_m.inf" nocase ascii wide
		$f3 = "w7fw.inf" nocase ascii wide
		$f4 = "w7fw.cat" nocase ascii wide
		
	condition:
		1 of them
}