rule win_hikit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { 8b442420 83b84801000001 7578 8b4c2428 48 8b442420 0fb6840810010000 }
            // n = 7, score = 100
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   83b84801000001       | cmp                 dword ptr [eax + 0x148], 1
            //   7578                 | jne                 0x7a
            //   8b4c2428             | mov                 ecx, dword ptr [esp + 0x28]
            //   48                   | dec                 eax
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   0fb6840810010000     | movzx               eax, byte ptr [eax + ecx + 0x110]

        $sequence_1 = { 89442438 48 8b442460 81b85010000000000200 7209 8b442444 e9???????? }
            // n = 7, score = 100
            //   89442438             | mov                 dword ptr [esp + 0x38], eax
            //   48                   | dec                 eax
            //   8b442460             | mov                 eax, dword ptr [esp + 0x60]
            //   81b85010000000000200     | cmp    dword ptr [eax + 0x1050], 0x20000
            //   7209                 | jb                  0xb
            //   8b442444             | mov                 eax, dword ptr [esp + 0x44]
            //   e9????????           |                     

        $sequence_2 = { 8b8c24d8000000 e8???????? eb12 48 8b8424d8000000 8b4004 898424b0000000 }
            // n = 7, score = 100
            //   8b8c24d8000000       | mov                 ecx, dword ptr [esp + 0xd8]
            //   e8????????           |                     
            //   eb12                 | jmp                 0x14
            //   48                   | dec                 eax
            //   8b8424d8000000       | mov                 eax, dword ptr [esp + 0xd8]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   898424b0000000       | mov                 dword ptr [esp + 0xb0], eax

        $sequence_3 = { ff15???????? 89442420 48 c705????????00000000 48 8d0d3e480000 ff15???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   48                   | dec                 eax
            //   c705????????00000000     |     
            //   48                   | dec                 eax
            //   8d0d3e480000         | lea                 ecx, [0x483e]
            //   ff15????????         |                     

        $sequence_4 = { 8b45fc 0fb7480c 53 51 83c004 50 ffd7 }
            // n = 7, score = 100
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   0fb7480c             | movzx               ecx, word ptr [eax + 0xc]
            //   53                   | push                ebx
            //   51                   | push                ecx
            //   83c004               | add                 eax, 4
            //   50                   | push                eax
            //   ffd7                 | call                edi

        $sequence_5 = { 48 894c2408 48 81ecc8000000 c78424b000000000000000 48 c744243800000000 }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   894c2408             | mov                 dword ptr [esp + 8], ecx
            //   48                   | dec                 eax
            //   81ecc8000000         | sub                 esp, 0xc8
            //   c78424b000000000000000     | mov    dword ptr [esp + 0xb0], 0
            //   48                   | dec                 eax
            //   c744243800000000     | mov                 dword ptr [esp + 0x38], 0

        $sequence_6 = { 0f8485000000 38591c 7568 8b4108 895df8 895df4 895dfc }
            // n = 7, score = 100
            //   0f8485000000         | je                  0x8b
            //   38591c               | cmp                 byte ptr [ecx + 0x1c], bl
            //   7568                 | jne                 0x6a
            //   8b4108               | mov                 eax, dword ptr [ecx + 8]
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx

        $sequence_7 = { 85c0 0f84f5000000 b9???????? 8d44246c 8d642400 668b10 663b11 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f84f5000000         | je                  0xfb
            //   b9????????           |                     
            //   8d44246c             | lea                 eax, [esp + 0x6c]
            //   8d642400             | lea                 esp, [esp]
            //   668b10               | mov                 dx, word ptr [eax]
            //   663b11               | cmp                 dx, word ptr [ecx]

        $sequence_8 = { 83c414 397d0c 0f8524ffffff 8b5dd0 6a0c e8???????? 59 }
            // n = 7, score = 100
            //   83c414               | add                 esp, 0x14
            //   397d0c               | cmp                 dword ptr [ebp + 0xc], edi
            //   0f8524ffffff         | jne                 0xffffff2a
            //   8b5dd0               | mov                 ebx, dword ptr [ebp - 0x30]
            //   6a0c                 | push                0xc
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_9 = { e8???????? 59 59 85c0 7456 8b4de0 8d0c8d40540210 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   7456                 | je                  0x58
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   8d0c8d40540210       | lea                 ecx, [ecx*4 + 0x10025440]

    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
}