rule win_hikit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 81ec18010000 a1???????? 33c5 894574 6810010000 8d8564ffffff }
            // n = 6, score = 100
            //   81ec18010000         | sub                 esp, 0x118
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   894574               | mov                 dword ptr [ebp + 0x74], eax
            //   6810010000           | push                0x110
            //   8d8564ffffff         | lea                 eax, [ebp - 0x9c]

        $sequence_1 = { 8b442450 898850100000 48 8b4c2450 48 83c150 45 }
            // n = 7, score = 100
            //   8b442450             | mov                 eax, dword ptr [esp + 0x50]
            //   898850100000         | mov                 dword ptr [eax + 0x1050], ecx
            //   48                   | dec                 eax
            //   8b4c2450             | mov                 ecx, dword ptr [esp + 0x50]
            //   48                   | dec                 eax
            //   83c150               | add                 ecx, 0x50
            //   45                   | inc                 ebp

        $sequence_2 = { 33c0 c705????????01000000 8b8c24c0020000 64890d00000000 59 5f 5e }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   c705????????01000000     |     
            //   8b8c24c0020000       | mov                 ecx, dword ptr [esp + 0x2c0]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx
            //   59                   | pop                 ecx
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_3 = { bf40700100 8bcf c786e00000000b000140 8986bc000000 8986c0000000 ff15???????? a2???????? }
            // n = 7, score = 100
            //   bf40700100           | mov                 edi, 0x17040
            //   8bcf                 | mov                 ecx, edi
            //   c786e00000000b000140     | mov    dword ptr [esi + 0xe0], 0x4001000b
            //   8986bc000000         | mov                 dword ptr [esi + 0xbc], eax
            //   8986c0000000         | mov                 dword ptr [esi + 0xc0], eax
            //   ff15????????         |                     
            //   a2????????           |                     

        $sequence_4 = { 8908 8b45fc 8b4df4 894808 8b45fc 88581c 8b45fc }
            // n = 7, score = 100
            //   8908                 | mov                 dword ptr [eax], ecx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   88581c               | mov                 byte ptr [eax + 0x1c], bl
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

        $sequence_5 = { e8???????? 83c404 c745e400000000 c745f000000000 c745fcffffffff e9???????? c745d400000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   c745e400000000       | mov                 dword ptr [ebp - 0x1c], 0
            //   c745f000000000       | mov                 dword ptr [ebp - 0x10], 0
            //   c745fcffffffff       | mov                 dword ptr [ebp - 4], 0xffffffff
            //   e9????????           |                     
            //   c745d400000000       | mov                 dword ptr [ebp - 0x2c], 0

        $sequence_6 = { 48 639084000000 48 8b4c2458 48 8b442450 }
            // n = 6, score = 100
            //   48                   | dec                 eax
            //   639084000000         | arpl                word ptr [eax + 0x84], dx
            //   48                   | dec                 eax
            //   8b4c2458             | mov                 ecx, dword ptr [esp + 0x58]
            //   48                   | dec                 eax
            //   8b442450             | mov                 eax, dword ptr [esp + 0x50]

        $sequence_7 = { 6800200000 50 e8???????? 83c420 03f0 f644244010 7422 }
            // n = 7, score = 100
            //   6800200000           | push                0x2000
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20
            //   03f0                 | add                 esi, eax
            //   f644244010           | test                byte ptr [esp + 0x40], 0x10
            //   7422                 | je                  0x24

        $sequence_8 = { 7429 8b55fc 8b02 3b4508 7511 8b4dfc 0fb69194000000 }
            // n = 7, score = 100
            //   7429                 | je                  0x2b
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   3b4508               | cmp                 eax, dword ptr [ebp + 8]
            //   7511                 | jne                 0x13
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   0fb69194000000       | movzx               edx, byte ptr [ecx + 0x94]

        $sequence_9 = { 66894c4420 8944240c b909000000 ba???????? 8d742420 }
            // n = 5, score = 100
            //   66894c4420           | mov                 word ptr [esp + eax*2 + 0x20], cx
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   b909000000           | mov                 ecx, 9
            //   ba????????           |                     
            //   8d742420             | lea                 esi, [esp + 0x20]

    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
}