rule win_hikit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 56 ff15???????? 8d442420 50 c7451401000000 8b8b980a0000 038b940a0000 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8d442420             | lea                 eax, dword ptr [esp + 0x20]
            //   50                   | push                eax
            //   c7451401000000       | mov                 dword ptr [ebp + 0x14], 1
            //   8b8b980a0000         | mov                 ecx, dword ptr [ebx + 0xa98]
            //   038b940a0000         | add                 ecx, dword ptr [ebx + 0xa94]

        $sequence_1 = { 53 50 51 e8???????? 33d2 83c40c 3bc3 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   50                   | push                eax
            //   51                   | push                ecx
            //   e8????????           |                     
            //   33d2                 | xor                 edx, edx
            //   83c40c               | add                 esp, 0xc
            //   3bc3                 | cmp                 eax, ebx

        $sequence_2 = { 5e 56 8d45f8 50 ff15???????? 85c0 0f85b8fdffff }
            // n = 7, score = 100
            //   5e                   | pop                 esi
            //   56                   | push                esi
            //   8d45f8               | lea                 eax, dword ptr [ebp - 8]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f85b8fdffff         | jne                 0xfffffdbe

        $sequence_3 = { 8b4c2440 e8???????? 4c 8b5c2440 41 0fb64368 83f804 }
            // n = 7, score = 100
            //   8b4c2440             | mov                 ecx, dword ptr [esp + 0x40]
            //   e8????????           |                     
            //   4c                   | dec                 esp
            //   8b5c2440             | mov                 ebx, dword ptr [esp + 0x40]
            //   41                   | inc                 ecx
            //   0fb64368             | movzx               eax, byte ptr [ebx + 0x68]
            //   83f804               | cmp                 eax, 4

        $sequence_4 = { 83b84c01000001 0f8e28010000 837c242001 750c 48 8b442450 c6803201000001 }
            // n = 7, score = 100
            //   83b84c01000001       | cmp                 dword ptr [eax + 0x14c], 1
            //   0f8e28010000         | jle                 0x12e
            //   837c242001           | cmp                 dword ptr [esp + 0x20], 1
            //   750c                 | jne                 0xe
            //   48                   | dec                 eax
            //   8b442450             | mov                 eax, dword ptr [esp + 0x50]
            //   c6803201000001       | mov                 byte ptr [eax + 0x132], 1

        $sequence_5 = { 48 8b8424d8000000 8b4004 898424b0000000 83bc24b000000036 7307 }
            // n = 6, score = 100
            //   48                   | dec                 eax
            //   8b8424d8000000       | mov                 eax, dword ptr [esp + 0xd8]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   898424b0000000       | mov                 dword ptr [esp + 0xb0], eax
            //   83bc24b000000036     | cmp                 dword ptr [esp + 0xb0], 0x36
            //   7307                 | jae                 9

        $sequence_6 = { 48 894c2408 48 83ec68 4c 8b442470 4d }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   894c2408             | mov                 dword ptr [esp + 8], ecx
            //   48                   | dec                 eax
            //   83ec68               | sub                 esp, 0x68
            //   4c                   | dec                 esp
            //   8b442470             | mov                 eax, dword ptr [esp + 0x70]
            //   4d                   | dec                 ebp

        $sequence_7 = { 1bc0 40 894608 e9???????? 8bfd 8bc6 e8???????? }
            // n = 7, score = 100
            //   1bc0                 | sbb                 eax, eax
            //   40                   | inc                 eax
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   e9????????           |                     
            //   8bfd                 | mov                 edi, ebp
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     

        $sequence_8 = { 898180010000 48 8b442460 c70004000000 48 8b442468 }
            // n = 6, score = 100
            //   898180010000         | mov                 dword ptr [ecx + 0x180], eax
            //   48                   | dec                 eax
            //   8b442460             | mov                 eax, dword ptr [esp + 0x60]
            //   c70004000000         | mov                 dword ptr [eax], 4
            //   48                   | dec                 eax
            //   8b442468             | mov                 eax, dword ptr [esp + 0x68]

        $sequence_9 = { 50 6a00 6a00 8b8de07fffff 51 8d95e87fffff 52 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8b8de07fffff         | mov                 ecx, dword ptr [ebp - 0x8020]
            //   51                   | push                ecx
            //   8d95e87fffff         | lea                 edx, dword ptr [ebp - 0x8018]
            //   52                   | push                edx

    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
}