rule win_hikit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 680c460100 53 53 8d4de8 51 8d4664 68ffff1f00 }
            // n = 7, score = 100
            //   680c460100           | push                0x1460c
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   8d4de8               | lea                 ecx, [ebp - 0x18]
            //   51                   | push                ecx
            //   8d4664               | lea                 eax, [esi + 0x64]
            //   68ffff1f00           | push                0x1fffff

        $sequence_1 = { ff90b0010000 817c24289a0000c0 740a c744244801000000 eb08 c744244800000000 8b442448 }
            // n = 7, score = 100
            //   ff90b0010000         | call                dword ptr [eax + 0x1b0]
            //   817c24289a0000c0     | cmp                 dword ptr [esp + 0x28], 0xc000009a
            //   740a                 | je                  0xc
            //   c744244801000000     | mov                 dword ptr [esp + 0x48], 1
            //   eb08                 | jmp                 0xa
            //   c744244800000000     | mov                 dword ptr [esp + 0x48], 0
            //   8b442448             | mov                 eax, dword ptr [esp + 0x48]

        $sequence_2 = { 05cc000000 50 ff15???????? 8b75f8 e8???????? 8b45f8 50 }
            // n = 7, score = 100
            //   05cc000000           | add                 eax, 0xcc
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b75f8               | mov                 esi, dword ptr [ebp - 8]
            //   e8????????           |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   50                   | push                eax

        $sequence_3 = { 48 8b542450 48 8b4c2420 e8???????? 89442448 8b442448 }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   8b542450             | mov                 edx, dword ptr [esp + 0x50]
            //   48                   | dec                 eax
            //   8b4c2420             | mov                 ecx, dword ptr [esp + 0x20]
            //   e8????????           |                     
            //   89442448             | mov                 dword ptr [esp + 0x48], eax
            //   8b442448             | mov                 eax, dword ptr [esp + 0x48]

        $sequence_4 = { 817c241011041120 0f854d010000 837c241400 0f8542010000 8b5c241c 33d2 6806020000 }
            // n = 7, score = 100
            //   817c241011041120     | cmp                 dword ptr [esp + 0x10], 0x20110411
            //   0f854d010000         | jne                 0x153
            //   837c241400           | cmp                 dword ptr [esp + 0x14], 0
            //   0f8542010000         | jne                 0x148
            //   8b5c241c             | mov                 ebx, dword ptr [esp + 0x1c]
            //   33d2                 | xor                 edx, edx
            //   6806020000           | push                0x206

        $sequence_5 = { 2bc2 d1f8 83f802 7521 8d9424780a0000 52 68???????? }
            // n = 7, score = 100
            //   2bc2                 | sub                 eax, edx
            //   d1f8                 | sar                 eax, 1
            //   83f802               | cmp                 eax, 2
            //   7521                 | jne                 0x23
            //   8d9424780a0000       | lea                 edx, [esp + 0xa78]
            //   52                   | push                edx
            //   68????????           |                     

        $sequence_6 = { 48 837c242000 740d 48 8b442420 48 c7404800000000 }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   837c242000           | cmp                 dword ptr [esp + 0x20], 0
            //   740d                 | je                  0xf
            //   48                   | dec                 eax
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   48                   | dec                 eax
            //   c7404800000000       | mov                 dword ptr [eax + 0x48], 0

        $sequence_7 = { 8bb3980a0000 8bbb940a0000 03f0 8d83780a0000 50 ff15???????? 8b4b04 }
            // n = 7, score = 100
            //   8bb3980a0000         | mov                 esi, dword ptr [ebx + 0xa98]
            //   8bbb940a0000         | mov                 edi, dword ptr [ebx + 0xa94]
            //   03f0                 | add                 esi, eax
            //   8d83780a0000         | lea                 eax, [ebx + 0xa78]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b4b04               | mov                 ecx, dword ptr [ebx + 4]

        $sequence_8 = { 817d0813010100 8b868c000000 8b4b20 8908 8b8688000000 8b4b24 }
            // n = 6, score = 100
            //   817d0813010100       | cmp                 dword ptr [ebp + 8], 0x10113
            //   8b868c000000         | mov                 eax, dword ptr [esi + 0x8c]
            //   8b4b20               | mov                 ecx, dword ptr [ebx + 0x20]
            //   8908                 | mov                 dword ptr [eax], ecx
            //   8b8688000000         | mov                 eax, dword ptr [esi + 0x88]
            //   8b4b24               | mov                 ecx, dword ptr [ebx + 0x24]

        $sequence_9 = { 8d8c2414010000 51 53 e8???????? 83c40c 83f8ff 7411 }
            // n = 7, score = 100
            //   8d8c2414010000       | lea                 ecx, [esp + 0x114]
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   83f8ff               | cmp                 eax, -1
            //   7411                 | je                  0x13

    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
}