rule win_kardonloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.kardonloader."
        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.kardonloader"
        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 = { 68???????? 50 e8???????? 8d8500fcffff 50 ff35???????? ff35???????? }
            // n = 7, score = 200
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d8500fcffff         | lea                 eax, [ebp - 0x400]
            //   50                   | push                eax
            //   ff35????????         |                     
            //   ff35????????         |                     

        $sequence_1 = { 75c7 ff75fc e8???????? 8b5510 59 }
            // n = 5, score = 200
            //   75c7                 | jne                 0xffffffc9
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   59                   | pop                 ecx

        $sequence_2 = { c745f8???????? c745fc???????? ff74b5d8 ff15???????? }
            // n = 4, score = 200
            //   c745f8????????       |                     
            //   c745fc????????       |                     
            //   ff74b5d8             | push                dword ptr [ebp + esi*4 - 0x28]
            //   ff15????????         |                     

        $sequence_3 = { 59 59 85c0 0f84f7010000 56 57 }
            // n = 6, score = 200
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   0f84f7010000         | je                  0x1fd
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_4 = { 7861 ff7510 ff7510 e8???????? 59 50 }
            // n = 6, score = 200
            //   7861                 | js                  0x63
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax

        $sequence_5 = { 66897df0 ff15???????? 668945f2 8d45f0 6a10 50 }
            // n = 6, score = 200
            //   66897df0             | mov                 word ptr [ebp - 0x10], di
            //   ff15????????         |                     
            //   668945f2             | mov                 word ptr [ebp - 0xe], ax
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   6a10                 | push                0x10
            //   50                   | push                eax

        $sequence_6 = { 66837a0801 7507 c74704???????? 53 }
            // n = 4, score = 200
            //   66837a0801           | cmp                 word ptr [edx + 8], 1
            //   7507                 | jne                 9
            //   c74704????????       |                     
            //   53                   | push                ebx

        $sequence_7 = { ff15???????? 32c0 eb12 ff15???????? 3db7000000 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   32c0                 | xor                 al, al
            //   eb12                 | jmp                 0x14
            //   ff15????????         |                     
            //   3db7000000           | cmp                 eax, 0xb7

        $sequence_8 = { c745f8???????? c745fc???????? ff74b5d8 ff15???????? 85c0 750a }
            // n = 6, score = 200
            //   c745f8????????       |                     
            //   c745fc????????       |                     
            //   ff74b5d8             | push                dword ptr [ebp + esi*4 - 0x28]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc

        $sequence_9 = { 40 8945fc 894d08 8a01 }
            // n = 4, score = 200
            //   40                   | inc                 eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   8a01                 | mov                 al, byte ptr [ecx]

    condition:
        7 of them and filesize < 57344
}

rule win_kardonloader_w0 {
	meta:
		author = "TJ Nel"
    	company = "Arbor Networks"
		date = "2017-06-10"
		description = "Yara signature for Kardon Loader"
		sha256_0 = "fd0dfb173aff74429c6fed55608ee99a24e28f64ae600945e15bf5fce6406aee"
		sha256_1 = "3c64d7dbef4b7e0dd81a5076172451334fe9669800c40c895567226f7cb7cdc7"
		sha256_2 = "fd0dfb173aff74429c6fed55608ee99a24e28f64ae600945e15bf5fce6406aee"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kardonloader"
        malpedia_version = "20180620"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
	strings:
		$c0 = "&op=%d&td=%s" ascii
		$c1 = "uni=1" ascii
		$c2 = "id=%s&os=%s&pv=%s&ip=%s&cn=%s&un=%s&ca=%s" fullword ascii
		$a0 = "KVMKVMKVM" fullword ascii
		$a1 = "VMwareVMware" fullword ascii
		$a2 = "VBoxVBoxVBox" fullword ascii
		$a3 = "avghook" ascii
		$a4 = "sbiedll.dll" fullword ascii
		$s0 = "\\Documents\\Programming\\KRDN\\CLIENT" ascii
		$s1 = "POST %s HTTP/1.1" fullword ascii
		$s2 = "/gate.php" ascii
		$s3 = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run" fullword ascii
		$s4 = "notask" fullword ascii
		$s5 = "%s\\%s.exe" fullword ascii
		$s6 = ".rdata$zzzdbg" fullword ascii
	condition:
			( uint16(0) == 0x5a4d and (any of ($c*)) and (all of ($a*)) and (3 of ($s*)) )
}