rule win_cadelspy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.cadelspy."
        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.cadelspy"
        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 = { 03c7 66890c43 47 eb08 85ff 7e02 }
            // n = 6, score = 100
            //   03c7                 | add                 eax, edi
            //   66890c43             | mov                 word ptr [ebx + eax*2], cx
            //   47                   | inc                 edi
            //   eb08                 | jmp                 0xa
            //   85ff                 | test                edi, edi
            //   7e02                 | jle                 4

        $sequence_1 = { ff750c be04010000 8bce e8???????? 8b550c 59 }
            // n = 6, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   be04010000           | mov                 esi, 0x104
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   59                   | pop                 ecx

        $sequence_2 = { 2b34bd004c0110 c1fe06 8bc7 c1e005 03f0 8975e4 837de4ff }
            // n = 7, score = 100
            //   2b34bd004c0110       | sub                 esi, dword ptr [edi*4 + 0x10014c00]
            //   c1fe06               | sar                 esi, 6
            //   8bc7                 | mov                 eax, edi
            //   c1e005               | shl                 eax, 5
            //   03f0                 | add                 esi, eax
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   837de4ff             | cmp                 dword ptr [ebp - 0x1c], -1

        $sequence_3 = { 8d9c2464020000 e8???????? 68???????? 8d9c2464020000 e8???????? }
            // n = 5, score = 100
            //   8d9c2464020000       | lea                 ebx, [esp + 0x264]
            //   e8????????           |                     
            //   68????????           |                     
            //   8d9c2464020000       | lea                 ebx, [esp + 0x264]
            //   e8????????           |                     

        $sequence_4 = { ff15???????? 50 ff15???????? c9 c3 a1???????? }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   c9                   | leave               
            //   c3                   | ret                 
            //   a1????????           |                     

        $sequence_5 = { 83658000 8d4584 53 50 e8???????? 0fbe4584 }
            // n = 6, score = 100
            //   83658000             | and                 dword ptr [ebp - 0x80], 0
            //   8d4584               | lea                 eax, [ebp - 0x7c]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   e8????????           |                     
            //   0fbe4584             | movsx               eax, byte ptr [ebp - 0x7c]

        $sequence_6 = { 68???????? eb44 837d8c06 7543 68???????? eb37 8d856c030000 }
            // n = 7, score = 100
            //   68????????           |                     
            //   eb44                 | jmp                 0x46
            //   837d8c06             | cmp                 dword ptr [ebp - 0x74], 6
            //   7543                 | jne                 0x45
            //   68????????           |                     
            //   eb37                 | jmp                 0x39
            //   8d856c030000         | lea                 eax, [ebp + 0x36c]

        $sequence_7 = { 8bcf 8d950cf9ffff e8???????? 33c0 }
            // n = 4, score = 100
            //   8bcf                 | mov                 ecx, edi
            //   8d950cf9ffff         | lea                 edx, [ebp - 0x6f4]
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax

        $sequence_8 = { bf04010000 57 8d8504f7ffff 50 53 }
            // n = 5, score = 100
            //   bf04010000           | mov                 edi, 0x104
            //   57                   | push                edi
            //   8d8504f7ffff         | lea                 eax, [ebp - 0x8fc]
            //   50                   | push                eax
            //   53                   | push                ebx

        $sequence_9 = { 8d7902 668b31 41 41 6685f6 }
            // n = 5, score = 100
            //   8d7902               | lea                 edi, [ecx + 2]
            //   668b31               | mov                 si, word ptr [ecx]
            //   41                   | inc                 ecx
            //   41                   | inc                 ecx
            //   6685f6               | test                si, si

    condition:
        7 of them and filesize < 204800
}

rule win_cadelspy_w0 {
    meta:
        author = "Symantec"
        source = "http://www.symantec.com/content/en/us/enterprise/media/security_response/docs/CadelSpy-Remexi-IOC.pdf"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cadelspy"
        malpedia_version = "20170410"
        malpedia_sharing = "TLP:WHITE"
        malpedia_license = ""
    strings:
        $s1 = { 
                56 57 8B F8 8B F1 33 C0 3B F0 74 22 39 44 24 0C
                74 18 0F B7 0F 66 3B C8 74 10 66 89 0A 42 42 47
                47 4E FF 4C 24 0C 3B F0 75 E2 3B F0 75 07 4A 4A
                B8 7A 00 07 80 33 C9 5F 66 89 0A 5E C2 04 00
              }
        $s2 = "ntsvc32"
        $s3 = "ntbind32"
    condition:
        $s1 and ($s2 or $s3)
}

rule win_cadelspy_w1 {
    meta:
        author = "Symantec"
        source = "http://www.symantec.com/content/en/us/enterprise/media/security_response/docs/CadelSpy-Remexi-IOC.pdf"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cadelspy"
        malpedia_version = "20170410"
        malpedia_sharing = "TLP:WHITE"
        malpedia_license = ""
    strings:
        $s1  = "[EXECUTE]" wide ascii
        $s2  = "WebCamCapture" wide ascii
        $s3  = "</DAY>" wide ascii
        $s4  =
        "</DOCUMENT>" wide ascii
        $s5  = "<DOCUMENT>" wide ascii
        $s6  = "<DATETIME>" wide ascii
        $s7  = "Can't open file for reading :" wide ascii
        $s8  = "</DATETIME>" wide ascii
        $s9  = "</USERNAME>" wide ascii
        $s10 = "JpegFile :" wide ascii
        $s12 = "[SCROLL]" wide ascii
        $s13 = "<YEAR>" wide ascii
        $s14 = "CURRENT DATE" wide ascii
        $s15 = "</YEAR>" wide ascii
        $s16 = "</MONTH>" wide ascii
        $s17 = "<PRINTERNAME>" wide ascii
        $s18 = "</DRIVE>" wide ascii
        $s19 = "<DATATYPE>" wide ascii
        $s20 = "<MACADDRESS>" wide ascii
        $s21 = "FlashMemory" wide ascii
    condition:
        12 of them
}

rule win_cadelspy_w2 {
    meta:
        author = "Symantec"
        source = "http://www.symantec.com/content/en/us/enterprise/media/security_response/docs/CadelSpy-Remexi-IOC.pdf"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cadelspy"
        malpedia_version = "20170410"
        malpedia_sharing = "TLP:WHITE"
        malpedia_license = ""
    strings:
        $s1  = "SOFTWARE\\ntsvc32\\HDD" wide ascii
        $s2  = "SOFTWARE\\ntsvc32\\ROU" wide ascii
        $s3  = "SOFTWARE\\ntsvc32\\HST" wide ascii
        $s4  = "SOFTWARE\\ntsvc32\\FLS" wide ascii
        $s5  = "ntsvc32" wide ascii
        $s6  = ".Win$py." wide ascii
        $s7  = "C:\\users\\" wide ascii
        $s8  = "%system32%" wide ascii
        $s9  = "\\Local Settings\\Temp" wide ascii
        $s10 = "SVWATAUAVAW" wide ascii
        $s11 = "\\AppData\\Local" wide ascii
        $s12 = "\\AppData" wide ascii
    condition:
        6 of them
}

rule win_cadelspy_w3 {
    meta:
        author = "Symantec"
        source = "http://www.symantec.com/content/en/us/enterprise/media/security_response/docs/CadelSpy-Remexi-IOC.pdf"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cadelspy"
        malpedia_version = "20170410"
        malpedia_sharing = "TLP:WHITE"
        malpedia_license = ""
    strings:
        $s1 = "AppInit_DLLs" wide ascii
        $s2 = { 5C 00 62 00 61 00 63 00 6B 00 75 00 70 00 00 }
        $s3 = { 5C 00 75 00 70 00 64 00 61 00 74 00 65 00 00 }
        $s4 = "\\cmd.exe" wide ascii
    condition:
        all of them
}