rule win_nettraveler_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-01-05"
        version = "1"
        description = "Detects win.nettraveler."
        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.nettraveler"
        malpedia_rule_date = "20260105"
        malpedia_hash = "19b79e7cab4eaf532122e5b45a77dd8f6bb5cc79"
        malpedia_version = "20251219"
        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 = { ffd0 50 68???????? ff7510 ff15???????? ff7510 e8???????? }
            // n = 7, score = 100
            //   ffd0                 | call                eax
            //   50                   | push                eax
            //   68????????           |                     
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff15????????         |                     
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   e8????????           |                     

        $sequence_1 = { 5e 5d 83c440 c3 56 e8???????? e8???????? }
            // n = 7, score = 100
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   83c440               | add                 esp, 0x40
            //   c3                   | ret                 
            //   56                   | push                esi
            //   e8????????           |                     
            //   e8????????           |                     

        $sequence_2 = { 0bd1 0355b4 8dbc17aac7b6e9 8bd0 8bcf }
            // n = 5, score = 100
            //   0bd1                 | or                  edx, ecx
            //   0355b4               | add                 edx, dword ptr [ebp - 0x4c]
            //   8dbc17aac7b6e9       | lea                 edi, [edi + edx - 0x16493856]
            //   8bd0                 | mov                 edx, eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_3 = { aa 8bca 33c0 8dbdddefffff 80a5dcf3ffff00 f3ab }
            // n = 6, score = 100
            //   aa                   | stosb               byte ptr es:[edi], al
            //   8bca                 | mov                 ecx, edx
            //   33c0                 | xor                 eax, eax
            //   8dbdddefffff         | lea                 edi, [ebp - 0x1023]
            //   80a5dcf3ffff00       | and                 byte ptr [ebp - 0xc24], 0
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_4 = { ff37 56 ff15???????? 53 ff37 56 ff15???????? }
            // n = 7, score = 100
            //   ff37                 | push                dword ptr [edi]
            //   56                   | push                esi
            //   ff15????????         |                     
            //   53                   | push                ebx
            //   ff37                 | push                dword ptr [edi]
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_5 = { ffd6 bd???????? 8d442418 55 68???????? 50 ffd7 }
            // n = 7, score = 100
            //   ffd6                 | call                esi
            //   bd????????           |                     
            //   8d442418             | lea                 eax, [esp + 0x18]
            //   55                   | push                ebp
            //   68????????           |                     
            //   50                   | push                eax
            //   ffd7                 | call                edi

        $sequence_6 = { 53 6a03 53 53 ff75c0 ff75b8 ff7510 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   6a03                 | push                3
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   ff75c0               | push                dword ptr [ebp - 0x40]
            //   ff75b8               | push                dword ptr [ebp - 0x48]
            //   ff7510               | push                dword ptr [ebp + 0x10]

        $sequence_7 = { ff7508 ffd6 53 8d8590f6ffff 53 50 }
            // n = 6, score = 100
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd6                 | call                esi
            //   53                   | push                ebx
            //   8d8590f6ffff         | lea                 eax, [ebp - 0x970]
            //   53                   | push                ebx
            //   50                   | push                eax

        $sequence_8 = { 8db4850cffffff 8b4508 33d2 0fb6803c910010 8bf8 }
            // n = 5, score = 100
            //   8db4850cffffff       | lea                 esi, [ebp + eax*4 - 0xf4]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   33d2                 | xor                 edx, edx
            //   0fb6803c910010       | movzx               eax, byte ptr [eax + 0x1000913c]
            //   8bf8                 | mov                 edi, eax

        $sequence_9 = { ff75fc ff15???????? 85c0 7417 8d85f4fdffff 56 }
            // n = 6, score = 100
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7417                 | je                  0x19
            //   8d85f4fdffff         | lea                 eax, [ebp - 0x20c]
            //   56                   | push                esi

    condition:
        7 of them and filesize < 106496
}

/*
    This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as    long as you use it under this license.

*/

import "pe"

rule win_nettraveler_w0 {
    meta:
        description = "Identifiers for NetTraveler DLL"
        author = "Katie Kleemola"
        last_updated = "2014-05-20"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nettraveler"
        malpedia_version = "20170521"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    strings:
        //network strings
        $n1 = "?action=updated&hostid="
        $n2 = "travlerbackinfo"
        $n3 = "?action=getcmd&hostid="
        $n4 = "%s?action=gotcmd&hostid="
        $n5 = "%s?hostid=%s&hostname=%s&hostip=%s&filename=%s&filestart=%u&filetext="

        //debugging strings
        $d1 = "\x00Method1 Fail!!!!!\x00"
        $d2 = "\x00Method3 Fail!!!!!\x00"
        $d3 = "\x00method currect:\x00"
        $d4 = /\x00\x00[\w\-]+ is Running!\x00\x00/
        $d5 = "\x00OtherTwo\x00"

    condition:
        any of them
}

/*
    This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as    long as you use it under this license.

*/

rule win_nettraveler_w1 {
    meta:
        description = "Identifiers for netpass variant"
        author = "Katie Kleemola"
        last_updated = "2014-05-29"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nettraveler"
        malpedia_version = "20170521"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    strings:
        $exif1 = "Device Protect ApplicatioN" wide
        $exif2 = "beep.sys" wide //embedded exe name
        $exif3 = "BEEP Driver" wide //embedded exe description

        $string1 = "\x00NetPass Update\x00"
        $string2 = "\x00%s:DOWNLOAD\x00"
        $string3 = "\x00%s:UPDATE\x00"
        $string4 = "\x00%s:uNINSTALL\x00"

    condition:
        all of ($exif*) or any of ($string*)
}

/*
    This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as    long as you use it under this license.

*/

rule win_nettraveler_w2 {
	meta:
		description = "Export names for dll component"
		author = "Katie Kleemola"
		last_updated = "2014-05-20"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nettraveler"
        malpedia_version = "20170521"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
	
	strings:
		//dll component exports
		$d1 = "?InjectDll@@YAHPAUHWND__@@K@Z"
		$d2 = "?UnmapDll@@YAHXZ"
		$d3 = "?g_bSubclassed@@3HA"
		
	condition:
		any of them
}