rule win_nettraveler_auto {
meta:
author = "Felix Bilstein - yara-signator at cocacoding dot com"
date = "2021-06-10"
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 = "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 57 8d85f4fdffff 6804010000 50 ff15???????? 8b35???????? }
// n = 7, score = 100
// 56 | push esi
// 57 | push edi
// 8d85f4fdffff | lea eax, dword ptr [ebp - 0x20c]
// 6804010000 | push 0x104
// 50 | push eax
// ff15???????? |
// 8b35???????? |
$sequence_1 = { ff75fc e8???????? 83c40c 8945f8 eb0d 53 68???????? }
// n = 7, score = 100
// ff75fc | push dword ptr [ebp - 4]
// e8???????? |
// 83c40c | add esp, 0xc
// 8945f8 | mov dword ptr [ebp - 8], eax
// eb0d | jmp 0xf
// 53 | push ebx
// 68???????? |
$sequence_2 = { 50 ffd6 8d45f8 50 8d85ccfeffff 50 }
// n = 6, score = 100
// 50 | push eax
// ffd6 | call esi
// 8d45f8 | lea eax, dword ptr [ebp - 8]
// 50 | push eax
// 8d85ccfeffff | lea eax, dword ptr [ebp - 0x134]
// 50 | push eax
$sequence_3 = { 03f7 ff4d0c 75ba 66837d1801 7558 837dfc00 7e52 }
// n = 7, score = 100
// 03f7 | add esi, edi
// ff4d0c | dec dword ptr [ebp + 0xc]
// 75ba | jne 0xffffffbc
// 66837d1801 | cmp word ptr [ebp + 0x18], 1
// 7558 | jne 0x5a
// 837dfc00 | cmp dword ptr [ebp - 4], 0
// 7e52 | jle 0x54
$sequence_4 = { ff742414 ffd3 59 85c0 59 752c 55 }
// n = 7, score = 100
// ff742414 | push dword ptr [esp + 0x14]
// ffd3 | call ebx
// 59 | pop ecx
// 85c0 | test eax, eax
// 59 | pop ecx
// 752c | jne 0x2e
// 55 | push ebp
$sequence_5 = { 7522 e8???????? 393d???????? 7410 e8???????? 85c0 7507 }
// n = 7, score = 100
// 7522 | jne 0x24
// e8???????? |
// 393d???????? |
// 7410 | je 0x12
// e8???????? |
// 85c0 | test eax, eax
// 7507 | jne 9
$sequence_6 = { 8d45b8 6a10 50 68???????? e8???????? 83c418 ff75f4 }
// n = 7, score = 100
// 8d45b8 | lea eax, dword ptr [ebp - 0x48]
// 6a10 | push 0x10
// 50 | push eax
// 68???????? |
// e8???????? |
// 83c418 | add esp, 0x18
// ff75f4 | push dword ptr [ebp - 0xc]
$sequence_7 = { 68???????? 57 ffd6 5f 5e 5b c3 }
// n = 7, score = 100
// 68???????? |
// 57 | push edi
// ffd6 | call esi
// 5f | pop edi
// 5e | pop esi
// 5b | pop ebx
// c3 | ret
$sequence_8 = { 3bdf 7d02 8bfb 8b4508 57 ff7514 }
// n = 6, score = 100
// 3bdf | cmp ebx, edi
// 7d02 | jge 4
// 8bfb | mov edi, ebx
// 8b4508 | mov eax, dword ptr [ebp + 8]
// 57 | push edi
// ff7514 | push dword ptr [ebp + 0x14]
$sequence_9 = { 8945f8 0f8223ffffff eb28 8d858cf7ffff 50 ff750c }
// n = 6, score = 100
// 8945f8 | mov dword ptr [ebp - 8], eax
// 0f8223ffffff | jb 0xffffff29
// eb28 | jmp 0x2a
// 8d858cf7ffff | lea eax, dword ptr [ebp - 0x874]
// 50 | push eax
// ff750c | push dword ptr [ebp + 0xc]
condition:
7 of them and filesize < 106496
}
[TLP:WHITE] win_nettraveler_w0 (20170521 | Identifiers for NetTraveler DLL)
/*
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
}
[TLP:WHITE] win_nettraveler_w1 (20170521 | Identifiers for netpass variant)
/*
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*)
}
[TLP:WHITE] win_nettraveler_w2 (20170521 | Export names for dll component)
/*
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
}