rule win_nettraveler_auto {
meta:
author = "Felix Bilstein - yara-signator at cocacoding dot com"
date = "2021-10-07"
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 = "20211007"
malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
malpedia_version = "20211008"
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 8d850cfcffff 53 50 8975e0 e8???????? }
// n = 6, score = 100
// 56 | push esi
// 8d850cfcffff | lea eax, dword ptr [ebp - 0x3f4]
// 53 | push ebx
// 50 | push eax
// 8975e0 | mov dword ptr [ebp - 0x20], esi
// e8???????? |
$sequence_1 = { ab ab 33c0 8d7dd1 885dd0 6a08 }
// n = 6, score = 100
// ab | stosd dword ptr es:[edi], eax
// ab | stosd dword ptr es:[edi], eax
// 33c0 | xor eax, eax
// 8d7dd1 | lea edi, dword ptr [ebp - 0x2f]
// 885dd0 | mov byte ptr [ebp - 0x30], bl
// 6a08 | push 8
$sequence_2 = { 6a0a ff15???????? 68???????? 895de8 ff15???????? 68???????? }
// n = 6, score = 100
// 6a0a | push 0xa
// ff15???????? |
// 68???????? |
// 895de8 | mov dword ptr [ebp - 0x18], ebx
// ff15???????? |
// 68???????? |
$sequence_3 = { ffd6 50 ff15???????? 895dfc ff7508 ff15???????? ff75ec }
// n = 7, score = 100
// ffd6 | call esi
// 50 | push eax
// ff15???????? |
// 895dfc | mov dword ptr [ebp - 4], ebx
// ff7508 | push dword ptr [ebp + 8]
// ff15???????? |
// ff75ec | push dword ptr [ebp - 0x14]
$sequence_4 = { 8d8764910010 807c1dc400 7404 8b1a 091e }
// n = 5, score = 100
// 8d8764910010 | lea eax, dword ptr [edi + 0x10009164]
// 807c1dc400 | cmp byte ptr [ebp + ebx - 0x3c], 0
// 7404 | je 6
// 8b1a | mov ebx, dword ptr [edx]
// 091e | or dword ptr [esi], ebx
$sequence_5 = { 50 8d850cfcffff 50 ff15???????? 85c0 }
// n = 5, score = 100
// 50 | push eax
// 8d850cfcffff | lea eax, dword ptr [ebp - 0x3f4]
// 50 | push eax
// ff15???????? |
// 85c0 | test eax, eax
$sequence_6 = { 50 ff75fc ff750c ff7508 e8???????? 83c428 395dfc }
// n = 7, score = 100
// 50 | push eax
// ff75fc | push dword ptr [ebp - 4]
// ff750c | push dword ptr [ebp + 0xc]
// ff7508 | push dword ptr [ebp + 8]
// e8???????? |
// 83c428 | add esp, 0x28
// 395dfc | cmp dword ptr [ebp - 4], ebx
$sequence_7 = { 25003f0000 83e13f 0bf0 83c204 0bf1 8932 83c204 }
// n = 7, score = 100
// 25003f0000 | and eax, 0x3f00
// 83e13f | and ecx, 0x3f
// 0bf0 | or esi, eax
// 83c204 | add edx, 4
// 0bf1 | or esi, ecx
// 8932 | mov dword ptr [edx], esi
// 83c204 | add edx, 4
$sequence_8 = { e8???????? ff7514 8d45f4 50 8d45dc 50 ff7508 }
// n = 7, score = 100
// e8???????? |
// ff7514 | push dword ptr [ebp + 0x14]
// 8d45f4 | lea eax, dword ptr [ebp - 0xc]
// 50 | push eax
// 8d45dc | lea eax, dword ptr [ebp - 0x24]
// 50 | push eax
// ff7508 | push dword ptr [ebp + 8]
$sequence_9 = { dc0d???????? dd1c24 50 51 8d850cf1ffff 68???????? 50 }
// n = 7, score = 100
// dc0d???????? |
// dd1c24 | fstp qword ptr [esp]
// 50 | push eax
// 51 | push ecx
// 8d850cf1ffff | lea eax, dword ptr [ebp - 0xef4]
// 68???????? |
// 50 | push eax
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
}