[TLP:WHITE] win_nettraveler_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_nettraveler_auto {
meta:
author = "Felix Bilstein - yara-signator at cocacoding dot com"
date = "2020-12-22"
version = "1"
description = "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 = "20201222"
malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
malpedia_version = "20201023"
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 = { e8???????? 68???????? 56 e8???????? 83c41c ff750c ff7508 }
// n = 7, score = 100
// e8???????? |
// 68???????? |
// 56 | push esi
// e8???????? |
// 83c41c | add esp, 0x1c
// ff750c | push dword ptr [ebp + 0xc]
// ff7508 | push dword ptr [ebp + 8]
$sequence_1 = { 83c102 8b15???????? 8b520c 8a54022a c0ea03 80e201 }
// n = 6, score = 100
// 83c102 | add ecx, 2
// 8b15???????? |
// 8b520c | mov edx, dword ptr [edx + 0xc]
// 8a54022a | mov dl, byte ptr [edx + eax + 0x2a]
// c0ea03 | shr dl, 3
// 80e201 | and dl, 1
$sequence_2 = { 53 8d85a0f6ffff 53 50 e8???????? 59 50 }
// n = 7, score = 100
// 53 | push ebx
// 8d85a0f6ffff | lea eax, [ebp - 0x960]
// 53 | push ebx
// 50 | push eax
// e8???????? |
// 59 | pop ecx
// 50 | push eax
$sequence_3 = { 0fb7ce 8d3449 8bcf d1e6 0fb70430 50 ff7510 }
// n = 7, score = 100
// 0fb7ce | movzx ecx, si
// 8d3449 | lea esi, [ecx + ecx*2]
// 8bcf | mov ecx, edi
// d1e6 | shl esi, 1
// 0fb70430 | movzx eax, word ptr [eax + esi]
// 50 | push eax
// ff7510 | push dword ptr [ebp + 0x10]
$sequence_4 = { ffd6 8d4508 6a04 50 6a05 ff750c }
// n = 6, score = 100
// ffd6 | call esi
// 8d4508 | lea eax, [ebp + 8]
// 6a04 | push 4
// 50 | push eax
// 6a05 | push 5
// ff750c | push dword ptr [ebp + 0xc]
$sequence_5 = { 750b ff45fc 837dfc03 7d34 ebd5 8b45f0 2b4508 }
// n = 7, score = 100
// 750b | jne 0xd
// ff45fc | inc dword ptr [ebp - 4]
// 837dfc03 | cmp dword ptr [ebp - 4], 3
// 7d34 | jge 0x36
// ebd5 | jmp 0xffffffd7
// 8b45f0 | mov eax, dword ptr [ebp - 0x10]
// 2b4508 | sub eax, dword ptr [ebp + 8]
$sequence_6 = { 895d10 ff7518 ff15???????? 85c0 }
// n = 4, score = 100
// 895d10 | mov dword ptr [ebp + 0x10], ebx
// ff7518 | push dword ptr [ebp + 0x18]
// ff15???????? |
// 85c0 | test eax, eax
$sequence_7 = { 50 8d850cfaffff 50 ff15???????? 85c0 0f84b1070000 8b45d8 }
// n = 7, score = 100
// 50 | push eax
// 8d850cfaffff | lea eax, [ebp - 0x5f4]
// 50 | push eax
// ff15???????? |
// 85c0 | test eax, eax
// 0f84b1070000 | je 0x7b7
// 8b45d8 | mov eax, dword ptr [ebp - 0x28]
$sequence_8 = { 33c0 59 8dbd7cffffff ff7514 f3ab 8d8578ffffff 50 }
// n = 7, score = 100
// 33c0 | xor eax, eax
// 59 | pop ecx
// 8dbd7cffffff | lea edi, [ebp - 0x84]
// ff7514 | push dword ptr [ebp + 0x14]
// f3ab | rep stosd dword ptr es:[edi], eax
// 8d8578ffffff | lea eax, [ebp - 0x88]
// 50 | push eax
$sequence_9 = { 59 33c0 8d7dac 895dfc f3ab 8d8584f6ffff 8d8d80f5ffff }
// n = 7, score = 100
// 59 | pop ecx
// 33c0 | xor eax, eax
// 8d7dac | lea edi, [ebp - 0x54]
// 895dfc | mov dword ptr [ebp - 4], ebx
// f3ab | rep stosd dword ptr es:[edi], eax
// 8d8584f6ffff | lea eax, [ebp - 0x97c]
// 8d8d80f5ffff | lea ecx, [ebp - 0xa80]
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
}