[TLP:WHITE] win_nettraveler_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_nettraveler_auto {
meta:
author = "Felix Bilstein - yara-signator at cocacoding dot com"
date = "2020-10-14"
version = "1"
description = "autogenerated rule brought to you by yara-signator"
tool = "yara-signator v0.5.0"
tool_config = "callsandjumps;datarefs;binvalue"
malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nettraveler"
malpedia_rule_date = "20201014"
malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
malpedia_version = "20201014"
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 = { 0bd9 6a40 33d8 6a00 }
// n = 4, score = 100
// 0bd9 | or ebx, ecx
// 6a40 | push 0x40
// 33d8 | xor ebx, eax
// 6a00 | push 0
$sequence_1 = { d1e9 0bf1 b9ff00ff00 8bc6 23f9 c1e808 23c1 }
// n = 7, score = 100
// d1e9 | shr ecx, 1
// 0bf1 | or esi, ecx
// b9ff00ff00 | mov ecx, 0xff00ff
// 8bc6 | mov eax, esi
// 23f9 | and edi, ecx
// c1e808 | shr eax, 8
// 23c1 | and eax, ecx
$sequence_2 = { c1e002 3bc6 7e6a 8d341b 33c0 85f6 7e61 }
// n = 7, score = 100
// c1e002 | shl eax, 2
// 3bc6 | cmp eax, esi
// 7e6a | jle 0x6c
// 8d341b | lea esi, [ebx + ebx]
// 33c0 | xor eax, eax
// 85f6 | test esi, esi
// 7e61 | jle 0x63
$sequence_3 = { 85c0 0f840c070000 8b45e0 68???????? 68???????? 881d???????? 889c050cfcffff }
// n = 7, score = 100
// 85c0 | test eax, eax
// 0f840c070000 | je 0x712
// 8b45e0 | mov eax, dword ptr [ebp - 0x20]
// 68???????? |
// 68???????? |
// 881d???????? |
// 889c050cfcffff | mov byte ptr [ebp + eax - 0x3f4], bl
$sequence_4 = { a1???????? 897804 a1???????? c7400803000000 8bc7 0fafc6 }
// n = 6, score = 100
// a1???????? |
// 897804 | mov dword ptr [eax + 4], edi
// a1???????? |
// c7400803000000 | mov dword ptr [eax + 8], 3
// 8bc7 | mov eax, edi
// 0fafc6 | imul eax, esi
$sequence_5 = { 57 51 ff7508 ffd0 85c0 7417 8b45e8 }
// n = 7, score = 100
// 57 | push edi
// 51 | push ecx
// ff7508 | push dword ptr [ebp + 8]
// ffd0 | call eax
// 85c0 | test eax, eax
// 7417 | je 0x19
// 8b45e8 | mov eax, dword ptr [ebp - 0x18]
$sequence_6 = { 7c8d 53 6800000040 ff75ec ff75e8 }
// n = 5, score = 100
// 7c8d | jl 0xffffff8f
// 53 | push ebx
// 6800000040 | push 0x40000000
// ff75ec | push dword ptr [ebp - 0x14]
// ff75e8 | push dword ptr [ebp - 0x18]
$sequence_7 = { ffd6 33c0 eb72 ff75fc 895df4 57 }
// n = 6, score = 100
// ffd6 | call esi
// 33c0 | xor eax, eax
// eb72 | jmp 0x74
// ff75fc | push dword ptr [ebp - 4]
// 895df4 | mov dword ptr [ebp - 0xc], ebx
// 57 | push edi
$sequence_8 = { c3 55 8bec 83ec48 56 33f6 56 }
// n = 7, score = 100
// c3 | ret
// 55 | push ebp
// 8bec | mov ebp, esp
// 83ec48 | sub esp, 0x48
// 56 | push esi
// 33f6 | xor esi, esi
// 56 | push esi
$sequence_9 = { d2e3 8a4d0c 024d18 0806 d2ea 0ac3 0ad0 }
// n = 7, score = 100
// d2e3 | shl bl, cl
// 8a4d0c | mov cl, byte ptr [ebp + 0xc]
// 024d18 | add cl, byte ptr [ebp + 0x18]
// 0806 | or byte ptr [esi], al
// d2ea | shr dl, cl
// 0ac3 | or al, bl
// 0ad0 | or dl, al
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
}