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{4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}gw.sys

Mountain Bike

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}gw.sys by Mountain Bike has been detected as adware by 27 anti-malware scanners. It runs as a Windows kernel mode device driver named “{4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}Gw”. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
StdLib  (signed by Mountain Bike)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
eea715ff34348fe5d7722a455af85a61

SHA-1:
7b92dec8acad2d03fb3fbe0d543d5d2f3b8a48fc

SHA-256:
1e16961d59511d289715c533c272072f1cba55a5fee04b3f5728839e400badf1

Scanner detections:
27 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/30/2024 7:11:56 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
6221187

Agnitum Outpost
PUA.BrowseFox
7.1.1

AhnLab V3 Security
PUP/Win32.BrowseFox
2015.04.09

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.176.146

AVG
Generic
2016.0.3145

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.1548

Bitdefender
Adware.BrowseFox.V
1.0.20.490

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/20296

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
21695

Dr.Web
Trojan.Yontoo.1742
9.0.1.05190

Emsisoft Anti-Malware
Adware.BrowseFox.V
9.0.0.4799

ESET NOD32
Win32/NetFilter.A potentially unsafe application
7.0.302.0

F-Prot
W32/A-248e95ab
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
5.13.68

G Data
Adware.BrowseFox
15.4.25

herdProtect (fuzzy)
variant of {e9bebce7-deb3-4ab9-896c-549739f208c5}gw.sys (Adware)
2015.7.11.19

K7 AntiVirus
Unwanted-Program
13.202.15527

MicroWorld eScan
Adware.BrowseFox.V
16.0.0.294

NANO AntiVirus
Riskware.Win32.NetFilter.dobhai
0.30.10.952

Norman
Adware.BrowseFox.V
03.12.2014 13:20:04

nProtect
Adware.BrowseFox.V
15.04.07.01

Qihoo 360 Security
Win32/Virus.Adware.618
1.0.0.1015

Reason Heuristics
PUP.Yontoo
15.4.8.14

Vba32 AntiVirus
AdWare.Zaitu
3.12.26.3

VIPRE Antivirus
Threat.4150696
38882

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2131

File size:
42.1 KB (43,152 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}gw.sys

Digital Signature
Signed by:
Mountain Bike

Authority:
VeriSign, Inc.

Valid from:
1/10/2015 7:00:00 PM

Valid to:
1/11/2016 6:59:59 PM

Subject:
CN=Mountain Bike, O=Mountain Bike, L=San Diego, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
25B97080EDAA57F7AD57607CEEA9C13E

File PE Metadata
Compilation timestamp:
4/8/2015 2:42:08 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:eN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddFgK:ihUcpH/0+LCf7EziDHhdt

Entry address:
0xA03E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 20, 70, FF, FF, CC, CC, 94, A1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, CE, A4, 00, 00, E0, 80, 00, 00, B4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 24, A5, 00, 00, 00, 80, 00, 00, EC, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A4, A9, 00, 00, 38, 80, 00, 00, C4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9C, AA, 00, 00, 10, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, FC, A4, 00, 00, 10, A5, 00, 00, E8, A4...
 
[+]

Entropy:
6.6156

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}Gw

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


Remove {4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}gw.sys - Powered by Reason Core Security
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