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{4bd643ce-8ef9-41bb-9b43-501b4f8fae85}gw.sys

Girafarri

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {4bd643ce-8ef9-41bb-9b43-501b4f8fae85}gw.sys by Girafarri has been detected as adware by 31 anti-malware scanners. It runs as a Windows kernel mode device driver named “{4bd643ce-8ef9-41bb-9b43-501b4f8fae85}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 Girafarri)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
f9ca75e2b5993010ebba8d4b95679a93

SHA-1:
706efa2cc9c3aeea6998600f8bb7b6ca8b6c9dd3

SHA-256:
45c3ed9ee186c7a10134e7b0eb4051594365ae735b1bdc152078f9c3a381edaf

Scanner detections:
31 / 68

Status:
Adware

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

Analysis date:
4/24/2024 7:49:04 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
6324531

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
ADWARE/BrowseFox.A.1227
3.6.1.96

avast!
Win32:BrowseFox-GZ [PUP]
150320-0

AVG
Girafarri
2016.0.3156

Bitdefender
Adware.BrowseFox.V
1.0.20.435

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/21511

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
21573

Dr.Web
Trojan.Yontoo.1734
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

Fortinet FortiGate
Riskware/NetFilter
3/28/2015

F-Prot
W32/A-76f53fd6
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
5.13.68

G Data
Adware.BrowseFox
15.3.25

herdProtect (fuzzy)
variant of {be5bf058-a067-4076-8c2e-22b9345a0260}gw.sys (Adware)
2015.7.3.6

K7 AntiVirus
Unwanted-Program
13.202.15414

Malwarebytes
PUP.Optional.Girafarri
v2015.03.28.06

McAfee
Trojan.Artemis!F9CA75E2B599
16.8.708.2

MicroWorld eScan
Adware.BrowseFox.V
16.0.0.261

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

nProtect
Adware.BrowseFox.V
15.03.27.01

Qihoo 360 Security
Win32/Virus.Adware.618
1.0.0.1015

Reason Heuristics
PUP.Yontoo
15.3.28.18

Sophos
Generic PUA HA
4.98

Trend Micro House Call
TROJ_GEN.F0C2C00C415
7.2.87

Trend Micro
TROJ_GEN.F0C2C00C415
10.465.28

Vba32 AntiVirus
AdWare.Zaitu
3.12.26.3

VIPRE Antivirus
Threat.4150696
38552

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2119

File size:
42.2 KB (43,200 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\{4bd643ce-8ef9-41bb-9b43-501b4f8fae85}gw.sys

Digital Signature
Signed by:
Girafarri

Authority:
VeriSign, Inc.

Valid from:
4/21/2014 7:00:00 PM

Valid to:
4/22/2015 6:59:59 PM

Subject:
CN=Girafarri, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Girafarri, L=Santa Monica, 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:
2FB197284297D52000599AA2F7D0668F

File PE Metadata
Compilation timestamp:
2/12/2015 12:32:08 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:yN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddAxl4:mhUcpH/0+LCf7EziDHhdq4

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:
6.6141

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{4bd643ce-8ef9-41bb-9b43-501b4f8fae85}Gw

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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