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{e8294a7e-8442-4f3a-8722-cb5c3f67ed67}gw64.sys

BrowseStudio

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {e8294a7e-8442-4f3a-8722-cb5c3f67ed67}gw64.sys by BrowseStudio has been detected as adware by 22 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{e8294a7e-8442-4f3a-8722-cb5c3f67ed67}Gw64”. 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 BrowseStudio)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
7b661b190cd1e5867161de15d9d08610

SHA-1:
8de3527668fec756b7df5e3cc22b65275ee66cd6

SHA-256:
877160c0ada8b93cbdb68a7c6e059ab6a293cffddc93931f796fb164df1c8b20

Scanner detections:
22 / 68

Status:
Adware

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

Analysis date:
4/16/2024 9:57:16 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
805

Agnitum Outpost
Riskware.Agent
7.1.1

Avira AntiVirus
Adware/BrowseFox.aol
7.11.188.4

AVG
Generic
2015.0.3283

Baidu Antivirus
Adware.Win64.BrowseFox
4.0.3.141121

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.1625

Clam AntiVirus
Win.Adware.Swiftbrowse-497
0.98/21511

Dr.Web
Tool.NetFilter.313
9.0.1.0325

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
8.14.11.21.09

ESET NOD32
Win64/BrowseFox.CG (variant)
8.10759

Fortinet FortiGate
Adware/BrowseFox
11/21/2014

F-Prot
W64/A-59c9c70a
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CH
11.2014-21-11_6

G Data
Adware.SwiftBrowse.CH
14.11.24

McAfee
Artemis!7B661B190CD1
5600.6939

MicroWorld eScan
Adware.SwiftBrowse.CH
15.0.0.975

nProtect
Adware.SwiftBrowse.CH
14.11.21.01

Panda Antivirus
Trj/Chgt.L
14.11.21.09

Reason Heuristics
PUP.BrowseStudio.n
14.11.21.23

Trend Micro House Call
Suspicious_GEN.F47V1120
7.2.325

VIPRE Antivirus
Trojan.Win32.Generic
34988

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.1989

File size:
47.6 KB (48,784 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{e8294a7e-8442-4f3a-8722-cb5c3f67ed67}gw64.sys

Digital Signature
Signed by:
BrowseStudio

Authority:
VeriSign, Inc.

Valid from:
9/1/2014 8:00:00 PM

Valid to:
9/2/2015 7:59:59 PM

Subject:
CN=BrowseStudio, O=BrowseStudio, 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:
11AE532A33120159E1078A0D3EDE88C9

File PE Metadata
Compilation timestamp:
11/20/2014 3:37:28 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lg7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3Ii:qFID6EGnLA8AFJTNEVmDh

Entry address:
0xC064

Entry point:
48, 83, EC, 28, 4C, 8B, C2, 4C, 8B, C9, E8, 95, FF, FF, FF, 49, 8B, D0, 49, 8B, C9, 48, 83, C4, 28, E9, E2, 50, FF, FF, CC, CC, 78, C2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 54, C6, 00, 00, A0, 91, 00, 00, 28, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DA, CA, 00, 00, 50, 90, 00, 00, D8, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, D2, CB, 00, 00, 00, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, CB, 00, 00, 00, 00, 00, 00, A2, CB, 00, 00...
 
[+]

Entropy:
6.3925

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{e8294a7e-8442-4f3a-8722-cb5c3f67ed67}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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