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{b8a90375-3b37-4954-86de-f96c458c4ce2}gw64.sys

Fortunitas

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {b8a90375-3b37-4954-86de-f96c458c4ce2}gw64.sys by Fortunitas has been detected as adware by 24 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{b8a90375-3b37-4954-86de-f96c458c4ce2}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 Fortunitas)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
b3577fbd4a7b7c8ebaeb962e78669df4

SHA-1:
87baf8360c999fb470721d40fd48a4e2e5adb213

SHA-256:
ba1d80275ccf8b6e428792dfe401a6ca514461dc5e88a4f70eadc02795cec8cb

Scanner detections:
24 / 68

Status:
Adware

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

Analysis date:
4/19/2024 1:13:55 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
355

Agnitum Outpost
Riskware.Agent
7.1.1

AhnLab V3 Security
Trojan/Win64.SwiftBrowse
2014.09.13

AVG
Fortu
2017.0.2833

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.16215

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.230

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

Dr.Web
Trojan.BPlug.123
9.0.1.046

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
8.16.02.15.09

ESET NOD32
Win64/BrowseFox.CG (variant)
10.10766

Fortinet FortiGate
Adware/BrowseFox
2/15/2016

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

F-Secure
Adware.SwiftBrowse.CH
11.2016-15-02_2

G Data
Adware.SwiftBrowse.CH
16.2.24

IKARUS anti.virus
AdWare.SpadeCast
t3scan.1.6.1.0

McAfee
Artemis!2D8BE8643FAC
5600.6489

MicroWorld eScan
Adware.SwiftBrowse.CH
17.0.0.138

nProtect
Adware.SwiftBrowse.CH
14.11.21.01

Reason Heuristics
PUP.Yontoo.Fortunitas (M)
16.2.15.9

Rising Antivirus
PE:Trojan.Win32.Generic.17A8CFB0!396939184
23.00.65.16213

Sophos
BrowseSmart
4.98

Trend Micro House Call
Suspicious_GEN.F47V0708
7.2.46

VIPRE Antivirus
Trojan.Win32.Generic
35040

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.1991

File size:
43.7 KB (44,736 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{b8a90375-3b37-4954-86de-f96c458c4ce2}gw64.sys

Digital Signature
Signed by:
Fortunitas

Authority:
VeriSign, Inc.

Valid from:
11/27/2013 1:00:00 AM

Valid to:
11/28/2014 12:59:59 AM

Subject:
CN=Fortunitas, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Fortunitas, 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:
2F2F8BE6BBAEA40C49A9E24B7BE035FB

File PE Metadata
Compilation timestamp:
9/13/2014 1:33:02 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:sgLmaZF8aSQ7DwZmEhzg8ClFHeDrTdRfsQCa5075YLwidHoT98:f5ZEQI8E7ClquaC759E8O

Entry address:
0xB064

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, C6, 60, FF, FF, CC, CC, 38, B2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, B6, 00, 00, 60, 81, 00, 00, 28, B1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, B9, 00, 00, 50, 80, 00, 00, D8, B0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, BA, 00, 00, 00, 80, 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, 9A, BA, 00, 00, 00, 00, 00, 00, 86, BA, 00, 00...
 
[+]

Code size:
30.5 KB (31,232 bytes)

Driver
Display name:
{b8a90375-3b37-4954-86de-f96c458c4ce2}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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