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{29b136c9-938d-4d3d-8df8-d649d9b74d02}gt64.sys

Mega Browse

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {29b136c9-938d-4d3d-8df8-d649d9b74d02}gt64.sys by Mega Browse has been detected as adware by 9 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{29b136c9-938d-4d3d-8df8-d649d9b74d02}Gt64”.
Publisher:
StdLib  (signed by Mega Browse)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
8c1da818c9bbea664a8631c67b79c7ed

SHA-1:
bf497b25a1d46c49e1988c6c5ad989474e52ea81

SHA-256:
854f9390895d5e0318ee9f3ee33d12aa2c41b7f3d80e316dda00cdfbd3287703

Scanner detections:
9 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/25/2024 6:59:36 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.Agent.OBN
452

Agnitum Outpost
PUA.Agent
7.1.1

Bitdefender
Adware.Agent.OBN
1.0.20.1565

Emsisoft Anti-Malware
Adware.Agent.OBN
8.15.11.09.11

F-Secure
Adware.Agent.OBN
11.2015-09-11_2

G Data
Adware.Agent.OBN
15.11.24

MicroWorld eScan
Adware.Agent.OBN
16.0.0.939

Reason Heuristics
PUP.Yontoo.MegaBrowse (M)
15.11.9.23

VIPRE Antivirus
Adware.Agent
29704

File size:
58.7 KB (60,096 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\{29b136c9-938d-4d3d-8df8-d649d9b74d02}gt64.sys

Digital Signature
Signed by:
Mega Browse

Authority:
VeriSign, Inc.

Valid from:
1/21/2014 4:00:00 PM

Valid to:
1/22/2015 3:59:59 PM

Subject:
CN=Mega Browse, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Mega Browse, 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:
151F3F44EFA5ADB264205FBF9F779B3D

File PE Metadata
Compilation timestamp:
1/30/2014 4:46:41 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
1536:GA0Ep72J9xc1JUzUPU/qnIy4fNwQKZzrtW+DGK:H0G72J8YvqIy4fNwQKNrtNDGK

Entry address:
0x10064

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, 8E, B3, FF, FF, CC, CC, D0, 00, 01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 40, 05, 01, 00, 10, C0, 00, 00, C0, 00, 01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 62, 05, 01, 00, 00, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 4E, 05, 01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 3C, 02, 01, 00, 00, 00, 00, 00, 50, 02, 01, 00, 00, 00, 00, 00, 6E, 02, 01, 00...
 
[+]

Entropy:
6.4023

Code size:
45 KB (46,080 bytes)

Driver
Display name:
{29b136c9-938d-4d3d-8df8-d649d9b74d02}Gt64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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