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{d96d43c4-16c2-4eef-a381-9a25d36535a8}gw64.sys

focusbase

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {d96d43c4-16c2-4eef-a381-9a25d36535a8}gw64.sys by focusbase has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a Windows 64-bit kernel mode device driver named “{d96d43c4-16c2-4eef-a381-9a25d36535a8}Gw64”.
Publisher:
StdLib  (signed by focusbase)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
4a0333c51704a105f87d49a58dec3318

SHA-1:
651148fd7630acab8e5c4b2d97fd8e255b499b01

SHA-256:
73dec7e2f1841188bda2b089ac018a363118f4ab45e8561fff5092c9895dabc9

Scanner detections:
1 / 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:
6/17/2025 6:37:41 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.15.23

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\{d96d43c4-16c2-4eef-a381-9a25d36535a8}gw64.sys

Digital Signature
Signed by:
focusbase

Authority:
VeriSign, Inc.

Valid from:
4/23/2015 3:00:00 AM

Valid to:
6/22/2016 2:59:59 AM

Subject:
CN=focusbase, O=focusbase, 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:
4D86370C8A7B120E83853D816EE5538B

File PE Metadata
Compilation timestamp:
6/6/2016 8:31:58 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

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:
6.3929

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{d96d43c4-16c2-4eef-a381-9a25d36535a8}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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