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{59981518-8b2b-431e-90db-17dacc8cfa86}gw64.sys

Jotzey

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {59981518-8b2b-431e-90db-17dacc8cfa86}gw64.sys by Jotzey 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 “{59981518-8b2b-431e-90db-17dacc8cfa86}Gw64”.
Publisher:
StdLib  (signed by Jotzey)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
b6522886e71415c39dd5110caae2915a

SHA-1:
f75a962744e2b88ef302332a0be8ba6dac6887e3

SHA-256:
58f05888e9e9010d952b6bba87ea7c50da37e2642ce0e670b9447073cd940cef

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:
4/24/2024 9:07:27 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.16.9

File size:
60.2 KB (61,624 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\{59981518-8b2b-431e-90db-17dacc8cfa86}gw64.sys

Digital Signature
Signed by:
Jotzey

Authority:
VeriSign, Inc.

Valid from:
1/12/2014 1:00:00 AM

Valid to:
1/13/2015 12:59:59 AM

Subject:
CN=Jotzey, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Jotzey, 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:
4C7B335D1F24250859B4B5C0085A062C

File PE Metadata
Compilation timestamp:
7/30/2014 8:31:58 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xF064

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, 2E, 20, FF, FF, CC, CC, 38, F2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, F6, 00, 00, 60, C1, 00, 00, 28, F1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, F9, 00, 00, 50, C0, 00, 00, D8, F0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, FA, 00, 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, 00, 00, 00, 00, 9A, FA, 00, 00, 00, 00, 00, 00, 86, FA, 00, 00...
 
[+]

Entropy:
5.9334

Code size:
46.5 KB (47,616 bytes)

Driver
Display name:
{59981518-8b2b-431e-90db-17dacc8cfa86}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


herdProtect is a second line of defense malware removal platform powered by 68 anti-malware engines in the cloud. Since no single anti-malware program is perfect 100% of the time, herdProtect utilizes a 'herd' of multiple engines to guarantee the widest coverage and the earliest possible detection.