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{3f538614-b636-4023-9ec2-564ada4b07b3}gw64.sys

HulaToo

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {3f538614-b636-4023-9ec2-564ada4b07b3}gw64.sys by HulaToo 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 “{3f538614-b636-4023-9ec2-564ada4b07b3}Gw64”.
Publisher:
StdLib  (signed by HulaToo)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
72fe395d5625ab04deef1e419224c5b6

SHA-1:
6a572892dab91e2461bf2c8ef6fa5e7cfe9c7c1b

SHA-256:
baeb65ea75719482141b2957338629486a71795e263e0246d70a2a10df2eb365

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:
4/18/2024 5:28:33 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.14.6

File size:
43.7 KB (44,728 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\{3f538614-b636-4023-9ec2-564ada4b07b3}gw64.sys

Digital Signature
Signed by:
HulaToo

Authority:
VeriSign, Inc.

Valid from:
3/19/2014 8:00:00 AM

Valid to:
3/20/2015 7:59:59 AM

Subject:
CN=HulaToo, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=HulaToo, 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:
089F9EDFF3BE5DAC5EE5E228073DBDC4

File PE Metadata
Compilation timestamp:
9/13/2014 7:33:02 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

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...
 
[+]

Entropy:
6.3748

Code size:
30.5 KB (31,232 bytes)

Driver
Display name:
{3f538614-b636-4023-9ec2-564ada4b07b3}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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