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{9390ab08-5703-448b-94f8-b8b1934c8841}w.sys

ClearThink

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {9390ab08-5703-448b-94f8-b8b1934c8841}w.sys by ClearThink has been detected as adware by 22 anti-malware scanners. It runs as a Windows kernel mode device driver named “{9390ab08-5703-448b-94f8-b8b1934c8841}w”. 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 ClearThink)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
945fdc15b0a901690064b1ff952caa0f

SHA-1:
363657efbb591e5c08a103e8fc96df9f7ab02737

SHA-256:
bbedb358cdc34e6914c554ce63caf5cf87de764a1632176fff4e2ae44a7c8e2a

Scanner detections:
22 / 68

Status:
Adware

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

Analysis date:
5/4/2024 10:14:46 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
813

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.185.104

AVG
Generic
2015.0.3291

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141113

Bitdefender
Adware.BrowseFox.V
1.0.20.1585

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/21411

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20071

Dr.Web
hacktool program Tool.NetFilter.313
9.0.1.05190

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.14.11.13.05

ESET NOD32
Win32/RiskWare.NetFilter (variant)
8.10720

F-Prot
W32/A-76f53fd6
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2014-13-11_5

G Data
Adware.BrowseFox
14.11.24

MicroWorld eScan
Adware.BrowseFox.V
15.0.0.951

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.28.6.63362

nProtect
Adware.BrowseFox.V
14.11.13.01

Qihoo 360 Security
Win32/Virus.Adware.618
1.0.0.1015

Reason Heuristics
PUP.ClearThink.k
14.11.13.16

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
34232

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.1982

File size:
42.1 KB (43,152 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{9390ab08-5703-448b-94f8-b8b1934c8841}w.sys

Digital Signature
Signed by:
ClearThink

Authority:
VeriSign, Inc.

Valid from:
10/8/2014 7:00:00 PM

Valid to:
8/5/2015 6:59:59 PM

Subject:
CN=ClearThink, O=ClearThink, 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:
59B72B1DB71CE323997B1EAF80E12AAE

File PE Metadata
Compilation timestamp:
9/22/2014 2:01:51 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:CN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddTP:WhUcpH/0+LCf7EziDHhdN

Entry address:
0xA03E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 20, 70, FF, FF, CC, CC, 94, A1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, CE, A4, 00, 00, E0, 80, 00, 00, B4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 24, A5, 00, 00, 00, 80, 00, 00, EC, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A4, A9, 00, 00, 38, 80, 00, 00, C4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9C, AA, 00, 00, 10, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, FC, A4, 00, 00, 10, A5, 00, 00, E8, A4...
 
[+]

Entropy:
6.6145

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{9390ab08-5703-448b-94f8-b8b1934c8841}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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