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{bcd08fc8-cb56-41a3-8b19-3c556687a504}w.sys

ClearThink

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {bcd08fc8-cb56-41a3-8b19-3c556687a504}w.sys by ClearThink has been detected as adware by 33 anti-malware scanners. It runs as a Windows kernel mode device driver named “{bcd08fc8-cb56-41a3-8b19-3c556687a504}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:
60a396e310dcc16d639332e7f443e78f

SHA-1:
03ee91063807f0e459d7f0e52be270e0dc9afbdc

SHA-256:
676ebb9908f44ea6e053af8b57aeb2e6ebf5248f0d428a98ad4ad31c8d954c82

Scanner detections:
33 / 68

Status:
Adware

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

Analysis date:
4/26/2024 3:44:10 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
354

Agnitum Outpost
PUA.BrowseFox
7.1.1

AhnLab V3 Security
Win-PUP/BrowseFox.Gen
2015.03.13

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.216.120

avast!
Win32:BrowseFox-ET [PUP]
2014.9-160215

AVG
Generic
2017.0.2832

Baidu Antivirus
PUA.Win32.NetFilter
4.0.3.16215

Bitdefender
Adware.BrowseFox.V
1.0.20.230

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/21511

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
21386

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.16.02.15.07

ESET NOD32
Win32/RiskWare.NetFilter (variant)
10.10821

F-Prot
W32/S-a7161e1c
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2016-15-02_2

G Data
Adware.BrowseFox
16.2.25

K7 AntiVirus
Unwanted-Program
13.200.15246

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.656

McAfee
Artemis!DF24A0E66C42
5600.6488

MicroWorld eScan
Adware.BrowseFox.V
17.0.0.138

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.30.0.64448

Norman
Adware.BrowseFox.V
11.20160215

nProtect
Adware.BrowseFox.V
15.03.12.01

Panda Antivirus
Trj/Chgt.M
16.02.15.07

Qihoo 360 Security
Win32/Virus.Adware.618
1.0.0.1015

Reason Heuristics
PUP.Yontoo.ClearThink (M)
16.2.15.19

Rising Antivirus
PE:Trojan.Win32.Generic.17C88C17!399019031
23.00.65.16213

Sophos
Generic PUA PC
4.98

Trend Micro House Call
TROJ_GEN.R047C0EA515
7.2.46

Trend Micro
TROJ_GEN.R047C0EA515
10.465.15

Vba32 AntiVirus
AdWare.Zaitu
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
38362

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2095

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\{bcd08fc8-cb56-41a3-8b19-3c556687a504}w.sys

Digital Signature
Signed by:
ClearThink

Authority:
VeriSign, Inc.

Valid from:
10/8/2014 9:00:00 PM

Valid to:
8/5/2015 8:59:59 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:
12/8/2014 3:39:19 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:7N0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddzHi4H:BhUcpH/0+LCf7EziDHhdB3H

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...
 
[+]

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{bcd08fc8-cb56-41a3-8b19-3c556687a504}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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