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{c5e48979-bd7f-4cf7-9b73-2482a67a4f37}w.sys

ClearThink

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {c5e48979-bd7f-4cf7-9b73-2482a67a4f37}w.sys by ClearThink has been detected as adware by 19 anti-malware scanners. It runs as a Windows kernel mode device driver named “{c5e48979-bd7f-4cf7-9b73-2482a67a4f37}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:
67e5fbc91238b61b513dbe4b69401633

SHA-1:
f0b0810f9e3f04bd57d2b53b952efd8b67d4e3b0

SHA-256:
06f7dd6f8e17ceff66ae246fb725f26fbdc4b26e0c6dfb3e93585f51f245855b

Scanner detections:
19 / 68

Status:
Adware

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

Analysis date:
4/26/2024 9:21:35 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Trojan.BPlug
7.1.1

AhnLab V3 Security
PUP/Win32.BrowseFox
2014.09.18

Avira AntiVirus
Adware/BrowseFox.A.168
7.11.172.144

AVG
Generic
2015.0.3335

Baidu Antivirus
Trojan.Win32.NetFilter
4.0.3.14930

Comodo Security
Application.Win32.RiskWare.NetFilter.D
19529

Dr.Web
Trojan.BPlug.123
9.0.1.0273

ESET NOD32
Win32/RiskWare.NetFilter (variant)
8.10437

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.7.5.0

K7 AntiVirus
Unwanted-Program
13.183.13504

McAfee
Artemis!217E89037C91
5600.6991

NANO AntiVirus
Riskware.Win32.Yotoon.ddghtt
0.28.2.61519

Qihoo 360 Security
Win32/Virus.Adware.c12
1.0.0.1015

Reason Heuristics
PUP.ClearThink.k
14.9.30.23

Sophos
Browse Fox
4.98

Trend Micro House Call
Suspicious_GEN.F47V0825
7.2.273

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Yontoo
32868

Zillya! Antivirus
Adware.Yotoon.Win64.7
2.0.0.1913

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\{c5e48979-bd7f-4cf7-9b73-2482a67a4f37}w.sys

Digital Signature
Signed by:
ClearThink

Authority:
VeriSign, Inc.

Valid from:
8/5/2014 5:30:00 AM

Valid to:
8/6/2015 5:29:59 AM

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:
1200063ED04B1DA36F7FE204B3DD8617

File PE Metadata
Compilation timestamp:
9/23/2014 12:31:51 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:XN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddTG:dhUcpH/0+LCf7EziDHhdE

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:
6.6138

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{c5e48979-bd7f-4cf7-9b73-2482a67a4f37}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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