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utilclearthink.exe

ClearThink

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application utilclearthink.exe by ClearThink has been detected as adware by 9 anti-malware scanners. It runs as a separate (within the context of its own process) windows Service named “Update ClearThink”. This file is typically installed with the program ClearThink by Yontoo Technology, Inc. which is a potentially unwanted software program. 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:
ClearThink  (signed and verified)

Version:
1.0.5354.11443

MD5:
d1802b6e5f3208802d46f11ca8240291

SHA-1:
6f78037a589db6277cf3ad5b733511e9e6f11c2b

SHA-256:
149cc2dc15ad7f587ed529436e53ba5d77d3974e1ddcb8458cb792896fb2e2bc

Scanner detections:
9 / 68

Status:
Adware

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

Analysis date:
4/20/2024 10:21:27 AM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
APPL/BrowseFox.Gen
7.11.169.242

AVG
Generic
2015.0.3367

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14829

ESET NOD32
Win32/BrowseFox (variant)
8.10336

IKARUS anti.virus
PUA.BrowseFox
t3scan.1.7.5.0

Kaspersky
not-a-virus:HEUR:AdWare.MSIL.Kranet
14.0.0.3332

Malwarebytes
PUP.Optional.ClearThink.A
v2014.08.29.01

Qihoo 360 Security
Win32/Virus.Adware.e4c
1.0.0.1015

Reason Heuristics
PUP.ClearThink.O
14.8.29.13

File size:
315.7 KB (323,312 bytes)

Product version:
1.0.5354.11443

Original file name:
ClearThink.exe

File type:
Executable application (Win32 EXE)

Common path:
C:\Program Files\clearthink\bin\utilclearthink.exe

Digital Signature
Signed by:
ClearThink

Authority:
VeriSign, Inc.

Valid from:
8/5/2014 4:00:00 AM

Valid to:
8/6/2015 3:59:59 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:
8/29/2014 11:21:42 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
8.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
6144:dJvfAzKz5Hy70itI7N1Kd7ppkfxypL87zf92WosPhnJM7Znw6DXbhQOKUjTSeE:dJvfH9PCLPwY1QVUQ

Entry address:
0x4EBC6

Entry point:
FF, 25, 00, 20, 40, 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, 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, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 02, 00, 10, 00, 00, 00, 20, 00, 00, 80, 18, 00, 00, 00, E0, 02, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 01, 00, 00, 00, 38, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00...
 
[+]

Developed / compiled with:
Microsoft Visual C# / Basic .NET

Code size:
307 KB (314,368 bytes)

Service
Display name:
Update ClearThink

Type:
Win32OwnProcess


The file utilclearthink.exe has been discovered within the following programs.

Buzzdock  by Alactro LLC
This is a web browser extension that injects advertising. From the EULA: "Buzzdock is free to download and use. Buzzdock is supported by advertising, and users will see additional ads on websites where Buzzdock features operate.
www.buzzdock.com/faq-support
79% remove it
ClearThink  by Yontoo Technology, Inc.
ClearThink is an advertising supported (adware) extension that runs in the context of the user's web browser as well as a process in the background.
useclearthink.com/support
83% remove it
 
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The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to a88-221-112-145.deploy.akamaitechnologies.com  (88.221.112.145:80)

TCP (HTTP):
Connects to a23-200-86-143.deploy.static.akamaitechnologies.com  (23.200.86.143:80)

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