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clearthinkuninstall.exe

ClearThink

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application clearthinkuninstall.exe by ClearThink has been detected as adware by 4 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. Additionally, the file is typically installed by a number of programs including ClearThink by Yontoo Technology, Inc. and Buzzdock by Alactro LLC, both potentially unwanted software. 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)

MD5:
4b4f4eb9c05c269c9316a8305544e014

SHA-1:
fe43155fa0ab920a2b0097fcce318da048a0a785

SHA-256:
33e19fa8abf18bdae57b874b3af4935d6056e557c8ed6c4836d11cdb665ab40f

Scanner detections:
4 / 68

Status:
Adware

Explanation:
This is the installer/uninstaller for the Yontoo branded (clearthink) adware program. The main protgram is desigend to deliver advertisements to the user's web browser through injection.

Analysis date:
4/26/2024 9:08:12 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
Generic
2015.0.3367

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14829

ESET NOD32
Win32/BrowseFox
8.10331

Reason Heuristics
Adware.Yontoo.ClearThink.T
14.8.29.14

File size:
253.5 KB (259,584 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Program Files\clearthink\clearthinkuninstall.exe

Digital Signature
Signed by:
ClearThink

Authority:
VeriSign, Inc.

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

Valid to:
8/5/2015 4:59:59 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:
1200063ED04B1DA36F7FE204B3DD8617

File PE Metadata
Compilation timestamp:
12/5/2009 3:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:RZ+11dcZx1y/1RWBT5RQIeB+woN8wZm/G/Hcpk:W6x1s1s15JOm8p/G/8+

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.8650

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file clearthinkuninstall.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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