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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 8 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. 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)

MD5:
2378fd3ac44638a5d9ef4bcaed56d906

SHA-1:
0b07fc473f8439bc8ad8bec50d225cc3e70328b9

SHA-256:
c8f132f8b2491cffda7ff3b353debf5fbf0769afc61a0d69a887e322e840a9dc

Scanner detections:
8 / 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:
4/19/2024 8:47:51 PM UTC  (today)

Scan engine
Detection
Engine version

AVG
Generic
2015.0.3342

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14923

Dr.Web
Trojan.BPlug.181
9.0.1.0266

ESET NOD32
Win32/BrowseFox
8.10444

McAfee
Artemis!2378FD3AC446
5600.6998

Reason Heuristics
Adware.Yontoo.ClearThink.T
14.9.23.15

Sophos
Browse Fox
4.98

VIPRE Antivirus
Yontoo
33278

File size:
253.5 KB (259,592 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 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:
1200063ED04B1DA36F7FE204B3DD8617

File PE Metadata
Compilation timestamp:
12/5/2009 4:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:KZ+11dNg499jyy/1RWBT50YvmY2wZm/G/HcpR:DL9+s1s151mHp/G/8f

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:
7.8649

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 program.

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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