» clearthink_setup.exe
Overview
Analysis
File Details
Network (3)

clearthink_setup.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 clearthink_setup.exe by ClearThink has been detected as adware by 25 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. 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. It is also typically executed from the user's temporary directory. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.

File name:

Publisher:

ClearThink (signed and verified)

MD5:

051a1e6c74174e25dbc89d3e456310ff

SHA-1:

0a21bc9d86b0fd31adc83a8b0335c7777166eca9

SHA-256:

0aecd064d9f9c32e5ab5ff111973d97eeb10fcd1cb7996e2a7a9d7abc1c43faa

Scanner detections:

25 / 68

Status:

Adware

Explanation:

Injects advertising in the web browser in various formats.

Analysis date:

4/26/2024 2:05:57 PM UTC (today)

Scan engine

Detection

Engine version

Lavasoft Ad-Aware

Gen:Variant.Adware.SwiftBrowse.1

885

Agnitum Outpost

Riskware.Agent

7.1.1

Avira AntiVirus

APPL/BrowseFox.Gen

7.11.170.152

AVG

Could be an adware BrowseFox

2014.0.4015

Baidu Antivirus

Adware.Win32.BrowseFox

4.0.3.1492

Bitdefender

Gen:Variant.Adware.SwiftBrowse.1

1.0.20.1225

Dr.Web

infected with Trojan.BPlug.108

9.0.1.05190

Emsisoft Anti-Malware

Gen:Variant.Adware.SwiftBrowse

9.0.0.4324

ESET NOD32

Win32/BrowseFox.C potentially unwanted application

7.0.302.0

Fortinet FortiGate

Riskware/BrowseFox

9/2/2014

F-Secure

Gen:Variant.Adware.SwiftBrowse.1

11.2014-02-09_3

IKARUS anti.virus

PUA.BrowseFox

t3scan.1.7.5.0

K7 AntiVirus

Trojan

13.183.13247

Kaspersky

not-a-virus:HEUR:AdWare.Win32.Kranet

15.0.0.494

Malwarebytes

PUP.Optional.ClearThink.A

v2014.09.02.10

McAfee

Artemis!C42B3FAC14A4

5600.7019

MicroWorld eScan

Gen:Variant.Adware.SwiftBrowse.1

15.0.0.735

NANO AntiVirus

Trojan.Win32.BPlug.dcnjjv

0.28.2.61942

Panda Antivirus

Trj/Chgt.E

14.09.02.10

Qihoo 360 Security

HEUR/Malware.QVM06.Gen

1.0.0.1015

Reason Heuristics

PUP.Installer.ClearThink.Q

14.9.2.22

Rising Antivirus

NS:PUF.SilenceInstaller!1.9DDF

23.00.65.14831

SUPERAntiSpyware

Adware.BrowseFox/Variant

10383

Trend Micro House Call

Suspici.A730BB3E

7.2.245

VIPRE Antivirus

Threat.4150696

32210

File size:

1.9 MB (2,042,776 bytes)

File type:

Executable application (Win32 EXE)

Installer:

NSIS (Nullsoft Scriptable Install System)

Common path:

C:\users\{user}\appdata\local\temp\{random}.tmp\clearthink_setup.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):

49152:FRKYP8Ka4QynwQz0gMMGnBCKVsAMMB+kWyMFosg6:FRiKa4QlQz0dnc4sQBpMFzg6

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... 
[+]

Packer / compiler:

Nullsoft install system v2.x

Code size:

22.5 KB (23,040 bytes)

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):

Connects to wac.edgecastcdn.net (72.21.81.13:80)

TCP (HTTP):

Connects to service.yontoo.com (8.25.35.148:80)

TCP (HTTP):

Connects to api.yontoo.com (8.25.35.15:80)

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