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yontooclientsetup.exe

Yontoo Layers Client

Yontoo Technology, Inc.

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application yontooclientsetup.exe by Yontoo Technology has been detected as adware by 9 anti-malware scanners. This is a setup and installation application and has been known to bundle potentially unwanted software. The file has been seen being downloaded from download.yontoo.com.
Publisher:
Yontoo Technology, Inc.  (signed and verified)

Product:
Yontoo Layers Client

Description:
Installer

Version:
2010.12.1.1306

MD5:
d3c1ab47797d24a8db1ce94fd23f0013

SHA-1:
7f759c76b80339f63f659f8f70e1348f1caa2767

SHA-256:
92d6b1082e7fd65363d140a3c8912fd2092d316ff4319893351d7c35e80f5f37

Scanner detections:
9 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/18/2025 9:34:31 PM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/Yontoo.Gen
7.11.105.46

Dr.Web
Adware.Plugin.11
9.0.1.0120

ESET NOD32
Win32/Adware.Yontoo
8.8857

IKARUS anti.virus
AdWare.Yontoo
t3scan.2.0.127

Norman
Agent.VBAZ.dropper
11.20140430

Reason Heuristics
PUP.Installer.YontooTechnology.V
14.7.3.9

Rising Antivirus
Trojan.InstallRex!562A
23.00.65.14428

Trend Micro House Call
TROJ_GEN.R0CBH01GT13
7.2.120

VIPRE Antivirus
Yontoo
21960

File size:
588.3 KB (602,464 bytes)

Product version:
1.10.01

Copyright:
Copyright (c) 2010 Yontoo Technology, Inc.. All rights reserved

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Digital Signature
Signed by:
Yontoo Technology, Inc.

Authority:
GoDaddy.com, Inc.

Valid from:
9/2/2009 1:41:20 PM

Valid to:
9/2/2012 1:41:20 PM

Subject:
CN="Yontoo Technology, Inc.", OU=Product Development, O="Yontoo Technology, Inc.", L=Carlsbad, S=CA, C=US

Issuer:
SERIALNUMBER=07969287, CN=Go Daddy Secure Certification Authority, OU=http://certificates.godaddy.com/repository, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US

Serial number:
6A08909DDA7B

File PE Metadata
Compilation timestamp:
8/19/2010 7:08:13 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
12288:PI2wxBhTqGReRq543HT3iEMCg5DmnB6jtlAvhlF01dgJ:cxnTq37iAZwjvAjF01w

Entry address:
0x1627

Entry point:
55, 8B, EC, 81, EC, 58, 0B, 00, 00, 53, 56, 33, DB, 57, 66, 89, 9D, A8, F4, FF, FF, 89, 5D, FC, FF, 15, 74, 30, 40, 00, A3, 00, 40, 40, 00, FF, 15, 70, 30, 40, 00, 89, 45, F8, 8D, 85, B8, FC, FF, FF, 50, C7, 85, B8, FC, FF, FF, 14, 01, 00, 00, FF, 15, 6C, 30, 40, 00, 85, C0, 75, 21, FF, 15, 14, 30, 40, 00, 50, 68, 30, 34, 40, 00, E8, 40, FA, FF, FF, 59, C7, 05, 04, 40, 40, 00, FF, 00, 00, 00, E9, C5, 01, 00, 00, 68, 1C, 34, 40, 00, 68, 0C, 34, 40, 00, FF, 15, 68, 30, 40, 00, 50, FF, 15, 64, 30, 40, 00, 3B...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

The file yontooclientsetup.exe has been seen being distributed by the following URL.

http://download.yontoo.com/YontooClientSetup.exe

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