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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 1 anti-malware scanner with very strong indications that the file is a potential threat. This is a setup and installation application and has been known to bundle potentially unwanted software. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Yontoo Technology, Inc.  (signed and verified)

Product:
Yontoo Layers Client

Description:
Installer

Version:
2009.10.13.1602

MD5:
01e30ec1185e4f06b027dfea935fa7f5

SHA-1:
bc81ea12f1b92fb9ac68874e788fb60e4ddc9fac

SHA-256:
d0d7ff239ff350e1a18afe57aa77e101b8ce2a1370d6ed98ee20778a65bb5c70

Scanner detections:
1 / 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:
4/25/2024 6:08:12 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.12.8.1

File size:
536.7 KB (549,624 bytes)

Product version:
1.10.01

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

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\yontooclientsetup.exe

Digital Signature
Signed by:
Yontoo Technology, Inc.

Authority:
GoDaddy.com, Inc.

Valid from:
9/2/2009 8:41:20 PM

Valid to:
9/2/2012 8:41:20 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:
9/11/2009 3:11:05 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

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...
 
[+]

Entropy:
7.9861

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 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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