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WebShieldInstall.exe

Web Shield

Irrational Number Applications

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application WebShieldInstall.exe, “WebShield Install” by Irrational Number Applications 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. It is also typically executed from the user's temporary directory.
Publisher:
Irrational Number Applications  (signed and verified)

Product:
Web Shield

Description:
WebShield Install

Version:
1.0.0.0

MD5:
d9f1c3f9437975eb96092e2b4767916e

SHA-1:
21cba4a1dac8c362dec79f06212867ad1056cb26

SHA-256:
9a07a4c2d05e759ee18e0a924d72f310f634fb9c7a4943c559f7e37d57517791

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:
5/7/2024 9:58:51 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.14.0

File size:
2.7 MB (2,846,200 bytes)

Product version:
1.0.0.0

Copyright:
Copyright © Irrational Number Applications 2015

Original file name:
WebShieldInstall.exe

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\webshieldinstall.exe

Digital Signature
Signed by:
Irrational Number Applications

Authority:
Symantec Corporation

Valid from:
1/19/2015 10:00:00 PM

Valid to:
3/20/2016 8:59:59 PM

Subject:
CN=Irrational Number Applications, O=Irrational Number Applications, L=St. James, S=St. James, C=BB

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
637F0A74512CF65B05B3A5A0241D6624

File PE Metadata
Compilation timestamp:
6/9/2015 10:56:07 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

.NET CLR dependent:
Yes

Entry address:
0x2B684E

Entry point:
FF, 25, 00, 20, 40, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00...
 
[+]

Developed / compiled with:
Microsoft Visual C# / Basic .NET

Code size:
2.7 MB (2,836,992 bytes)

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