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WebShieldService.exe

Web Shield

Irrational Number Applications

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application WebShieldService.exe, “WebShield Service” 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. It runs as a separate (within the context of its own process) windows Service named “WebShield”.
Publisher:
Irrational Number Applications  (signed and verified)

Product:
Web Shield

Description:
WebShield Service

Version:
1.0.0.0

MD5:
04c466f71752e46e90125caaf1864ef6

SHA-1:
317a1b9d1a2e080eddd702e1ecb63422e2976b8e

SHA-256:
5dfebd0138e0c7d9f9c151130de30eda1743121b050b17cb455ef8fa9252390f

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:
12/25/2024 5:27:10 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.8.10.18

File size:
2.2 MB (2,318,720 bytes)

Product version:
1.0.0.0

Copyright:
Copyright © Irrational Number Applications 2014

Original file name:
WebShieldService.exe

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\ProgramData\webshield\webshieldservice.exe

Digital Signature
Signed by:
Irrational Number Applications

Authority:
VeriSign, Inc.

Valid from:
2/25/2014 4:00:00 PM

Valid to:
2/26/2015 3:59:59 PM

Subject:
CN=Irrational Number Applications, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Irrational Number Applications, L=St. James, S=St. James, C=BB

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:
68A3A4FCF1FE292BB14A5717D3754944

File PE Metadata
Compilation timestamp:
10/14/2014 11:44:43 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
49152:lIW1ke6OVwsEkEuzZHJkduuvIyhYeJ4zqsoNHBmdutx:lIW1keNVhEkJtu5hYeJ4Nm

Entry address:
0x235BDE

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, 02, 00, 10, 00, 00, 00, 20, 00, 00, 80, 18, 00, 00, 00, 38, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 01, 00, 00, 00, 50, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 01, 00, 00, 00, 68, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00...
 
[+]

Entropy:
7.9994

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

Code size:
2.2 MB (2,309,120 bytes)

Service
Display name:
WebShield

Type:
Win32OwnProcess

Depends on:
Winmgmt CryptSvc


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