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KrabWeb.FirstRun.exe

FirstRun

Krab Web

The Yontoo branded FirstRun executable is distributed as part of a Yontoo product bundle and is desigend to install components of this ad-supported (injection) program as well as 'call home' to inform the server that the extension was installed and may request additional instructions. The application KrabWeb.FirstRun.exe by Krab Web has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
Krab Web  (signed and verified)

Product:
FirstRun

Version:
1.0.0.0

MD5:
62a497688ca65f8816a39d740a790208

SHA-1:
b4e67887aa64b26c2e3bc11a6c5f4ba9b2dd87bd

SHA-256:
b4d882519cb9de74ae4d3f3e144b14f03b2af56fa2ab5b119490cbea701a8bc4

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Part of the Yontoo ad injection web browser add-on.

Analysis date:
5/3/2024 1:45:18 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
Adware.Yontoo (M)
17.2.19.19

File size:
1.1 MB (1,123,616 bytes)

Product version:
1.0.0.0

Copyright:
Copyright © 2014

Original file name:
KrabWeb.FirstRun.exe

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\Program Files\krab web\krabweb.firstrun.exe

Digital Signature
Signed by:
Krab Web

Authority:
DigiCert Inc

Valid from:
6/8/2014 5:00:00 PM

Valid to:
6/17/2015 5:00:00 AM

Subject:
CN=Krab Web, O=Krab Web, L=Santa Monica, S=California, C=US

Issuer:
CN=DigiCert Assured ID Code Signing CA-1, OU=www.digicert.com, O=DigiCert Inc, C=US

Serial number:
0572744C4944FF55FB05A9A82A78D271

File PE Metadata
Compilation timestamp:
9/24/2014 5:26:32 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
8.0

.NET CLR dependent:
Yes

Entry address:
0x1121F6

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, 02, 00, 10, 00, 00, 00, 20, 00, 00, 80, 18, 00, 00, 00, 2C, 03, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 01, 00, 00, 00, 38, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 00, 00, 00, 00, 50, 00, 00, 00, 5C, 40, 11, 00, D0, 02, 00, 00, 00, 00, 00, 00, D0, 02, 34, 00, 00, 00, 56, 00, 53, 00, 5F, 00, 56, 00, 45, 00, 52, 00, 53, 00, 49, 00, 4F, 00, 4E, 00...
 
[+]

Entropy:
7.9256

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

Code size:
1.1 MB (1,114,624 bytes)

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