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utilappstein.exe

Appstein

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application utilappstein.exe by Appstein has been detected as adware by 6 anti-malware scanners. It runs as a separate (within the context of its own process) windows Service named “Update Appstein”. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
Appstein  (signed and verified)

Version:
1.0.5415.2609

MD5:
1e403f843213be4e0911f35143ae8846

SHA-1:
a5ae3cc745d2c01ea9efe3c5e3c1385aba7ff812

SHA-256:
b4b15842c181db3717034bafb234c45e1b1af5de419453266885d217d52c6fb0

Scanner detections:
6 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/24/2024 11:13:22 PM UTC  (a few moments ago)

Scan engine
Detection
Engine version

AVG
Generic
2015.0.3305

Baidu Antivirus
Adware.MSIL.BrowseFox
4.0.3.141030

ESET NOD32
MSIL/BrowseFox (variant)
8.10646

Malwarebytes
PUP.Optional.Appstein.A
v2014.10.30.06

Reason Heuristics
Adware.Yontoo.Service.M
14.10.29.7

VIPRE Antivirus
Threat.4741131
34232

File size:
511.3 KB (523,544 bytes)

Product version:
1.0.5415.2609

Original file name:
Appstein.exe

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\Program Files\appstein\bin\utilappstein.exe

Digital Signature
Signed by:
Appstein

Authority:
VeriSign, Inc.

Valid from:
5/1/2014 8:00:00 PM

Valid to:
5/2/2015 7:59:59 PM

Subject:
CN=Appstein, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Appstein, L=San Diego, S=California, C=US

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:
06773AB7EC074782D28F824F3C5632C1

File PE Metadata
Compilation timestamp:
10/29/2014 5:27:18 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
6.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
12288:mgk3z265mekizPqtH8HoaheBFIFAVmTL7YbjQflESmzuZ9/++S:mh3zrFDSPIZS

Entry address:
0x7F942

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...
 
[+]

Entropy:
5.9326

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

Code size:
502.5 KB (514,560 bytes)

Service
Display name:
Update Appstein

Type:
Win32OwnProcess


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