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appsteinuninstall.exe

Appstein

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application appsteinuninstall.exe by Appstein has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. This is the uninstaller utility registered in the Windows Control Panel for the program Appstein by Appstein.
Publisher:
Appstein  (signed and verified)

MD5:
8bc55acb43917d6700d615ede6350ff7

SHA-1:
05079cacc43c4945089648326a40cd3d4e3e2b81

SHA-256:
8953fbb5d528260ec84f4c08ad29890cefbbfefa49cfbe8800ac9d78795dc300

Scanner detections:
1 / 68

Status:
Adware

Explanation:
This is the installer/uninstaller for the Yontoo branded (appstein) adware program. The main protgram is desigend to deliver advertisements to the user's web browser through injection.

Analysis date:
5/11/2024 4:00:37 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
Adware.Yontoo (M)
17.2.20.15

File size:
257.7 KB (263,880 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Program Files\appstein\appsteinuninstall.exe

Digital Signature
Signed by:
Appstein

Authority:
VeriSign, Inc.

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

Valid to:
5/2/2015 4:59:59 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:
12/5/2009 2:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.8692

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

Program Uninstaller
Program name:
Appstein

Display publisher:
Appstein

Display version:
2014.10.28.002701

Uninstall string:
C:\Program Files (x86)\Appstein\Appsteinuninstall.exe


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