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ysearchserviceun.exe

Alactro LLC

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application ysearchserviceun.exe by Alactro has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. This is the uninstaller utility registered in the Windows Control Panel for the program ysearchservice by ysearchservice.
Publisher:
Alactro LLC  (signed and verified)

Version:
1.0.0.0

MD5:
2c9885dcdc3241572593d7e47fddcf80

SHA-1:
6c662f61ff8863e05ddd4c4ac2893cc25e22b94d

SHA-256:
6413d86813e7065b321f18ea00c774e6cfe29c72581193bed77172fd172c3ef8

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:
1/12/2025 8:40:32 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.9.16.7

File size:
542.8 KB (555,808 bytes)

Product version:
1.0.0.0

Original file name:
ysearchservice Uninstaller.exe

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\Program Files\ysearchservice\ysearchserviceun.exe

Digital Signature
Signed by:
Alactro LLC

Authority:
VeriSign, Inc.

Valid from:
6/24/2013 7:00:00 PM

Valid to:
8/23/2016 6:59:59 PM

Subject:
CN=Alactro LLC, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Alactro LLC, L=Grandville, S=Michigan, 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:
018D4FCE8B07C5BF93892F3E2AB578D5

File PE Metadata
Compilation timestamp:
6/2/2015 11:27:14 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
12288:l83ZW51Z2wV0VdtpBQb1E9ckk+A4bQr5Xih8:sVG1ykD4bQr5Xih8

Entry address:
0x85A3E

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:
6.0165

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

Code size:
527 KB (539,648 bytes)

Program Uninstaller
Program name:
ysearchservice

Display publisher:
ysearchservice

Display version:
2015.05.14.012356

Uninstall string:
C:\Program Files (x86)\ysearchservice\ysearchserviceUn.exe OFS_


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