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Yulasee.OptChecker.dll

Yula

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module Yulasee.OptChecker.dll by Yula has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
Yula  (signed and verified)

Version:
1.0.5464.27870

MD5:
48687daf6ed9a3380dadceb27e200b7c

SHA-1:
d71864e67722a52e8f728c232d209fa26d117725

SHA-256:
22e99263412b8eae6e317a21f24e644538a652b50843c48c8d8eaaabf81f92b6

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:
4/25/2024 8:52:06 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.9.11

File size:
723.8 KB (741,144 bytes)

Product version:
1.0.5464.27870

Original file name:
Yulasee.OptChecker.dll

File type:
Dynamic link library (Win32 DLL)

Language:
Language Neutral

Common path:
C:\Program Files\yula\bin\plugins\yulasee.optchecker.dll

Digital Signature
Signed by:
Yula

Authority:
VeriSign, Inc.

Valid from:
3/14/2014 5:00:00 PM

Valid to:
3/15/2015 4:59:59 PM

Subject:
CN=Yula, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Yula, L=Santa Monica, 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:
4B2C13D47B877663487D003C021E7110

File PE Metadata
Compilation timestamp:
12/17/2014 3:29:06 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
6.0

.NET CLR dependent:
Yes

Entry address:
0xB4B62

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, 02, 00, 00, 00, 70, 00, 00, 00, A4, 4B, 0B, 00, A4, 2D, 0B, 00, 52, 53, 44, 53, 8F, 89, 5A, 5A, 09, 5E, B0, 47, 8F, BD, 63, A5, 95, 58, C4, 66, 01, 00, 00, 00, 44, 3A, 5C, 55, 74, 69, 6C, 69, 74, 69, 65, 73, 5C, 30, 6E, 69, 79, 67, 6D, 33, 32, 2E, 6A, 73, 74, 5C, 44, 65, 73, 6B, 74, 6F, 70, 5C, 44, 65, 73, 6B...
 
[+]

Entropy:
5.8746

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

Code size:
715.5 KB (732,672 bytes)

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