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betarez.expextdll.dll

Beta Rez

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

Version:
1.0.5514.38922

MD5:
8667af3301e9841138d5d75a6eb317dc

SHA-1:
f6325f29128b1c2ed81a621a6af81cfc6ab3672c

SHA-256:
a5af7db8fc0ac07783c0cbdde0d771495bb883640414fdd60929e65c9d03cc31

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 3:24:27 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
Adware.Yontoo.BetaRez (M)
16.2.2.7

File size:
80.3 KB (82,208 bytes)

Product version:
1.0.5514.38922

File type:
Dynamic link library (Win32 DLL)

Common path:
C:\Program Files\beta rez\bin\betarez.expextdll.dll

Digital Signature
Signed by:
Beta Rez

Authority:
VeriSign, Inc.

Valid from:
3/19/2014 3:00:00 AM

Valid to:
3/20/2015 2:59:59 AM

Subject:
CN=Beta Rez, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Beta Rez, 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:
551AC20E6814AE1BD6F9CC331B9C1C38

File PE Metadata
Compilation timestamp:
2/6/2015 8:37:48 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
768:4EULKvP9V9OZY8scRbs3KmqoGaRaebQxk92GkrhgZEnyteDH016D1XApn2YEDZJW:ELKtnOmes6mRj91k9znae6aQwN1o

Entry address:
0x3820

Entry point:
8B, FF, 55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 1E, 2F, 00, 00, FF, 75, 08, 8B, 4D, 10, 8B, 55, 0C, E8, EC, FE, FF, FF, 59, 5D, C2, 0C, 00, 8B, FF, 55, 8B, EC, 83, EC, 20, 8B, 45, 08, 56, 57, 6A, 08, 59, BE, 70, D2, 00, 10, 8D, 7D, E0, F3, A5, 89, 45, F8, 8B, 45, 0C, 5F, 89, 45, FC, 5E, 85, C0, 74, 0C, F6, 00, 08, 74, 07, C7, 45, F4, 00, 40, 99, 01, 8D, 45, F4, 50, FF, 75, F0, FF, 75, E4, FF, 75, E0, FF, 15, 80, D0, 00, 10, C9, C2, 08, 00, B8, 93, 72, 00, 10, A3, D8, 19, 01, 10, C7, 05, DC, 19, 01, 10, 89...
 
[+]

Entropy:
6.3891

Code size:
47.5 KB (48,640 bytes)

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