home

grassmow.expext.dll

grassmow

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

Version:
1.0.6010.15642

MD5:
d1bc05b36c903d4cd15d4867fe3c3013

SHA-1:
fdb9164d1f1f849bd5ff3eb0b78a9651ac600fa8

SHA-256:
8c3052b6e843f13ab1c628db89ec51564322198cd8cf92fd89b3fd5badb5ca37

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:
4/14/2025 1:55:22 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.12.6.22

File size:
714.7 KB (731,888 bytes)

Product version:
1.0.6010.15642

Original file name:
2016061516.dll

File type:
Dynamic link library (Win32 DLL)

Language:
Language Neutral

Common path:
C:\Program Files\grassmow\bin\plugins\grassmow.expext.dll

Digital Signature
Signed by:
grassmow

Authority:
VeriSign, Inc.

Valid from:
4/23/2015 9:00:00 AM

Valid to:
6/22/2016 8:59:59 AM

Subject:
CN=grassmow, O=grassmow, 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:
6097683DE3EA69DB932CBE8A09BDCA90

File PE Metadata
Compilation timestamp:
6/16/2016 1:41:30 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
11.0

.NET CLR dependent:
Yes

Entry address:
0xB29DE

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, 20, 0B, 00, 0C, 00, 00, 00, E0, 39, 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:
6.6196

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

Code size:
706.5 KB (723,456 bytes)

Remove grassmow.expext.dll - Powered by Reason Core Security
herdProtect is a second line of defense malware removal platform powered by 68 anti-malware engines in the cloud. Since no single anti-malware program is perfect 100% of the time, herdProtect utilizes a 'herd' of multiple engines to guarantee the widest coverage and the earliest possible detection.