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grassmow.GCUpdate.dll

grassmow

This is the Google Chrome extension manager/updater for the Yontoo grassmow branded web browser plugin which injects banners, text-link and popup ads in the Chorme browser. The module grassmow.GCUpdate.dll by grassmow has been detected as adware by 5 anti-malware scanners. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
grassmow  (signed and verified)

Version:
1.0.5387.10164

MD5:
3dbd5e5d265e0c4058733fc25214ba74

SHA-1:
7fc64d7eb4c2181e3af31cddb8a46135a0e8e92c

SHA-256:
7aa743b21fb67c0bfb8bb40559732e4f1064f4d9d2eeabd5afc8eaef8652eabe

Scanner detections:
5 / 68

Status:
Adware

Explanation:
Part of the Yontoo distributed ad-supported web browser extension for Chrome.

Analysis date:
4/23/2024 11:01:45 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
Generic
2015.0.3334

ESET NOD32
MSIL/BrowseFox.G potentially unwanted application
7.0.302.0

Kaspersky
not-a-virus:HEUR:AdWare.MSIL.Kranet
14.0.0.3163

Reason Heuristics
Adware.Yontoo.grassmow.Q
14.10.2.8

VIPRE Antivirus
Threat.4741131
33520

File size:
1.3 MB (1,369,888 bytes)

Product version:
1.0.5387.10164

Original file name:
grassmow.GCUpdate.dll

File type:
Dynamic link library (Win32 DLL)

Language:
Language Neutral

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

Digital Signature
Signed by:
grassmow

Authority:
VeriSign, Inc.

Valid from:
4/29/2014 1:00:00 AM

Valid to:
4/30/2015 12:59:59 AM

Subject:
CN=grassmow, OU=Digital ID Class 3 - Microsoft Software Validation v2, 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:
46F979858F2F3241487CBA3EF684BAE8

File PE Metadata
Compilation timestamp:
10/1/2014 7:39:26 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
8.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
24576:MaYZN7y0cESSThYkChOxBL6svGnBMZL1+CfhhbAPPyI6VndIKtTPm:M/NG0cEv/iOnb4MZ0CHAHyTTm

Entry address:
0x14E4F6

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:
7.5366

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

Code size:
1.3 MB (1,361,408 bytes)

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