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grassmowuninstall.exe

grassmow

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application grassmowuninstall.exe by grassmow has been detected as adware by 5 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. This is the uninstaller utility registered in the Windows Control Panel for the program grassmow by grassmow. 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)

MD5:
9f5bef9416ad0e198c69dd2ae052d79e

SHA-1:
c9f7edf862777b706176ec3692e883f58023b0b7

SHA-256:
5d75983c0ad15f8d93f2cfe4236e27bcb2ef9be7da6d2ad70a49bce56fc978a2

Scanner detections:
5 / 68

Status:
Adware

Explanation:
This is the installer/uninstaller for the Yontoo branded (grassmow) adware program. The main protgram is desigend to deliver advertisements to the user's web browser through injection.

Analysis date:
4/25/2024 4:54:53 PM UTC  (today)

Scan engine
Detection
Engine version

AVG
Generic
2015.0.3334

Clam AntiVirus
Win.Adware.Linkular-1
0.98/19469

ESET NOD32
Win32/BrowseFox.C potentially unwanted application
7.0.302.0

Reason Heuristics
Adware.Yontoo.grassmow.R
14.10.2.8

VIPRE Antivirus
Threat.4741131
33120

File size:
253.1 KB (259,224 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Program Files\grassmow\grassmowuninstall.exe

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:
12/5/2009 10:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:FZ+11/OSFy/1RWBT5n3AjJrnuwZm/G/HceM:wns1s15ngnup/G/8j

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.8709

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

Program Uninstaller
Program name:
grassmow

Display publisher:
grassmow

Display version:
2014.10.02.053924

Uninstall string:
C:\Program Files (x86)\grassmow\grassmowuninstall.exe


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