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grassmow.expext.exe

grassmow

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application grassmow.expext.exe by grassmow has been detected as adware by 9 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:
1.0.6242.39491

MD5:
fd6aef104aae1916243a505f0368f5f1

SHA-1:
fb08f37348308d2772f618f07e2841314fb24c6d

SHA-256:
04032a9f4a4bf4c5940686b8686b616ca550bdd81a00ef238debb786942112be

Scanner detections:
9 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/26/2024 12:24:27 PM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
PUP/Win32.BrowseFox
2014.12.22

Avira AntiVirus
Adware/BrowseFox.aph
7.11.197.16

AVG
Generic
2015.0.3254

Clam AntiVirus
Win.Adware.Swiftbrowse-909
0.98/19815

ESET NOD32
Win32/BrowseFox.AA potentially unwanted application
7.0.302.0

K7 AntiVirus
Unwanted-Program
13.188.14395

Reason Heuristics
Adware.Yontoo.grassmow.O
14.12.21.8

SUPERAntiSpyware
Adware.BrowserFox/Variant
10164

VIPRE Antivirus
Threat.4741131
35418

File size:
99.3 KB (101,664 bytes)

Product version:
1.0.6242.39491

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\Program Files\grassmow\bin\grassmow.expext.exe

Digital Signature
Signed by:
grassmow

Authority:
VeriSign, Inc.

Valid from:
4/28/2014 8:00:00 PM

Valid to:
4/29/2015 7:59:59 PM

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:
12/20/2014 8:40:37 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
1536:WB61AHhYfg0e+t/gEWGnadKCxXfPWK6tHEkqnMB9uooSVgkRwPw:FchYTei7YxXf+K69RoSVg6wY

Entry address:
0x561E

Entry point:
E8, AB, 3C, 00, 00, E9, 89, FE, FF, FF, 8B, FF, 55, 8B, EC, 83, 7D, 08, 00, 74, 2D, FF, 75, 08, 6A, 00, FF, 35, 64, 7F, 41, 00, FF, 15, 4C, 20, 41, 00, 85, C0, 75, 18, 56, E8, 2F, 08, 00, 00, 8B, F0, FF, 15, 68, 20, 41, 00, 50, E8, DF, 07, 00, 00, 59, 89, 06, 5E, 5D, C3, CC, CC, CC, CC, CC, CC, CC, CC, CC, CC, CC, CC, CC, CC, 8B, 54, 24, 0C, 8B, 4C, 24, 04, 85, D2, 74, 69, 33, C0, 8A, 44, 24, 08, 84, C0, 75, 16, 81, FA, 80, 00, 00, 00, 72, 0E, 83, 3D, C0, 91, 41, 00, 00, 74, 05, E9, CD, 3C, 00, 00, 57, 8B...
 
[+]

Entropy:
6.4315

Code size:
65.5 KB (67,072 bytes)

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