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maintainer.bak

grassmow

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file maintainer.bak by grassmow has been detected as adware by 20 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:
1.0.5416.28302

MD5:
269d591872671baf087b092a7fefeb47

SHA-1:
e1fdb068f5c6681530bb187503ad4e87a4063db4

SHA-256:
d380151c8b304658451aae99cb455f5e8ff2f5fe5121f0d1e5bbeb97596a5c62

Scanner detections:
20 / 68

Status:
Adware

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

Analysis date:
4/25/2024 8:40:48 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Adware.SwiftBrowse.1
826

AhnLab V3 Security
Adware/Win32.SwiftBrowse
2014.11.01

Avira AntiVirus
ADWARE/BrowseFox.Gen7
7.11.182.172

avast!
Win32:Adware-BYZ [PUP]
2014.9-141031

AVG
Generic
2015.0.3304

Bitdefender
Gen:Variant.Adware.SwiftBrowse.1
1.0.20.1520

Clam AntiVirus
Win.Adware.Agent-22685
0.98/21411

Dr.Web
Trojan.BPlug.281
9.0.1.0304

Emsisoft Anti-Malware
Gen:Variant.Adware.SwiftBrowse
8.14.10.31.10

ESET NOD32
Win32/BrowseFox
8.10653

Fortinet FortiGate
Riskware/BrowseFox
10/31/2014

F-Secure
Gen:Variant.Adware.SwiftBrowse.1
11.2014-31-10_6

G Data
Gen:Variant.Adware.SwiftBrowse
14.10.24

MicroWorld eScan
Gen:Variant.Adware.SwiftBrowse.1
15.0.0.912

NANO AntiVirus
Riskware.Win32.Kranet.dgiwfc
0.28.6.62995

Qihoo 360 Security
Win32/Virus.Adware.708
1.0.0.1015

Reason Heuristics
PUP.grassmow.N
14.10.31.21

Vba32 AntiVirus
AdWare.Kranet
3.12.26.3

VIPRE Antivirus
Yontoo
34416

Zillya! Antivirus
Adware.Kranet.Win32.476
2.0.0.1973

File size:
120.8 KB (123,680 bytes)

Product version:
1.0.5416.28302

Language:
English (United States)

Common path:
C:\ProgramData\application data\df3f9360-a3a2-443d-ba85-161336eea54e\maintainer.bak

Digital Signature
Signed by:
grassmow

Authority:
VeriSign, Inc.

Valid from:
4/28/2014 7:00:00 PM

Valid to:
4/29/2015 6:59:59 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:
10/30/2014 5:43:33 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
1536:M3eRgxyOpGX5sfnC6P2dV59IikYYf9J892bbY+mybcQ/Wm1sWjcd8PQI0ypxCO8/:8K35/9oxfTk+Fvn68PQI0ypxCOK3bZvn

Entry address:
0x8A72

Entry point:
E8, 95, 57, 00, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 81, EC, 28, 03, 00, 00, A1, 68, B2, 41, 00, 33, C5, 89, 45, FC, 83, 7D, 08, FF, 57, 74, 09, FF, 75, 08, E8, 79, 45, 00, 00, 59, 83, A5, E0, FC, FF, FF, 00, 6A, 4C, 8D, 85, E4, FC, FF, FF, 6A, 00, 50, E8, 7A, F3, FF, FF, 8D, 85, E0, FC, FF, FF, 89, 85, D8, FC, FF, FF, 8D, 85, 30, FD, FF, FF, 83, C4, 0C, 89, 85, DC, FC, FF, FF, 89, 85, E0, FD, FF, FF, 89, 8D, DC, FD, FF, FF, 89, 95, D8, FD, FF, FF, 89, 9D, D4, FD, FF, FF, 89, B5, D0, FD, FF, FF, 89, BD, CC...
 
[+]

Entropy:
6.1805

Code size:
68.5 KB (70,144 bytes)

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