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maintainer.bak

focusbase

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file maintainer.bak by focusbase has been detected as adware by 28 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:
focusbase  (signed and verified)

Version:
1.0.5427.36948

MD5:
fe210a09cc99364bf5918e2f05e7423e

SHA-1:
9b6ece0ca6f90340b4f78b127099d5233373b778

SHA-256:
0138b6da290fd285290ebad89a1db0c49869ddec836b6c826402a3144a33b570

Scanner detections:
28 / 68

Status:
Adware

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

Analysis date:
5/3/2024 10:50:08 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CO
801

AhnLab V3 Security
Adware/Win32.SwiftBrowse
2014.11.17

Avira AntiVirus
ADWARE/BrowseFox.Gen7
7.11.186.146

avast!
Win32:Adware-BYZ [PUP]
2014.9-141125

AVG
Focusbase
2015.0.3279

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141125

Bitdefender
Adware.SwiftBrowse.CO
1.0.20.1645

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

Dr.Web
Trojan.BPlug.281
9.0.1.0329

Emsisoft Anti-Malware
Adware.SwiftBrowse.CO
8.14.11.25.02

ESET NOD32
Win32/BrowseFox
8.10734

F-Prot
W32/A-de841313
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CO
11.2014-25-11_3

G Data
Adware.SwiftBrowse.CO
14.11.24

IKARUS anti.virus
not-a-virus:AdWare.Yotoon
t3scan.1.8.3.0

K7 AntiVirus
Trojan
13.185.14021

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.2892

McAfee
Artemis!FE210A09CC99
5600.6935

MicroWorld eScan
Adware.SwiftBrowse.CO
15.0.0.987

NANO AntiVirus
Riskware.Win32.Kranet.dgiwfc
0.28.6.63362

nProtect
Adware.SwiftBrowse.CO
14.11.17.01

Panda Antivirus
Adware/BrowserFox
14.11.25.02

Qihoo 360 Security
HEUR/QVM10.1.Malware.Gen
1.0.0.1015

Reason Heuristics
PUP.focusbase.N
14.11.25.14

Sophos
Generic PUA JL
4.98

Vba32 AntiVirus
AdWare.Kranet
3.12.26.3

VIPRE Antivirus
Yontoo
34860

Zillya! Antivirus
Adware.Kranet.Win32.476
2.0.0.1983

File size:
120.8 KB (123,680 bytes)

Product version:
1.0.5427.36948

Language:
English (United States)

Common path:
C:\ProgramData\application data\f1c11deb-468d-4e28-a37d-be8513e1bc56\maintainer.bak

Digital Signature
Signed by:
focusbase

Authority:
VeriSign, Inc.

Valid from:
4/21/2014 7:00:00 PM

Valid to:
4/22/2015 6:59:59 PM

Subject:
CN=focusbase, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=focusbase, 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:
229BE95AFAF17766126629CC0A897C5F

File PE Metadata
Compilation timestamp:
11/10/2014 10:31:42 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:sK35/9oxfTk+hzvn67PQI0ypxCOTXbZv9:sKCLPBaLTLZv9

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:
6.1801

Code size:
68.5 KB (70,144 bytes)

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