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maintainer.bak

ClearThink

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

Version:
1.0.5438.40379

MD5:
f54993a7feb83acf16ee450dd3ba9d10

SHA-1:
24af671891a85858215f88b3aa0025d0673f8767

SHA-256:
02b3e0192e867d30917cbed2c342c97da6913f21291d8cea184ffeb707d0fb4d

Scanner detections:
28 / 68

Status:
Adware

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

Analysis date:
5/10/2024 1:17:35 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CN
5827185

AhnLab V3 Security
Adware/Win32.SwiftBrowse
2014.11.23

Avira AntiVirus
ADWARE/BrowseFox.Gen7
7.11.188.58

avast!
Win32:Adware-BYZ [PUP]
141119-1

AVG
Generic
2015.0.3282

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141122

Bitdefender
Adware.SwiftBrowse.CN
1.0.20.1630

Bkav FE
W32.ClearThink.MaintainerQH.Adware
1.3.0.4959

Clam AntiVirus
Win.Adware.Agent-22685
0.98/21511

Comodo Security
Application.Win32.BrowseFox.B
20164

Dr.Web
Trojan.BPlug.281
9.0.1.05190

Emsisoft Anti-Malware
Adware.SwiftBrowse.CN
9.0.0.4570

ESET NOD32
Win32/BrowseFox.V potentially unwanted application
7.0.302.0

F-Prot
W32/A-de841313
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CN
11.2014-22-11_7

G Data
Adware.SwiftBrowse.CN
14.11.24

K7 AntiVirus
Trojan
13.185.14098

McAfee
Artemis!F54993A7FEB8
5600.6938

MicroWorld eScan
Adware.SwiftBrowse.CN
15.0.0.978

NANO AntiVirus
Riskware.Win32.Kranet.dgiwfc
0.28.6.63474

nProtect
Adware.SwiftBrowse.CN
14.11.21.01

Panda Antivirus
Trj/CI.A
14.11.22.05

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

Reason Heuristics
PUP.ClearThink.N
14.11.22.17

Sophos
Generic PUA CE
4.98

Vba32 AntiVirus
AdWare.Kranet
3.12.26.3

VIPRE Antivirus
Threat.4741131
35010

Zillya! Antivirus
Adware.Kranet.Win32.476
2.0.0.1991

File size:
120.7 KB (123,632 bytes)

Product version:
1.0.5438.40379

Language:
English (United States)

Common path:
C:\ProgramData\5fd2ca9d-b04a-4998-b7e8-2d30ebba8fbe\maintainer.bak

Digital Signature
Signed by:
ClearThink

Authority:
VeriSign, Inc.

Valid from:
10/8/2014 8:00:00 PM

Valid to:
8/5/2015 7:59:59 PM

Subject:
CN=ClearThink, O=ClearThink, 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:
59B72B1DB71CE323997B1EAF80E12AAE

File PE Metadata
Compilation timestamp:
11/22/2014 1:26:09 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
1536:33eRgxyOpGX5sfnC6P2dV59IikYYf9J892bbY+mHbcQ/Wm1sWjcdEPQI0ypxCO8P:HK35/9oxfTk+4vn6EPQI0ypxCOCXbZvX

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:
6.1808

Code size:
68.5 KB (70,144 bytes)

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