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maintainer.bak

ConstaSurf

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file maintainer.bak by ConstaSurf has been detected as adware by 34 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:
ConstaSurf  (signed and verified)

Version:
1.0.5495.22809

MD5:
ec646cdddb40d4c6b44860a8031779ec

SHA-1:
2727bb1f823d4c30fe3a76605768d36f03365c97

SHA-256:
904287b27a4e8de39d7364a2d0c34920f41058175e4b42d964a7389f19e12db4

Scanner detections:
34 / 68

Status:
Adware

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

Analysis date:
4/26/2024 2:38:45 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.N
734

AhnLab V3 Security
Adware/Win32.SwiftBrowse
2015.01.26

Avira AntiVirus
Adware/BrowseFox.apf
7.11.205.14

avast!
Win32:Adware-BYZ [PUP]
2014.9-150201

AVG
Generic6
2016.0.3212

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.1521

Bitdefender
Adware.SwiftBrowse.N
1.0.20.160

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

Comodo Security
Application.Win32.BrowseFox.B
20843

Dr.Web
Trojan.BPlug.437
9.0.1.032

Emsisoft Anti-Malware
Adware.SwiftBrowse.N
8.15.02.01.03

ESET NOD32
Win32/BrowseFox
9.11071

Fortinet FortiGate
Adware/BrowseFox
2/1/2015

F-Prot
W32/A-de841313
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.N
11.2015-01-02_1

G Data
Adware.SwiftBrowse
15.2.24

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.8.6.0

K7 AntiVirus
Trojan
13.192.14746

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.2554

Malwarebytes
PUP.Optional.SwiftBrowse
v2015.02.01.03

McAfee
BrowseFox-FTR
5600.6868

MicroWorld eScan
Adware.SwiftBrowse.N
16.0.0.96

NANO AntiVirus
Riskware.Win32.Kranet.dgiwfc
0.30.0.64812

nProtect
Trojan-Clicker/W32.Yotoon.123680
15.01.23.01

Panda Antivirus
Trj/CI.A
15.02.01.03

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

Quick Heal
AdWare.Yotoon.A5
2.15.14.00

Reason Heuristics
PUP.Yontoo
15.2.1.3

Sophos
Browse Fox
4.98

SUPERAntiSpyware
Adware.SwiftBrowse
10081

Trend Micro House Call
TROJ_GEN.R0C1C0PAH15
7.2.32

Trend Micro
TROJ_GEN.R0C1C0PAH15
10.465.01

Vba32 AntiVirus
AdWare.Yotoon
3.12.26.3

VIPRE Antivirus
Yontoo
36978

File size:
120.8 KB (123,680 bytes)

Product version:
1.0.5495.22809

Language:
English (United States)

Common path:
C:\ProgramData\8a64b500-91d9-42f2-8d4d-776c5ec0ee9c\maintainer.bak

Digital Signature
Signed by:
ConstaSurf

Authority:
VeriSign, Inc.

Valid from:
3/18/2014 5:00:00 PM

Valid to:
3/19/2015 4:59:59 PM

Subject:
CN=ConstaSurf, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=ConstaSurf, 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:
46A82C62F93896A2C29C94EC6C4D8A3D

File PE Metadata
Compilation timestamp:
1/17/2015 12:40:24 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:wK35/9oxfTk+1vn6IPQI0ypxCO63bZvr0:wKCLPRNL6rZvQ

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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