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maintainer.exe

BrowseStudio

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application maintainer.exe by BrowseStudio has been detected as adware by 23 anti-malware scanners. It runs as a separate (within the context of its own process) windows Service named “MaintainerSvc4.52.864054”. 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:
BrowseStudio  (signed and verified)

Version:
1.0.5443.17117

MD5:
f0fdaed6cf7ce2aec3ae0a38fc36d39c

SHA-1:
847825a0ef9aad1a8632c9f5f43e0dde57d39341

SHA-256:
a233850a9238241d3a9351140bcedc9ae9c33ce2ffcf07e96662d31df4f89bfb

Scanner detections:
23 / 68

Status:
Adware

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

Analysis date:
4/19/2024 5:39:13 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CS
800

AhnLab V3 Security
Adware/Win32.SwiftBrowse
2014.11.27

Avira AntiVirus
Adware/BrowseFox.aol
7.11.189.0

avast!
Win32:Adware-BYZ [PUP]
2014.9-141126

AVG
Generic
2015.0.3278

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141126

Bitdefender
Adware.SwiftBrowse.CS
1.0.20.1650

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

Comodo Security
Application.Win32.BrowseFox.B
20199

Dr.Web
Trojan.BPlug.281
9.0.1.0330

Emsisoft Anti-Malware
Adware.SwiftBrowse.CS
8.14.11.26.01

ESET NOD32
Win32/BrowseFox
8.10785

F-Prot
W32/A-de841313
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CS
11.2014-26-11_4

G Data
Adware.SwiftBrowse.CS
14.11.24

K7 AntiVirus
Trojan
13.186.14150

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.2887

MicroWorld eScan
Adware.SwiftBrowse.CS
15.0.0.990

NANO AntiVirus
Riskware.Win32.Kranet.dgiwfc
0.28.6.63726

nProtect
Trojan-Clicker/W32.Yotoon.123632
14.11.26.01

Reason Heuristics
PUP.Service.BrowseStudio.K
14.11.26.13

Vba32 AntiVirus
AdWare.Yotoon
3.12.26.3

Zillya! Antivirus
Adware.Kranet.Win32.476
2.0.0.1994

File size:
120.7 KB (123,632 bytes)

Product version:
1.0.5443.17117

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\ProgramData\ddc24aa9-6c5d-44d0-8c40-9bed83bb2ab7\maintainer.exe

Digital Signature
Signed by:
BrowseStudio

Authority:
VeriSign, Inc.

Valid from:
9/2/2014 3:00:00 AM

Valid to:
9/3/2015 2:59:59 AM

Subject:
CN=BrowseStudio, O=BrowseStudio, L=San Diego, 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:
11AE532A33120159E1078A0D3EDE88C9

File PE Metadata
Compilation timestamp:
11/26/2014 7:30:41 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:RK35/9oxfTk+Mvn6EPQI0ypxCOK3bZvNF:RKCLPY1LKrZvNF

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...
 
[+]

Code size:
68.5 KB (70,144 bytes)

Service
Display name:
MaintainerSvc4.52.864054

Type:
Win32OwnProcess

Depends on:
RPCSS


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