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browsestudio.dll

BrowseStudio

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module browsestudio.dll by BrowseStudio has been detected as adware by 31 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. The file has been seen being downloaded from install-cdn.browsestudio.com.
Publisher:
BrowseStudio  (signed and verified)

Product:
BrowseStudio

Version:
1.0.0.3

MD5:
5487a6756856a63c42ff38f95cc6dbac

SHA-1:
698411fcac44132781b0bd782afe5cc2719e4028

SHA-256:
40e5d019326a61df07e44299e2ea83cd1d7b36d316ac8b6cf5d51d17bceb7cd1

Scanner detections:
31 / 68

Status:
Adware

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

Analysis date:
11/5/2024 11:12:00 PM UTC  (a few moments ago)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Adware.BHO.Agent.4
359

Agnitum Outpost
PUA.Agent
7.1.1

Avira AntiVirus
APPL/BrowseFox.Gen2
7.11.166.4

AVG
Adware BrowseFox.F
2017.0.2837

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.16211

Bitdefender
Gen:Variant.Adware.BHO.Agent.4
1.0.20.210

Clam AntiVirus
Win.Adware.Agent-7675
0.98/21411

Comodo Security
Application.Win32.Altbrowse.AK
19119

Dr.Web
Trojan.BPlug.167
9.0.1.042

Emsisoft Anti-Malware
Gen:Variant.Adware.BHO.Agent
8.16.02.11.01

ESET NOD32
Win32/BrowseFox.O potentially unwanted application
10.7.0.302.0

Fortinet FortiGate
Adware/Agent
2/11/2016

F-Prot
W32/BadBHO.AW.gen
v6.4.7.1.166

F-Secure
Gen:Variant.Adware.BHO.Agent.4
11.2016-11-02_5

G Data
Gen:Variant.Adware.BHO.Agent
16.2.24

K7 AntiVirus
Unwanted-Program
13.185.14085

Kaspersky
not-a-virus:AdWare.Win32.Agent
14.0.0.680

Malwarebytes
PUP.Optional.Zebar.A
v2016.02.11.01

McAfee
Artemis!CD96DF17AA75
5600.6493

MicroWorld eScan
Gen:Variant.Adware.BHO.Agent.4
17.0.0.126

NANO AntiVirus
Riskware.Win32.Agent.czmzab
0.28.2.61349

nProtect
Trojan-Clicker/W32.Agent.249624.B
14.08.07.01

Panda Antivirus
Trj/CI.A
16.02.11.01

Qihoo 360 Security
HEUR/Malware.QVM30.Gen
1.0.0.1015

Reason Heuristics
PUP.Yontoo.BrowseStudio (M)
16.2.11.1

Sophos
BrowseSmart
4.98

SUPERAntiSpyware
Adware.BrowseFox/Variant
9331

Trend Micro House Call
Suspicious_GEN.F47V0807
7.2.42

Vba32 AntiVirus
AdWare.LinkSwift
3.12.26.3

VIPRE Antivirus
Yontoo
32026

Zillya! Antivirus
Adware.Agent.Win32.9402
2.0.0.1850

File size:
244.7 KB (250,608 bytes)

Product version:
1.0.0.3

Copyright:
(c) BrowseStudio. All rights reserved.

Original file name:
BrowseStudioIEClient.dll

File type:
Dynamic link library (Win32 DLL)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\ie\{random}\browsestudio.dll

Digital Signature
Signed by:
BrowseStudio

Authority:
VeriSign, Inc.

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

Valid to:
9/3/2015 1:59:59 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:
11/19/2014 2:24:16 PM

OS version:
6.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:Cn6oqa7ZcJ83Z2qJC0SzN+3aR4id15+s+xIaIUY9RoLg:COa7Zce3BCR/wxInToLg

Entry address:
0x12854

Entry point:
55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 41, 8D, 00, 00, FF, 75, 10, FF, 75, 0C, FF, 75, 08, E8, 07, 00, 00, 00, 83, C4, 0C, 5D, C2, 0C, 00, 6A, 0C, 68, 90, 30, 03, 10, E8, BD, 01, 00, 00, 33, C0, 40, 8B, 75, 0C, 85, F6, 75, 0C, 39, 35, 44, 78, 03, 10, 0F, 84, E4, 00, 00, 00, 83, 65, FC, 00, 83, FE, 01, 74, 05, 83, FE, 02, 75, 35, 8B, 0D, 1C, A5, 02, 10, 85, C9, 74, 0C, FF, 75, 10, 56, FF, 75, 08, FF, D1, 89, 45, E4, 85, C0, 0F, 84, B1, 00, 00, 00, FF, 75, 10, 56, FF, 75, 08, E8, 11, FE, FF, FF, 89, 45, E4...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
159 KB (162,816 bytes)

The file browsestudio.dll has been seen being distributed by the following URL.

http://install-cdn.browsestudio.com/bed?bet=3

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