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browsestudiobho.dll

BrowseStudio

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module browsestudiobho.dll by BrowseStudio has been detected as adware by 20 anti-malware scanners. It is installed within the context of Internet Explore as a BHO (Browser Helper Object) under the name ‘BrowseStudio’. 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:
577e5d849e349aeb5e52cf3d050d2b2e

SHA-1:
afc78b15b129523671ef03bc53d74ab159aa5671

SHA-256:
dd7dbc8f644668050fdfb43cd44134c63ce22cdbdf7340f8d5d58c57e42c1629

Scanner detections:
20 / 68

Status:
Adware

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

Analysis date:
11/24/2024 10:26:50 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

Avira AntiVirus
ADWARE/BrowseFox.Gen2
7.11.186.146

AVG
BrowseFox.F
2015.0.3284

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141120

Clam AntiVirus
Win.Adware.Agent-19674
0.98/21411

Comodo Security
Application.Win32.BrowseFox.JM
20107

Dr.Web
Trojan.BPlug.167
9.0.1.0324

ESET NOD32
Win32/BrowseFox (variant)
8.10734

Fortinet FortiGate
Riskware/BrowseFox
11/20/2014

K7 AntiVirus
Unwanted-Program
13.185.14021

Malwarebytes
PUP.Optional.BrowseStudio.A
v2014.11.20.05

McAfee
BrowseFox-FRR
5600.6940

NANO AntiVirus
Trojan.Win32.BPlug.dfohwl
0.28.6.63362

Qihoo 360 Security
HEUR/QVM30.1.Malware.Gen
1.0.0.1015

Reason Heuristics
Adware.Yontoo.BHO.P
14.11.21.23

Sophos
Generic PUA KP
4.98

Trend Micro House Call
Suspicious_GEN.F47V1116
7.2.324

Vba32 AntiVirus
AdWare.LinkSwift
3.12.26.3

VIPRE Antivirus
Adware.BrowseFox
34860

Zillya! Antivirus
Backdoor.PePatch.Win32.48226
2.0.0.1982

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:\Program Files\browsestudio\browsestudiobho.dll

Digital Signature
Signed by:
BrowseStudio

Authority:
VeriSign, Inc.

Valid from:
9/1/2014 7:00:00 PM

Valid to:
9/2/2015 6:59:59 PM

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:
11/15/2014 12:30:18 PM

OS version:
6.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:Nn6oqa7ZcJ83Z2qJC0SzN+3aR4id15+s+xIaI+Y9RgLN:NOa7Zce3BCR/wxIpTgLN

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...
 
[+]

Entropy:
6.3538

Developed / compiled with:
Microsoft Visual C++

Code size:
159 KB (162,816 bytes)

Internet Explorer BHO
Display name:
BrowseStudio

CLSID:
{1e9e0e98-4ab7-40b0-a0ce-69105c1b7c92}


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

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

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