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browsepaxsetup.exe

Browse Pax

This is the installer and setup program from the Browse Pax branded Yontoo adware web browser extension. This adware injects various forms of advertisements in the user's web browser based on the HTML content and URLs viewed. Ad include banners, in-line context text links, coupons, and search. The program will install an auto-updating Windows service that will update the software with additional features. The application browsepaxsetup.exe by Browse Pax has been detected as adware by 22 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. 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:
Browse Pax  (signed and verified)

MD5:
5a9b4d21cc84b014c0dbdf9b893b3208

SHA-1:
28f85c3272d62368f90bc213b2c05cb64bb72df8

SHA-256:
907eb6486e86705d9efb111f557cbdb3f9d6ae21ae61f45f9e7596c17c835e9a

Scanner detections:
22 / 68

Status:
Adware

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

Analysis date:
12/24/2024 4:42:27 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.BE
697

Avira AntiVirus
ADWARE/BrowseFox.Gen
7.11.212.188

avast!
Win32:PUP-gen [PUP]
2014.9-150309

AVG
BrowseFox.H
2016.0.3175

Bitdefender
Adware.BrowseFox.BE
1.0.20.340

Dr.Web
Trojan.Yontoo.766
9.0.1.068

Emsisoft Anti-Malware
Adware.BrowseFox.BE
8.15.03.09.12

ESET NOD32
Win32/BrowseFox.C potentially unwanted
9.11244

F-Prot
W32/S-b5aa130f
v6.4.7.1.166

G Data
Adware.BrowseFox.BE
15.3.25

IKARUS anti.virus
AdWare.BrowseFox
t3scan.1.8.6.0

K7 AntiVirus
Unwanted-Program
13.1915110

Malwarebytes
PUP.Optional.BPlug
v2015.03.09.12

McAfee
BrowseFox-FWC
5600.6831

MicroWorld eScan
Adware.BrowseFox.BE
16.0.0.204

NANO AntiVirus
Trojan.Win32.BPlug.dfsehz
0.30.0.296

nProtect
Adware.BrowseFox.BE
15.02.27.01

Reason Heuristics
PUP.Installer.Yontoo
15.3.9.13

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.15307

Sophos
Generic PUA LI
4.98

Trend Micro House Call
Suspici.18833C91
7.2.68

VIPRE Antivirus
Trojan.Win32.Generic
37966

File size:
569.5 KB (583,152 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\browsepaxsetup.exe

Digital Signature
Signed by:
Browse Pax

Authority:
VeriSign, Inc.

Valid from:
11/4/2014 4:00:00 PM

Valid to:
12/5/2015 3:59:59 PM

Subject:
CN=Browse Pax, O=Browse Pax, 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:
3042BEE729064AB94DEF88F30ACB3ED0

File PE Metadata
Compilation timestamp:
12/5/2009 2:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:6Msj+JuiN1s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7hIJBzJsj:6MW+IiN6j8/z0FmcLbH1+Cj

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9815

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file browsepaxsetup.exe has been seen being distributed by the following URL.

http://d1ykyz0mbyn4to.cloudfront.net/cl/inst/bundles/BrowsePax_Keydownload/.../BrowsePaxSetup.exe

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to wac.edgecastcdn.net  (72.21.81.13:80)

TCP (HTTP):
Connects to service.yontoo.com  (8.25.35.148:80)

TCP (HTTP):
Connects to api.yontoo.com  (8.25.35.15:80)

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