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firefox.exe

OutBrowse

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The application firefox.exe by OutBrowse has been detected as adware by 10 anti-malware scanners. The program is a setup application that uses the OutBrowse Revenyou installer. The setup routine uses the RevenYou.Com Pay Per Install platform (OutBrowse) which bundles additional software offers inclduing toolbars, extensions, PC utilities as well as other PUPs. With this installer, users are expecting to download the free Mozilla Firefox web browser but before that occurs they may be presented with additional offers, mostly potentially unwanted software or adware.
Publisher:
OutBrowse  (signed and verified)

MD5:
9b7494adeeb5e0abce7516e22e26f7fa

SHA-1:
abf6e7e9298d1bb72373f3d881f30eac5d6958a0

SHA-256:
6b56533cb1a91cab92312c4d8fff56885483f9669ab847d61fef9eaf3b37b592

Scanner detections:
10 / 68

Status:
Adware

Explanation:
Bundles additional adware offers during download and installation using the OutBrowse installer.

Description:
This is also known as bundleware, or downloadware, which is an downloader designed to simply deliver ad-supported offers in the setup routine of an otherwise legitimate software.

Analysis date:
4/24/2024 8:28:15 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
MalSign.OutBrowse
2015.0.3403

Bkav FE
W32.Clod66a.Trojan
1.3.0.4613

Dr.Web
Adware.Downware.1664
9.0.1.0205

ESET NOD32
Win32/OutBrowse
8.9190

Kaspersky
not-a-virus:Downloader.NSIS.OutBrowse
14.0.0.3512

McAfee
Artemis!9B7494ADEEB5
5600.7059

Reason Heuristics
PUP.OutBrowse.H
14.8.7.20

Trend Micro House Call
TROJ_GEN.F47V1211
7.2.205

Vba32 AntiVirus
Downloader.OutBrowse
3.12.24.3

VIPRE Antivirus
OutBrowse
24856

File size:
937.6 KB (960,096 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
OutBrowse Revenyou (using Nullsoft Install System)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\firefox.exe

Digital Signature
Signed by:
OutBrowse

Authority:
VeriSign, Inc.

Valid from:
10/23/2013 8:00:00 PM

Valid to:
10/24/2014 7:59:59 PM

Subject:
CN=OutBrowse, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=OutBrowse, L=Ramat Gan, S=Ramat Gan, C=IL

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:
56A6FE571611B68C9224798AD62913CA

File PE Metadata
Compilation timestamp:
12/5/2009 5:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
24576:rGmxwao2GGLN/w4TtgKiKD1Y5nYhZlaEOmUdk+s7mh3G7z:bwaoyLNosmKiKpY5g7JOm0k+s7mh3G7z

Entry address:
0x30FA

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, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9264

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file firefox.exe has been seen being distributed by the following 5 URLs.

http://downloader.ez-download.com/download.php?id=23a0a912fd4ad218814beb3f5bd715001d751573&z=8&p=eyJweSI6ImV6IiwicnMiOiJnb29nbGUiLCJydCI6InNlYXJjaCIsImMiOiJ1cyIsIm8iOiJ3aW43IiwiYiI6ImNoMzEiLCJ1X2lkIjoiZXpfNTJhOTE3YzVlYzBlYTcuMjg0MjYzNjEiLCJwYV9pZCI6IjgiLCJzdF9pZCI6IjAiLCJzcF9pZCI6IjAwMDAtMDAwMCIsInRzIjoxMzg2ODEzNDEyLCJrdyI6bnVsbCwiY3UiOm51bGwsImNhIjpudWxsfQ==

http://cdn.app2desktop.com/misc/.../Firefox.exe

http://default-page.com/downloader/.../?d1=12&d2=2&d3=1&d4=15&d5=00000000

http://default-page.com/.../firefox?d1=12&d2=2&d3=1&d4=15&d5=00000000

http://downloader.ez-download.com/download.php?id=23a0a912fd4ad218814beb3f5bd715001d751573&z=8&p=eyJweSI6ImV6IiwicnMiOiJiaW5nIiwicnQiOiJzZWFyY2giLCJjIjoidXMiLCJvIjoid2luOHB0MSIsImIiOiJjaDMxIiwidV9pZCI6ImV6XzUyYTkwNTg0YTQ2Y2Y1LjE3MTgzNTYyIiwicGFfaWQiOiI4Iiwic3RfaWQiOiIwIiwic3BfaWQiOiIwMDAwLTAwMDAiLCJ0cyI6MTM4NjgwODcwOCwia3ciOiJmaXJlZm94IGRvd25sb2FkIiwiY3UiOiJmaXJlZm94IGRvd25sb2FkIiwiY2EiOm51bGx9

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