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firefox_install.exe

Mozilla Firefox 2015

Download Assistant

This is part of the Air Installer, a download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed with minimal consent. The application firefox_install.exe by Download Assistant has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the AirInstaller Download Manager installer. 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:
Download Assistant  (signed and verified)

Product:
Mozilla Firefox 2015

Version:
3.0.0.130

MD5:
59dc90eedf42d817b87d89b9d62c5c6c

SHA-1:
50f9e5b404baeee12fcb5f3660d9e620ff397ea6

SHA-256:
73cd6b3313c294457686989109db83c977bf907171aea2adf97b9f68151c77bf

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

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:
12/26/2024 12:03:44 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software (M)
16.7.22.10

File size:
1.1 MB (1,129,776 bytes)

Product version:
3.0.0.130

Copyright:
(c) Download Assistant

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
Language Neutral

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

Digital Signature
Signed by:
Download Assistant

Authority:
Symantec Corporation

Valid from:
7/28/2015 10:00:00 AM

Valid to:
7/28/2016 9:59:59 AM

Subject:
CN=Download Assistant, O=Download Assistant, L=Victoria, S=British Columbia, C=CA

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
5AB0D4FBB68E66252A764F6A8E02A8ED

File PE Metadata
Compilation timestamp:
1/31/2013 1:21:56 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:XxGHl/7Tol6LPnVNUPUxbf3OwcM8GNbAhekVCE4z5Q2ybFgufBKzxsX:gV7ToUzVyGbf3OKGeqH6KhRJKzxsX

Entry address:
0x113BC

Entry point:
55, 8B, EC, 83, C4, A4, 53, 56, 57, 33, C0, 89, 45, C4, 89, 45, C0, 89, 45, A4, 89, 45, D0, 89, 45, C8, 89, 45, CC, 89, 45, D4, 89, 45, D8, 89, 45, EC, B8, 2C, 00, 41, 00, E8, E8, 51, FF, FF, 33, C0, 55, 68, 9E, 1A, 41, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 5A, 1A, 41, 00, 64, FF, 32, 64, 89, 22, A1, 48, 5B, 41, 00, E8, 16, D8, FF, FF, E8, 65, D3, FF, FF, 80, 3D, DC, 2A, 41, 00, 00, 74, 0C, E8, 2B, D9, FF, FF, 33, C0, E8, 80, 32, FF, FF, 8D, 55, EC, 33, C0, E8, E2, A3, FF, FF, 8B, 55, EC, B8, 50, 86...
 
[+]

Entropy:
6.9490

Developed / compiled with:
Microsoft Visual C++

Code size:
65.5 KB (67,072 bytes)

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

http://files.free-browser.net/v2/click/3f1001e5/?d=http://au.free-browser.co/downloads/firefox/firefoxinstall_en_us.exe&key=a25eb59f1e0c158bb7b805a1aa431ce6bf8475009efacc99417f8f3697c66765&sid=FIREFOX&uid=1ANALYTICS563c7e668b2b8&affiliate_image=&product_image=http://au.free-browser.co/graphics/firefox/product_image_new_2015.png&n=Mozilla Firefox 2015&filename=firefox_install&done_url=http://free-browser.co/.../&cancel_url=http://free-browser.co/.../?error=1

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