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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. The installer is marketed through download protals and search ads as the free Mozilla Firefox web browser but will also install additional software offers which include adware, PUPs and browser toolbars.
Publisher:
Download Assistant  (signed and verified)

Product:
Mozilla Firefox 2015

Version:
3.0.0.105

MD5:
82621bccefd21d10ee27379ed3c82998

SHA-1:
28e758c3a84b5f53d20b1ca01bb0bcc92b02c72d

SHA-256:
7c9e2bdc49b51da659ce9a5262c5f2765706d6a885647bd5de317aa4b4bab264

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 an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
11/28/2024 12:22:04 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.DownloadAssistant.Bundler (M)
16.3.8.8

File size:
960.5 KB (983,544 bytes)

Product version:
3.0.0.105

Copyright:
(c) Download Assistant

Original file name:
firefox_install.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
English (United States)

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:
6/10/2015 8:00:00 PM

Valid to:
6/10/2016 7:59:59 PM

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:
04A0CF6AE167D0090DFCD45981346775

File PE Metadata
Compilation timestamp:
6/16/2015 8:20:11 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
24576:RibFk3EUdhQpEUW+MDKUqN8zzXMSCws+2c7SE58NujAZ7+8:0b+NQ+U4DKizzXhbsT9ujAB+8

Entry address:
0x1288

Entry point:
55, 8B, EC, 83, EC, 14, 53, 56, 57, 6A, 00, FF, 15, 08, 10, 49, 00, 8B, F8, 33, D2, 8B, CF, 8B, 5F, 3C, 03, DF, 89, 5D, FC, 0F, B7, 73, 14, 83, C6, 18, 03, F3, 2B, 05, 1C, 10, 40, 00, 89, 45, F0, 1B, D2, 89, 75, EC, F7, D8, 89, 55, F4, 83, D2, 00, F7, DA, 52, 8B, 93, A0, 00, 00, 00, 50, 8B, 46, 0C, 03, 05, 28, 10, 40, 00, 50, FF, B3, A4, 00, 00, 00, E8, C6, FD, FF, FF, 56, FF, 35, 28, 10, 40, 00, 8B, CF, E8, 42, FF, FF, FF, A1, 20, 10, 40, 00, 83, C4, 18, 83, C6, 28, 83, F8, 01, 76, 18, 56, FF, 35, 2C, 10...
 
[+]

Entropy:
7.0509

Developed / compiled with:
Microsoft Visual C++

Code size:
574 KB (587,777 bytes)

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

http://download.free-browsers.co/v2/click/738d0ce7/?d=http://au.free-browser.co/downloads/.../firefoxinstall_en_us.exe&key=a25eb59f1e0c158bb7b805a1aa431ce6bf8475009efacc99417f8f3697c66765&sid=FIREFOX&uid=1ANALYTICS5580bd367ed47&affiliate_image=&product_image=http://au.free-browser.co/graphics/.../product_image_new_2015.png&n=Mozilla Firefox 2015&filename=firefox_install

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