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firefox_download.exe

Firefox Downloader

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_download.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:
Firefox Downloader

Version:
3.0.0.154

MD5:
85165fb383f6fa19e55dca921c62e72f

SHA-1:
fc07b4c2cd85bd64611778eced8688b32ae702db

SHA-256:
e4dee62cf0f88e49c81dee1593289cbd45cd7d3ab4a8ccda3d7e94a1edae5e6d

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:
11/28/2024 12:32:14 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.4.26.8

File size:
1.1 MB (1,142,552 bytes)

Product version:
3.0.0.154

Copyright:
(c) Download Assistant

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

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

Digital Signature
Signed by:
Download Assistant

Authority:
Symantec Corporation

Valid from:
4/13/2016 5:00:00 PM

Valid to:
7/14/2017 4:59:59 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:
3179370BECD0CB49DB3E6431A0C87799

File PE Metadata
Compilation timestamp:
1/30/2013 6:21:56 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:AxGfghnuKlluIub6wcekKoyIacNm1jqhkaOZnB5baDXPrYmHhKVdqjgEJakt:FI5ukuIcceHonNm1spAzbafrJ7gEJakt

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...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
65.5 KB (67,072 bytes)

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

http://files.free-browsers.co/1461189548MF5GcXp3cXlGci0/c3EmbyVGQ3JBdjg4NHwmT3xeVHxeVHIzITJ6M29ySnQ2c3NCcDYzITdzNkpxM3xeVHR3NnN0M0B8XlR0dzZzdDNASXcyNzhvenpJNDhJcDZKc0BzLnlzI0Fzcyg9K14/JT10cXNwbypxKCZwciYoJXJeKysmKXI9PXEldCkrK14/XigqcV5zK3EqcT8pXnE/.../JSkuOXdyQSVPYk9abWhXUWcoKyUrdHBvKHFwKG8oLm90dHd6d284c0l3MW91c0EuNDYzcjlxOEl3MW91c0EuMkFUdzZzdDNAIFIzITJ6M29yczYudHd6czJvMXNBdHc2c3QzQElyMyEyejNvcg==

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