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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:
a70656f5a35e8159990a304d9bddbbb0

SHA-1:
4427f16cd89281e0704f367b5f6f6e4f79d2425b

SHA-256:
34ed2d2fa7655c72ad12da94e459ae369b79e04e14b69445416ef663627d30c4

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 12:49:51 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.4.21.20

File size:
1.1 MB (1,134,128 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:
4/5/2016 7:00:00 PM

Valid to:
7/6/2017 6:59:59 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:
3F4D313EECE411E33755867DDBC09D69

File PE Metadata
Compilation timestamp:
1/30/2013 9:21:56 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:DxGfMv4iK40U9IbSfgtn6GCr0t8VqYO07F8scnzZfnHRL6EJakt:c5if9rgt8AYObT+EJakt

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/1460421945OCREb3h1b3dEcCs9cW8lbSNEQXA dDY2Mi8lTS8kUi8kUnAxOXp4MW1wSHI0cXEgbjQxOTVxNEhvMS8kUnJ1NHFyMTAvJFJydTRxcjEwR3V6NTZteHhHcXpHNzVIcTBxfHdxIT49cm4qJm4lK25ecD0rKiY9cCkmI3JeJCQ9KiRycSYkJV5xKm8jKXAmb20mKnEobihxXioqJCltKSZtbiYkb14pfDV1cD5SVWRRUmFqRyQ9IyZ8N3VwPiNNWk1Ya2ZVT2UmKD1vXiYlKG0mbiMmfG1ycnV4dW02cUd1eW1zcT58MjQxcDdvNkd1eW1zcT58ej5SdTRxcjEwPFAxOXp4MW1wcTR8cnV4cXpteXE cnU0cXIxMEdwMTl6eDFtcA==

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