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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:
29d470e52ac35b2f78bfdf6f057629bd

SHA-1:
c611cdea6a2af3f1ec738ab899fbafde88d2bffd

SHA-256:
13e55b5d51f0415a4c54a36f8f9dd78a00ff6c7f80ccb3ae0b45d83d12660035

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 12:43:38 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.5.27.17

File size:
1.1 MB (1,142,976 bytes)

Product version:
3.0.0.154

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\temporary internet files\content.ie5\{random}\firefox_download.exe

Digital Signature
Signed by:
Download Assistant

Authority:
Symantec Corporation

Valid from:
4/20/2016 6:00:00 PM

Valid to:
7/21/2017 5:59:59 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:
74E99F6D6E13850E699A1F96049E70BC

File PE Metadata
Compilation timestamp:
1/30/2013 7:21:56 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:zxGfmwV13nxuBn8sN3yBIc9OvbrGJuvOViSkpDdf1O5/RaMbzymBrjwcEJako:sGBnJNhbGM0Z8df1O5AMbzvTEJako

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:
6.9717

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://download.free-browsers.info/1462345618P19UNSQhNSNUOCwuLDQ4Q19UUTZPMD09KkguY0hfaEhfaDYmOl4kJjM2WDgpNzdQNCkmOis3KVg1JkhfaDghKTc4JjtIX2g4ISk3OCY7VyFeKz0zJCRXN15XLStYNzs3SiM3L09DODQ PDQuQjQsNkNCPjxDNkE8fDgsX19DPl84NzxfLiw3PjV8QTY8NTM8PjcgNCA3LD4 X0EzQTwzNDxfNSxBSishNk9oa3RnaHF6V19DfD5KLSE2T3xjcGNuMXZrZXU8IF9CQjggIDw8PjU2SjM4OCEkITM9N1chJTM5N09KKikmNi01PVchJTM5N09KXk9oISk3OCY7TmYmOl4kJjM2NylKOCEkN14zJTdPOCEpNzgmO1c2JjpeJCYzNg==

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