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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:
46f725471a82d120abc3f4054617d471

SHA-1:
3d45ec96cd7c27ecd2a5fd82c2a2418cc5cc1353

SHA-256:
4d0918929fc3316dcdb1b047e2bd132ca07e834b1a1017c94477d127fe02590a

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 12:37:06 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.5.17.16

File size:
1.1 MB (1,138,808 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 7:00:00 PM

Valid to:
7/21/2017 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:
74E99F6D6E13850E699A1F96049E70BC

File PE Metadata
Compilation timestamp:
1/30/2013 8:21:56 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:fxGfyzROeNzbH0iMIyE7fpEG3UiSsJNSyqGbEJakX:oogeNsLhsEQesTEJakX

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:
6.9657

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/1462657144Mzk anNwanI bSEwIWltJjk Lmt8bzExdz0wSD05TT05TWt2NHVzdmhrQ215bGxfaXl2NHpseUNqdj05TW1weWxtdjU9OU1tcHlsbXY1QnB1ejFoc3NCbHVCMnpDbDVsP3JsNnwmbWkjQGkwXmkhayZeI0AmayVAOG0hOTkmIzltbEA5MCFsI2o4JWtAamhAI2wkaSRsISMjOSVoJUBoaUA5aiElP3pwa3xNUFlMTVZlQjkmOCM/MnBrfDhIVUhTZmFQSlpAJDlsIyYkIWk5JiNpP2htbXBzcGgxbEJwdGhubHw/d3l2azJqMUJwdGhubHw/.../bXBzbHVodGx8bXB5bG12NUJrdjR1c3Zoaw==

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