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firefox_setup_stub.exe

Firefox

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_setup_stub.exe, “Firefox ” 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 by Download Assistant)

Product:
Firefox

Description:
Firefox

Version:
3.0.0.13

MD5:
a4716b61c9757a41c843184b12ca70ce

SHA-1:
23a022e030ddc8278491a34bdcb3ec93fe0b5eb9

SHA-256:
21799907613040273ca2fdba8145765eebd7d76f56649145ee529718ac36940f

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:
5/6/2024 4:33:17 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.3.13.11

File size:
867.8 KB (888,672 bytes)

Product version:
3.0.0.13

Copyright:
(c) Download Assistant

Original file name:
setup.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
English (United States)

Common path:
C:\users\{user}\downloads\firefox_setup_stub.exe

Digital Signature
Signed by:
Download Assistant

Authority:
VeriSign, Inc.

Valid from:
8/12/2014 6:00:00 PM

Valid to:
8/12/2016 5:59:59 PM

Subject:
CN=Download Assistant, O=Download Assistant, L=Victoria, S=British Columbia, C=CA

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
6BC405E8AC962C676F54816BCC4D4311

File PE Metadata
Compilation timestamp:
9/18/2014 4:10:09 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
24576:T/61EbipgiXMqz0HBSvwke4MLx1sKC+QuEAeK355o:T/61ECgiDzNvwkbOx1pQuED

Entry address:
0x49C7F

Entry point:
E8, 6E, 07, 01, 00, E9, 89, FE, FF, FF, CC, CC, CC, CC, CC, CC, CC, 8B, 54, 24, 0C, 8B, 4C, 24, 04, 85, D2, 74, 69, 33, C0, 8A, 44, 24, 08, 84, C0, 75, 16, 81, FA, 80, 00, 00, 00, 72, 0E, 83, 3D, 60, F4, 49, 00, 00, 74, 05, E9, D1, 07, 01, 00, 57, 8B, F9, 83, FA, 04, 72, 31, F7, D9, 83, E1, 03, 74, 0C, 2B, D1, 88, 07, 83, C7, 01, 83, E9, 01, 75, F6, 8B, C8, C1, E0, 08, 03, C1, 8B, C8, C1, E0, 10, 03, C1, 8B, CA, 83, E2, 03, C1, E9, 02, 74, 06, F3, AB, 85, D2, 74, 0A, 88, 07, 83, C7, 01, 83, EA, 01, 75, F6...
 
[+]

Entropy:
7.1977

Code size:
451 KB (461,824 bytes)

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

http://dl.downloadwizard.com/v2/click/612c09ad/?d=https://download-installer.cdn.mozilla.net/pub/firefox/releases/32.0.2/win32/en-US/Firefox Setup Stub 32.0.2.exe&key=92c04858a31bc07f69f8368277aaa127844017988e93adeb3f039b91087e1a5b&sid=firefox-ca&uid=&affiliate_image=&product_image=http://www.downloadwizard.com/.../logo_firefox_live.jpg&n=Firefox&filename=Firefox_Setup_Stub

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