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firefox_setup.exe

The application firefox_setup.exe has been detected as a potentially unwanted program by 8 anti-malware scanners. The program is a setup application that uses the installCore installer, however the file is not signed with an authenticode signature from a trusted source. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. 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.
MD5:
4835fe47ccf4e5866d039e091a1859d2

SHA-1:
4250b5aecc3f88c8dca3d86898babe54bbe40a94

SHA-256:
0d3730dfcd1ede5e526d67bf68a99083c244f575b9507c6f50705193728f72a0

Scanner detections:
8 / 68

Status:
Potentially unwanted

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

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:
4/26/2024 2:00:16 PM UTC  (today)

Scan engine
Detection
Engine version

avast!
Win32:Adware-gen [Adw]
151028-1

AVG
Adware Generic5.BDFX
2015.0.4355

Dr.Web
Trojan.Crossrider1.49350
9.0.1.05190

ESET NOD32
Win32/InstallCore.BL potentially unwanted application
7.0.302.0

F-Prot
W32/InstallCore.R.gen
4.6.5.141

Reason Heuristics
PUP.InstallCore.Bundler (M)
16.1.13.13

Sophos
PUA 'Install Core'
5.20

VIPRE Antivirus
Threat.4786018
44962

File size:
603.1 KB (617,608 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

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

File PE Metadata
Compilation timestamp:
6/19/1992 6:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:WCyMJfsFJHCmVDYUGr3gHRV0k+Ts+MleJ3RddPbrwDUUfezUImxQK7:WCyMJfsHi0YLr3gA8le/PnwDr2zc

Entry address:
0x98CC

Entry point:
55, 8B, EC, 83, C4, CC, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, FA, 97, FF, FF, E8, 01, AA, FF, FF, E8, 2C, CC, FF, FF, E8, 73, CC, FF, FF, E8, 0A, F3, FF, FF, E8, 71, F4, FF, FF, 33, C0, 55, 68, 76, 9F, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 2C, 9F, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, B0, 40, 00, E8, 9B, FE, FF, FF, E8, 26, FA, FF, FF, 8D, 55, F0, 33, C0, E8, E0, D0, FF, FF, 8B, 55, F0, B8, D8, BD, 40, 00, E8, AB, 98, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, D8, BD, 40, 00, B2, 01, B8...
 
[+]

Entropy:
7.7584

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
36 KB (36,864 bytes)

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

http://downloader.ez-download.com/download.php?id=65c0fee9d122da246a8b965859994a415da86b32&z=0&p=eyJweSI6ImV6IiwicnMiOiJiaW5nIiwicnQiOiJzZWFyY2giLCJjIjoidXMiLCJvIjoid2luOCIsImIiOiJjaDI4IiwidV9pZCI6ImV6XzUxZjAwYWUzZDJjOTQzLjk0NzI3NDk3IiwicGFfaWQiOiIwIiwic3RfaWQiOiIwIiwic3BfaWQiOiIwMDA0LTAwMDAiLCJ0cyI6MTM3NDY4NTkyMywia3ciOiJtb3ppbGxhIGZpcmVmb3ggZm9yIiwiY3UiOiJtb3ppbGxhIGZpcmVmb3ggZm9yIiwiY2EiOm51bGx9

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