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firefox.exe

FITDownloader

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application firefox.exe by FITDownloader 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 installCore 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:
FITDownloader  (signed and verified)

MD5:
1eb83f4a0f168905cc46f27b164d4ff4

SHA-1:
78e0b67aa4f6464c601402f4a2858f722b6aa6a6

SHA-256:
676257fa446e49343298009e97a4b3543758588b0cd43bdf2b5b01553d128655

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:
6/18/2025 1:23:43 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore (M)
16.8.2.7

File size:
738.6 KB (756,376 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

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

Digital Signature
Signed by:
FITDownloader

Authority:
COMODO CA Limited

Valid from:
4/28/2014 2:00:00 AM

Valid to:
4/29/2015 1:59:59 AM

Subject:
CN=FITDownloader, O=FITDownloader, STREET=28 Lenelblome St., L=Tel-Aviv, S=Israel, PostalCode=651307, C=IL

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
5E0816C139E8D20E76830D3D9638C4FE

File PE Metadata
Compilation timestamp:
6/20/1992 12:22:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:gSFaPUmGpLVeaKy9mDHxBMbLdiO2KrD1fQDjXXSRbLXjpe57ijcw+ye4fiaLqt+S:gSFOZGpLVesWLMbhZlfCXS9Je5iww83j

Entry address:
0x9C40

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, 86, 94, FF, FF, E8, 8D, A6, FF, FF, E8, 1C, A9, FF, FF, E8, BF, A9, FF, FF, E8, 5E, C9, FF, FF, E8, C9, F2, FF, FF, E8, 30, F4, FF, FF, 33, C0, 55, 68, FC, A2, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, C5, A2, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 96, FE, FF, FF, E8, C9, FA, FF, FF, 8D, 55, F0, 33, C0, E8, 83, CF, FF, FF, 8B, 55, F0, B8, 24, CE, 40, 00, E8, 32, 95, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, 24, CE...
 
[+]

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

Code size:
37 KB (37,888 bytes)

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

http://inndl.com/download.php?version=010914&domain=firefox&name=Mozilla Firefox&icon=aHR0cDovL3pkamVjaWEucGwuc2Z0Y2RuLm5ldC9wbC9zY3JuLzEwNzAwMC8xMDcxOTEvbW96aWxsYS1maXJlZm94LTEwLTMyeDMyLnBuZw==&ss=http://zdjecia.pl.sftcdn.net/pl/scrn/107000/107191/mozilla-firefox-5-40.png?key=api&url=aHR0cDovL2ZpcmVmb3guc29mdG9uaWMuaXQvZG93bmxvYWQ=&os=&lang=pl_PL&desc=UHJvZ3JhbSB1bW/FvGxpd2lhasSFY3kgcHJ6ZWdsxIVkYW5pZSBzdHJvbiBpbnRlcm5ldG93eWNoIGRhasSFY3kgd2llbGUgbW/.../Fm2Np&gclid=1

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