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dropbox_setup.exe

ISfreemium

The file is a bundle distribution and utilizes the installCore download manager to distribute this potentially unwanted software. The application dropbox_setup.exe by ISfreemium has been detected as adware by 12 anti-malware scanners. The program is a setup application that uses the installCore installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. The installer is marketed through download protals and search ads as Dropbox but will also install additional software offers which include adware, PUPs and browser toolbars.
Publisher:
ISfreemium  (signed and verified)

MD5:
3dbed5b41f36360058d70d72a65ded2b

SHA-1:
4788a16daed47f7efc9de41521593137476f8990

SHA-256:
8f46b16c43ca838af29fbfed24e522bd3ee3aeacd6242637018cc8f7629debdb

Scanner detections:
12 / 68

Status:
Adware

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 an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
4/26/2024 9:12:30 PM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/InstallCore.Gen7
7.11.146.238

Comodo Security
Application.Win32.InstallCore.H
18209

Dr.Web
Trojan.Packed.24524
9.0.1.0123

ESET NOD32
Win32/InstallCore.HU
8.9753

F-Prot
W32/InstallCore.R3.gen
v6.4.7.1.166

K7 AntiVirus
Unwanted-Program
13.177.11965

Malwarebytes
PUP.Optional.Freemium.A
v2014.05.03.06

Reason Heuristics
PUP.Installer.ISfreemium.N
14.8.7.18

Rising Antivirus
PE:Malware.XPACK-LNR/Heur!1.5594
23.00.65.14501

Sophos
Install Core Click run software
4.98

Vba32 AntiVirus
Downware.InstallCore
3.12.26.0

VIPRE Antivirus
Adware.Win32.InstallCore.ba
28812

File size:
607.1 KB (621,640 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Common path:
C:\users\{user}\downloads_setup.exe

Digital Signature
Signed by:
ISfreemium

Authority:
COMODO CA Limited

Valid from:
7/3/2013 2:00:00 AM

Valid to:
7/4/2014 1:59:59 AM

Subject:
CN=ISfreemium, O=ISfreemium, STREET=63 Rothschild 63 BV, L=Tel-Aviv, S=N/A, PostalCode=65785, C=IL

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

Serial number:
009B517CAF08AA1A85822DB0CE5E9169FE

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:VPskOyMJfsGXSVle92lXK2iDErQg1PvrYLHHvJCeqI4IEHQhCbNSs0NyjJ15vhVV:VP9OyMJfstBlXK2QErQiviHvhSbN/hjJ

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...
 
[+]

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

Code size:
36 KB (36,864 bytes)

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

http://www.download4win.com/en/downloads/.../Dropbox_Setup.exe

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