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Dropbox.exe

WARP INSTALL

The software uses the Optimum Installer/Fusion Installer (Adknowledge) to download and install an offer stack of adware including toolbars, coupon extensions and various unwanted utilities. This installer is just a stub to present offers and download the expected software. The application Dropbox.exe, “Premium Installer ” by WARP INSTALL has been detected as adware by 11 anti-malware scanners. The program is a setup application that uses the Adknowledge Fusion installer. 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:
Premium Installer   (signed by WARP INSTALL)

Product:
Premium Installer

Description:
Premium Installer

Version:
1.3.7.2

MD5:
a7c108d9402f9ad708f1b7c494a263a3

SHA-1:
6e94a8465c7113c5947a9ffbb5ae17893a5db986

SHA-256:
6f66d8593b139db0dffeeebef06153c14b77a9cc80d62e63a3074eae71a93085

Scanner detections:
11 / 68

Status:
Adware

Explanation:
This setup/installer bundles various adware components (toolbars, shopping extensions, utility offers).

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:
4/24/2024 8:40:22 AM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
Adware/iBryte.A.17418
7.11.142.186

avast!
Win32:PUP-gen [PUP]
2014.9-140411

AVG
MalSign.Generic
2015.0.3508

ESET NOD32
Win32/AdWare.iBryte (variant)
8.9665

K7 AntiVirus
Unwanted-Program
13.176.11737

Kaspersky
not-a-virus:Downloader.Win32.Agent
14.0.0.4033

Malwarebytes
PUP.Optional.OptimumInstaller.A
v2014.04.11.11

Reason Heuristics
PUP.Installer.WARPINSTALL.H
14.4.11.8

Rising Antivirus
PE:Malware.Agent!6.1684
23.00.65.14409

Sophos
iBryte Optimum Installer
4.98

VIPRE Antivirus
Optimum Installer
28194

File size:
233.8 KB (239,392 bytes)

Product version:
1.3.7.2

Copyright:
Copyright (C) 2013 Premium Installer

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Adknowledge Fusion

Language:
English (United States)

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

Digital Signature
Signed by:
WARP INSTALL

Authority:
VeriSign, Inc.

Valid from:
10/3/2013 8:00:00 PM

Valid to:
9/20/2014 7:59:59 PM

Subject:
CN=WARP INSTALL, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=WARP INSTALL, L=Kansas City, S=Missouri, C=US

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:
52A35E3AC3B67E8CD7BB42D490658BBA

File PE Metadata
Compilation timestamp:
4/10/2014 5:00:15 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
3072:AtJ+T2VOPV0FT9qEIRyiGXWlkE9c4XROkkJi7EYdoEIWo+V5LgpcV:y+64V0FMEUyjsO4hO1ao+jgpcV

Entry address:
0xDC4C

Entry point:
E8, 0B, 48, 00, 00, E9, 78, FE, FF, FF, 8B, FF, 55, 8B, EC, 83, EC, 20, 8B, 45, 08, 56, 57, 6A, 08, 59, BE, AC, B2, 42, 00, 8D, 7D, E0, F3, A5, 89, 45, F8, 8B, 45, 0C, 5F, 89, 45, FC, 5E, 85, C0, 74, 0C, F6, 00, 08, 74, 07, C7, 45, F4, 00, 40, 99, 01, 8D, 45, F4, 50, FF, 75, F0, FF, 75, E4, FF, 75, E0, FF, 15, 60, B0, 42, 00, C9, C2, 08, 00, 8B, FF, 55, 8B, EC, 51, 53, 8B, 45, 0C, 83, C0, 0C, 89, 45, FC, 64, 8B, 1D, 00, 00, 00, 00, 8B, 03, 64, A3, 00, 00, 00, 00, 8B, 45, 08, 8B, 5D, 0C, 8B, 6D, FC, 8B, 63...
 
[+]

Entropy:
6.3831

Code size:
168 KB (172,032 bytes)

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

http://downlotrust.com/download.php?dfile=dropbox&sid=n9wv75bg_79_114729&cookie=bjl3djc1YmdfNzlfMTk1XzE5Nl8xMTQ3MjlfOA==

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