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mkvtomp4_setup.exe

Rspark LLC

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The application mkvtomp4_setup.exe by Rspark has been detected as adware by 8 anti-malware scanners. The program is a setup application that uses the OutBrowse Revenyou installer. The setup routine uses the RevenYou.Com Pay Per Install platform (OutBrowse) which bundles additional software offers inclduing toolbars, extensions, PC utilities as well as other PUPs.
Publisher:
Rspark LLC  (signed and verified)

MD5:
08d7e582d2e6efca80ff862f5524f87e

SHA-1:
3ea131ded2dae64aa849a50b7c33f012cd52a629

SHA-256:
e8e1ef02da6f85ca63a9c6bc89be73341e107ac81b5871909c716f76fb6ac9a5

Scanner detections:
8 / 68

Status:
Adware

Explanation:
Bundles additional adware offers during download and installation using the OutBrowse installer.

Description:
This 'download manager' is also considered bundleware, a utility designed to download software (possibly legitimate or opensource) and bundle it with a number of optional offers including ad-supported utilities, toolbars, shopping comparison tools and browser extensions.

Analysis date:
5/5/2024 6:40:24 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.OutBrowse
7.1.1

Avira AntiVirus
APPL/Downloader.Gen
7.11.167.230

AVG
Generic
2015.0.3375

ESET NOD32
Win32/OutBrowse.AI (variant)
8.10278

Malwarebytes
PUP.Optional.Rspark
v2014.08.21.03

McAfee
Adware-OutBrowse
5600.7031

Reason Heuristics
PUP.Installer.Rspark.O
14.8.21.14

VIPRE Antivirus
OutBrowse
32348

File size:
619.8 KB (634,720 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
OutBrowse Revenyou (using Nullsoft Install System)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\mkvtomp4_setup.exe

Digital Signature
Signed by:
Rspark LLC

Authority:
COMODO CA Limited

Valid from:
2/11/2014 7:00:00 PM

Valid to:
2/12/2015 6:59:59 PM

Subject:
CN=Rspark LLC, O=Rspark LLC, STREET="2929 1st ave #405", L=Seattle, S=Washington, PostalCode=98121, C=US

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

Serial number:
00E4DA7826149424E5DF9F3646FF2E80B9

File PE Metadata
Compilation timestamp:
12/5/2009 5:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:DPXZpO1HiUIQ+owq2Sj2T07udsEU3VqFZvewwWgfc8vy4h0:DPXZA1HiFCsGu+Ee4FYwwA86T

Entry address:
0x30FA

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9803

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file mkvtomp4_setup.exe has been seen being distributed by the following URL.

http://software-files-a.cnet.com/s/software/13/80/80/.../mkvtomp4_setup.exe

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