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skype.exe

OUTBROWSE

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The application skype.exe by OUTBROWSE has been detected as adware by 13 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. The file has been seen being downloaded from get.download2desktop.com and multiple other hosts.
Publisher:
OUTBROWSE  (signed and verified)

MD5:
a1a3f67e1bf21035f6da975b8d9f1040

SHA-1:
83cb534c027d8ad596d4deee2c80634c74012538

SHA-256:
d717d976f934906cd551a902e045ee298681bc8939d4444e77755dec83a4362b

Scanner detections:
13 / 68

Status:
Adware

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

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:
11/24/2024 2:59:13 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.OutBrowse
7.1.1

AVG
Generic
2015.0.3335

Dr.Web
Adware.Downware.2081
9.0.1.05190

ESET NOD32
Win32/OutBrowse.AU
8.10488

G Data
Win32.Application.Outbrowse
14.9.24

IKARUS anti.virus
PUA.OutBrowse
t3scan.1.7.8.0

K7 AntiVirus
Unwanted-Program
13.183.13535

Kaspersky
not-a-virus:AdWare.Win32.OutBrowse
15.0.0.494

Malwarebytes
PUP.Optional.OutBrowse
v2014.09.30.12

McAfee
Adware-OutBrowse.a
5600.6991

Reason Heuristics
PUP.OUTBROWSE.F
14.9.30.11

Sophos
OutBrowse Revenyou
4.98

VIPRE Antivirus
Threat.4784459
33120

File size:
557.1 KB (570,504 bytes)

File type:
Executable application (Win32 EXE)

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

Language:
Language Neutral

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

Digital Signature
Signed by:
OUTBROWSE

Authority:
COMODO CA Limited

Valid from:
4/6/2014 8:00:00 PM

Valid to:
4/7/2015 7:59:59 PM

Subject:
CN=OUTBROWSE, O=OUTBROWSE, STREET=Bialik Number: 143, L=Ramat Gan, S=Israel, PostalCode=5252337, C=IL

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

Serial number:
00A5F03C3A375C11FD6C1C160EE8BFF923

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):
6144:de34sfutkqzFSRgPfapgsoWpcHKzUs8wKIrXt/RtZAC7AFq6VdXAS7U44z993i9E:I2TFZfaSsoZhXQ5RthUFq6DF7/e99M

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...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file skype.exe has been seen being distributed by the following 4 URLs.

http://get.download2desktop.com/DownloadManager/Get?downloadtime=1411772962&p=10096&d=14176&l=13577&n=1&productname=WinInstallDownloadManager&exeurl=http://download.skype.com/.../SkypeSetup.exe&dynamicname=Skype&filename=skype&d1=1

http://get.downloaddesktop3.info/DownloadManager/Get?p=10096&d=14176&l=13577&n=1&productname=WinInstallDownloadManager&exeurl=http://download.skype.com/.../SkypeSetup.exe&dynamicname=Skype&filename=skype&d1=1

http://dl.exfilesdesk.com/n/3.1.22.9/.../Skype.exe

http://www.download366.net/skype/download/.../913

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