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skype.exe

TRUSTEd download tyy

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 TRUSTEd download tyy has been detected as adware by 7 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:
TRUSTEd download tyy  (signed and verified)

MD5:
146ea956c5677fe583707d22fdb95a49

SHA-1:
b6b21cf4b71f626254b42feb6970cbaecc3f4a49

SHA-256:
8a346515dfa3f128068500b729d8d7ed129330d2add840dda2eed9d2872c1698

Scanner detections:
7 / 68

Status:
Adware

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

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:
5/8/2024 6:29:12 AM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/Adware.Gen7
7.11.217.232

ESET NOD32
Win32/OutBrowse.BU potentially unwanted application
7.0.302.0

Malwarebytes
PUP.Optional.OutBrowse
v2015.03.17.02

McAfee
Adware-OutBrowse.e
5600.6824

NANO AntiVirus
Trojan.Win32.Generic.dorbni
0.30.0.296

Reason Heuristics
PUP.Bundler.Outbrowse
15.3.17.1

Vba32 AntiVirus
Adware.Outbrowse
3.12.26.3

File size:
623.5 KB (638,512 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:
TRUSTEd download tyy

Authority:
thawte, Inc.

Valid from:
3/7/2015 7:00:00 PM

Valid to:
1/27/2016 6:59:59 PM

Subject:
CN=TRUSTEd download tyy, O=TRUSTEd download tyy, L=Dublin, S=Dublin, C=IE

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
629FF6FCB11CAAA5C52EF71432AB5E28

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:tdZ8CD1Tb2cqF9G2Se8uGtHlbPvpLTtmo+gNQ/fVgZPhtmc:tdZbZucqF9G258FHhhPtv+gNYf

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:
7.9492

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 3 URLs.

http://get.sad1209.info/1426556358/1426556358/get64?p=1955&d=1782&l=1701&n=1&productname=Skype&d1=177013&d2=647&exeurl=http://download.skype.com/msi/SkypeSetup_6.18.0.106.msi&filename=Skype&dynamicname=Skype&tyurl=http://www.postdownload.net/.../redirect.php?id=qvqbchtb82rgfb52vld5ustb2r3thio1prt0i37ie35s2md2m270-71674434c6a250afd26463b824414aff&d=downloadease.net&p=Skype&pid=3&countryid=265&icon=1

http://get2.up1208.info/1426556351/get?p=1955&d=1782&l=1701&n=1&productname=Skype&d1=177013&d2=647&exeurl=http://download.skype.com/msi/SkypeSetup_6.18.0.106.msi&filename=Skype&dynamicname=Skype&tyurl=http://www.postdownload.net/.../redirect.php?id=qvqbchtb82rgfb52vld5ustb2r3thio1prt0i37ie35s2md2m270-71674434c6a250afd26463b824414aff&d=downloadease.net&p=Skype&pid=3&countryid=265

http://download.downloadease.net/download/716/.../

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