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skype_downloader_by_skype.exe

Somoto Ltd.

Somoto uses a monetization platform known as the 'Better Installer' to provide the ability of 3rd party developers to bundle various adware packages through an affiliate pay-per-install program. The application skype_downloader_by_skype.exe, “Powered by BetterInstaller” by Somoto has been detected as adware by 12 anti-malware scanners. The program is a setup application that uses the Somoto BetterInstaller installer. Includes the Somoto BetterInstaller, an adware installer that will bundle offers for additional third party applications, mostly adware toolbars, with legitimate softare and may be installed without adequate user consent.
Publisher:
Somoto Ltd.  (signed and verified)

Description:
Powered by BetterInstaller

Version:
2.1.0.0

MD5:
c56d37b3039fa16ea686e31eda38215a

SHA-1:
eb8157ee4c863a2d49f9dec18cce7afca2c3e7d0

SHA-256:
c0ca59303378736f99e62c6863df9b0e7656b2c9c5e0039c56d83860de4f7ebd

Scanner detections:
12 / 68

Status:
Adware

Explanation:
Uses the Somoto 'BetterInstaller' to bundle additional (unwanted) software during install without adequate consent.

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:
4/27/2024 2:08:03 AM UTC  (today)

Scan engine
Detection
Engine version

avast!
Win32:Somoto-F [PUP]
2014.9-140130

AVG
BTInternet.G
2015.0.3578

Clam AntiVirus
Adware.Somoto-1
0.98/18155

Dr.Web
Adware.Somoto.8
9.0.1.030

Emsisoft Anti-Malware
Riskware.Win32.Somoto.AMN
8.14.01.30.05

ESET NOD32
Win32/Somoto (variant)
8.8398

F-Prot
W32/SomotoBetterInstaller.A
v6.4.7.1.166

Reason Heuristics
PUP.BetterInstaller.Somoto.Z
14.8.7.17

Sophos
Somoto BetterInstaller
4.89

SUPERAntiSpyware
Adware.Somoto
10814

Trend Micro House Call
TROJ_GEN.F47V0328
7.2.30

VIPRE Antivirus
Trojan.Win32.Generic
18302

File size:
159.4 KB (163,176 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Somoto BetterInstaller

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\skype_downloader_by_skype.exe

Digital Signature
Signed by:
Somoto Ltd.

Authority:
COMODO CA Limited

Valid from:
9/20/2011 12:00:00 AM

Valid to:
9/19/2014 11:59:59 PM

Subject:
CN=Somoto Ltd., O=Somoto Ltd., STREET=PO Box 58096, L=Tel Aviv, S=--, PostalCode=61580, C=IL

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

Serial number:
00841D099D16B738F34172FEEFE1D2574F

File PE Metadata
Compilation timestamp:
12/17/2010 9:14:12 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.56

CTPH (ssdeep):
3072:v22ihA0m3BJf0AyrRrQms4JXeu2KUiqAEQxUY59MkJQEVvH7wB3q:gA0m3T0Ayr5Qxh/KUiqAEQxR5bTVv0

Entry address:
0x39AC

Entry point:
55, 89, E5, 57, 56, 53, 81, EC, 7C, 01, 00, 00, E8, 97, 46, 00, 00, 83, EC, 0C, 68, 01, 80, 00, 00, E8, 42, 43, 00, 00, 6A, 00, E8, AB, 46, 00, 00, 6A, 08, A3, 88, 4C, 42, 00, E8, B1, 28, 00, 00, 6A, 00, 68, 60, 01, 00, 00, A3, 38, 4D, 42, 00, 8D, 85, 90, FE, FF, FF, 50, 6A, 00, 68, A4, A2, 40, 00, E8, F0, 45, 00, 00, 83, EC, 0C, 68, A5, A2, 40, 00, 68, 68, 4D, 42, 00, E8, EF, 2A, 00, 00, 83, C4, 18, E8, FE, 42, 00, 00, 52, 52, 50, 68, 00, D0, 42, 00, E8, DA, 2A, 00, 00, 57, 6A, 00, E8, 39, 42, 00, 00, 83...
 
[+]

Code size:
28.5 KB (29,184 bytes)

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

http://downloadcdn.betterinstaller.com/installers/2/.../Skype_downloader_by_Skype.exe

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