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skype_setup.exe

Optimum Installer

This adware bundler is distributed through Adknowledge's advertising supported software managers. The application skype_setup.exe, “Setup ” by Optimum Installer has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the Adknowledge Fusion installer. The file has been seen being downloaded from install.optimuminstaller.com.
Publisher:
OptimumInstaller  (signed by Optimum Installer)

Product:
OptimumInstaller

Description:
Setup

Version:
2.0.20

MD5:
a086bd45deed37a17a23e248121e7f8d

SHA-1:
47531570ec24c505a3d7d3134756ea952aa79755

SHA-256:
bf033899d2d6473fa29f0e07ecddcc9d1a32a59dd114b7f36beb01168cc95f40

Scanner detections:
1 / 68

Status:
Adware

Explanation:
This installer bundles various adware prorgams that may include toolbars and web browser advertising injectors/extensions.

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:
4/24/2024 1:33:11 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Adknowledge.OptimumInstaller.Installer (M)
15.12.29.16

File size:
579.3 KB (593,192 bytes)

Product version:
2.0.20

Original file name:
Setup.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Adknowledge Fusion

Language:
English (United States)

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

Digital Signature
Signed by:
Optimum Installer

Authority:
VeriSign, Inc.

Valid from:
10/10/2012 8:00:00 PM

Valid to:
11/7/2013 6:59:59 PM

Subject:
CN=Optimum Installer, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Optimum Installer, 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:
7C5F27B776ADBBB7943F700066A490BF

File PE Metadata
Compilation timestamp:
10/29/2012 12:02:13 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
12288:i7Q7ro1OdRR6ZV0neoIoSJi0qoRv3uex5/z1bpL6pWo:i7Q7JdmZV0necSJi0q2Puex571dLo

Entry address:
0x43F37

Entry point:
E8, BA, E8, 00, 00, E9, 78, FE, FF, FF, 8B, FF, 55, 8B, EC, 6A, 00, FF, 75, 14, FF, 75, 10, FF, 75, 0C, FF, 75, 08, E8, 33, E9, 00, 00, 83, C4, 14, 5D, C3, FF, 35, 9C, D5, 48, 00, E8, A4, 52, 00, 00, 59, 85, C0, 74, 02, FF, D0, 6A, 19, E8, FD, CD, 00, 00, 6A, 01, 6A, 00, E8, 32, EC, 00, 00, 83, C4, 0C, E9, 13, EB, 00, 00, 8B, FF, 55, 8B, EC, 8B, 55, 08, 53, 56, 57, 33, FF, 3B, D7, 74, 07, 8B, 5D, 0C, 3B, DF, 77, 1E, E8, 99, 03, 00, 00, 6A, 16, 5E, 89, 30, 57, 57, 57, 57, 57, E8, BD, CB, FF, FF, 83, C4, 14...
 
[+]

Entropy:
6.4190

Code size:
391 KB (400,384 bytes)

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

http://install.optimuminstaller.com/o/.../Skype_Setup.exe

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