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skype_installer.exe

Geryon Ads S.L.

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application skype_installer.exe by Geryon Ads S.L has been detected as adware by 6 anti-malware scanners. The program is a setup application that uses the installCore installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. The file has been seen being downloaded from downloadpcapps.com and multiple other hosts.
Publisher:
Geryon Ads S.L.  (signed and verified)

MD5:
90b7c160a03e208ed26379390e7fe1e4

SHA-1:
7ea76942ab09335b3c6271cd6e81b450ec956a77

SHA-256:
18ba696d79169b5d97b54849fea0bec5f13c6ee9ec9a343ca4fce00521e5f09b

Scanner detections:
6 / 68

Status:
Adware

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

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:
12/26/2024 1:36:26 PM UTC  (today)

Scan engine
Detection
Engine version

Baidu Antivirus
Adware.Win32.InstallCore
4.0.3.14911

Dr.Web
Trojan.MulDrop5.38104
9.0.1.0254

ESET NOD32
Win32/InstallCore.QL (variant)
8.10321

Fortinet FortiGate
Riskware/InstallCore
9/11/2014

McAfee
Artemis!F55B7494E455
5600.7011

Reason Heuristics
PUP.GeryonAdsSL.P
14.9.30.13

File size:
758.8 KB (777,008 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

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

Digital Signature
Signed by:
Geryon Ads S.L.

Authority:
Thawte, Inc.

Valid from:
6/16/2014 2:00:00 AM

Valid to:
6/17/2015 1:59:59 AM

Subject:
CN=Geryon Ads S.L., OU=IT, O=Geryon Ads S.L., L=Barcelona, S=Barcelona, C=ES

Issuer:
CN=Thawte Code Signing CA - G2, O="Thawte, Inc.", C=US

Serial number:
71F910550D2DD2713679787B12FF2EA0

File PE Metadata
Compilation timestamp:
6/20/1992 12:22:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:bUvpQwD37AkEYceKxYJIMrtq6ZDc5V5MsEzZr5LiwlOk2CCL8bUb8XK:bUv+wDUkEY/6Mro8Dc5V5MsEzzAzHL80

Entry address:
0x9C40

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, 86, 94, FF, FF, E8, 8D, A6, FF, FF, E8, 1C, A9, FF, FF, E8, 53, C9, FF, FF, E8, 9A, C9, FF, FF, E8, C9, F2, FF, FF, E8, 30, F4, FF, FF, 33, C0, 55, 68, FC, A2, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, C5, A2, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 96, FE, FF, FF, E8, C9, FA, FF, FF, 8D, 55, F0, 33, C0, E8, 83, CF, FF, FF, 8B, 55, F0, B8, 24, CE, 40, 00, E8, 32, 95, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, 24, CE...
 
[+]

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
37 KB (37,888 bytes)

The file skype_installer.exe has been seen being distributed by the following 2 URLs.

http://downloadpcapps.com/downloader/.../download_skype.php

http://softwareforfree.net/.../skype.php

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