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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 3 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 softwareforfree.net.
Publisher:
Geryon Ads S.L.  (signed and verified)

MD5:
0618f4826e78cd7fb852d9ca031884ac

SHA-1:
2bfbbcec784874fe316b5f9e6de4c7c4b7d55c40

SHA-256:
62f4a01e90f63cf4a764a5ba4fc9f46e331dcab0a7222bf9c74883f21331026d

Scanner detections:
3 / 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 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:
12/26/2024 1:12:51 PM UTC  (today)

Scan engine
Detection
Engine version

Baidu Antivirus
Adware.Win32.InstallCore
4.0.3.14926

ESET NOD32
Win32/InstallCore.QL (variant)
8.10464

Reason Heuristics
PUP.GeryonAdsSL.P
14.9.30.13

File size:
753.4 KB (771,432 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:
6/15/2014 5:00:00 PM

Valid to:
6/16/2015 4:59:59 PM

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:
6/19/1992 3:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:kAvpqqSB0N+omq9LmHBUde29y08XVouGLybnwaX9SXspwxACPAdEhKWqxZGdilFx:kAvwRo7hmHidA08lVGG9SXsWAldaKTZH

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 URL.

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

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