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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 9 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:
f4a9d2711a8b635c47045fba50d78c00

SHA-1:
29f0349e754eea0075c7d7b3d4bc2dd47c64d812

SHA-256:
7ebc3913166a1de9fb531a2e87cc252f0d171fead01d774b4dfbea6c765e9bbf

Scanner detections:
9 / 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 1:04:41 PM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/InstallCore.Gen7
7.11.178.6

Baidu Antivirus
Adware.Win32.InstallCore
4.0.3.141014

Dr.Web
Trojan.Packed.28933
9.0.1.0287

ESET NOD32
Win32/InstallCore.PL (variant)
8.10558

Fortinet FortiGate
Riskware/InstallCore
10/14/2014

McAfee
Artemis!F4A9D2711A8B
5600.6977

Reason Heuristics
PUP.GeryonAdsSL.P
14.10.14.13

Sophos
Generic PUA CJ
4.98

Vba32 AntiVirus
Malware-Cryptor.InstallCore.gen
3.12.26.3

File size:
755.3 KB (773,416 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Language:
Language Neutral

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 8:00:00 PM

Valid to:
6/16/2015 7:59:59 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 6:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:74vpcQJf7o7dn2lvs+3lhu2L7Sdka124faWUoOVY4gcXvJWLu9LzTb8X8:74v+YkAO+juo7e1DDOVY4VfJuu9LT7

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...
 
[+]

Entropy:
7.8892

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/.../skype2014.php

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