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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 12 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 and multiple other hosts.
Publisher:
Geryon Ads S.L.  (signed and verified)

MD5:
0418c1b1bcb5c0a103cf522769ffada0

SHA-1:
1817a2ec71a27a8eab6df60a2ca0152e2d85e73a

SHA-256:
ab5fd1b5a8ec56c9d0cebcf634396f84d0d4c70e1a94efccc8dfd29794c07fd6

Scanner detections:
12 / 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 1:09:55 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.InstallCore
7.1.1

Avira AntiVirus
Adware/InstallCore.A.231
7.11.182.198

AVG
Generic
2015.0.3294

Baidu Antivirus
Adware.Win32.InstallCore
4.0.3.141111

Comodo Security
ApplicUnwnt
19976

ESET NOD32
Win32/InstallCore.RD (variant)
8.10660

Fortinet FortiGate
Riskware/InstallCore
11/11/2014

G Data
Win32.Application.Agent.NRI3ML
14.11.24

McAfee
Artemis!0418C1B1BCB5
5600.6950

Qihoo 360 Security
Win32/Virus.Adware.e88
1.0.0.1015

Reason Heuristics
PUP.GeryonAdsSL.P
14.11.11.3

VIPRE Antivirus
InstallCore
34470

File size:
781.7 KB (800,504 bytes)

Product version:
1.5

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):
24576:jMMFIEIUlA9ff4/1rkh2/WJA070sY5Khc0ADzQE:jMmT9lAVQ/BkhE2A0gv5Khc0Ab

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, BF, A9, FF, FF, E8, 5E, 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:
7.8900

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://softwareforfree.net/.../skype2014.php

http://softwaredll.info/downloader/.../download_skwin2014.php

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