gameosetup.exe

Best Free Downloads

The file is a bundle distribution and utilizes the installCore download manager to distribute this potentially unwanted software. The application gameosetup.exe by Best Free Downloads has been detected as adware by 22 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 www.bestusefuldownloads.com.
Publisher:
Best Free Downloads  (signed and verified)

MD5:
708c3e91e2d5f234a7d51ae0003d7856

SHA-1:
85573a9e00122dc25a2eb78bd98a24f98eaa1769

SHA-256:
b414da92d46cf480e1c6875937c4a6c650ac0e9d4ad72dd79df629267623b8fb

Scanner detections:
22 / 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:
4/18/2024 5:04:30 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Trojan.Heur2.GZ.SGZ@bmIbNQfi
825

Agnitum Outpost
Trojan.MulDrop
7.1.1

Avira AntiVirus
7.11.144.200

AVG
MalSign.Generic
2015.0.3303

Bitdefender
Gen:Trojan.Heur2.GZ.SGZ@bmIbNQfi
1.0.20.1525

Clam AntiVirus
Win.Trojan.Heur2-188
0.98/19485

Comodo Security
Application.Win32.Intallcore.BFD
18151

Dr.Web
Trojan.MulDrop5.10078
9.0.1.05190

Emsisoft Anti-Malware
Gen:Trojan.Heur2.GZ.SGZ@bmIbNQfi
8.14.11.01.06

ESET NOD32
Win32/InstallCore.BY potentially unwanted application
7.0.302.0

F-Prot
W32/A-5eac699d
v6.4.7.1.166

F-Secure
Gen:Trojan.Heur2.GZ.SGZ@bmIbNQfi
11.2014-01-11_7

G Data
Gen:Trojan.Heur2.GZ.SGZ@bmIbNQfi
14.11.24

IKARUS anti.virus
Trojan.Win32.Spy2
t3scan.1.6.1.0

K7 AntiVirus
Unwanted-Program
13.183.13619

Malwarebytes
PUP.Optional.BestFree
v2014.11.01.06

MicroWorld eScan
Gen:Trojan.Heur2.GZ.SGZ@bmIbNQfi
15.0.0.915

NANO AntiVirus
Riskware.Win32.InstallCore.dcnbhc
0.28.2.62483

Reason Heuristics
PUP.Installer.BestFreeDownloads.K
14.11.1.18

Vba32 AntiVirus
3.12.26.0

VIPRE Antivirus
Trojan.Win32.Generic
28516

File size:
717.2 KB (734,448 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

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

Digital Signature
Authority:
COMODO CA Limited

Valid from:
10/20/2013 8:00:00 PM

Valid to:
10/21/2014 7:59:59 PM

Subject:
CN=Best Free Downloads, O=Best Free Downloads, STREET=Lilienblum 28, L=Tel Aviv, S=Israel, PostalCode=6513307, C=IL

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
046CC4AA2B722C5117786BD75A823929

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:Fnvp5fgTUK7xVBml4FHhuNDEJx3AN+YbvzLSHHU4uGYdR5x4G8Mwy2ezR:FnvXfK7i4B8NDEJxrYTCHQ/CG8Mw1e

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:
7.8597

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

Code size:
37 KB (37,888 bytes)

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

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