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efinstaller.exe

UpdateStar GmbH

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application efinstaller.exe by UpdateStar GmbH has been detected as a potentially unwanted program by 16 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. While running, it connects to the Internet address www.updatestar.com on port 80 using the HTTP protocol.
Publisher:
UpdateStar GmbH  (signed and verified)

MD5:
13c45953f6c3df6e9fb6d795d4631f47

SHA-1:
23a47dddbd08accd9355a60ef04bb700b07064c8

SHA-256:
afa7ee59aced5c11882525cc92f9d8de63778eea824dc8bf715917d23a35964c

Scanner detections:
16 / 68

Status:
Potentially unwanted

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:
5/10/2024 6:22:32 AM UTC  (today)

Scan engine
Detection
Engine version

avast!
Malware-gen
150602-1

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Installcore-504
0.98/20547

Comodo Security
Application.Win32.Installcore.OF
22322

Dr.Web
Trojan.Packed.25266
9.0.1.05190

ESET NOD32
Win32/InstallCore.OF potentially unwanted application
7.0.302.0

F-Prot
W32/A-6c5f2e7b
v6.4.7.1.166

G Data
Win32.Application.InstallCore.CZ
15.6.25

K7 AntiVirus
Unwanted-Program
13.204.16124

Malwarebytes
PUP.Optional.InstallCore
v2015.06.03.02

McAfee
Program.CryptInno
18.0.204.0

NANO AntiVirus
Riskware.Win32.InstallCore.ddoubi
0.30.24.1636

Reason Heuristics
PUP.Installer.UpdateStarGmbH
15.6.3.14

Sophos
PUA 'Install Core Click run software'
5.15

Vba32 AntiVirus
Downware.InstallCore
3.12.26.4

VIPRE Antivirus
Threat.4150696
40786

File size:
625.8 KB (640,792 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Digital Signature
Signed by:
UpdateStar GmbH

Authority:
COMODO CA Limited

Valid from:
1/2/2013 1:00:00 AM

Valid to:
1/3/2016 12:59:59 AM

Subject:
CN=UpdateStar GmbH, O=UpdateStar GmbH, STREET=Hauptstraße 20, L=Berlin, S=Berlin, PostalCode=10827, C=DE

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

Serial number:
009ED227324380B40DDE36C8D31A33831F

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:N9ApoBvMiFTqCyyuyus8UhQdU0kDtqBWc/eHc9KG4TdTvgeBis:N9AafTqCnVu0hQdn8KnKG4JTYeBis

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 executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to www.updatestar.com  (5.35.253.150:80)

TCP (HTTP):
Connects to ec2-54-186-29-120.us-west-2.compute.amazonaws.com  (54.186.29.120:80)

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