4dd7fe35_stp.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 4dd7fe35_stp.exe by UpdateStar GmbH has been detected as a potentially unwanted program by 4 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. It is also typically executed from the user's temporary directory. The file has been seen being downloaded from client.updatestar.com and multiple other hosts.
Publisher:
UpdateStar GmbH  (signed and verified)

MD5:
6cd05d16a4de6424c3a7760861870942

SHA-1:
8c67085ccdce477f0e384ed35495f125286a7556

SHA-256:
7b842876c8b9d662c71751674063c976ba2787000b136c01937de09c85a212b1

Scanner detections:
4 / 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 '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:
3/6/2021 1:03:13 AM UTC  (today)

Scan engine
Detection
Engine version

Baidu Antivirus
Adware.Win32.InstallCore
4.0.3.1584

Bkav FE
W32.HfsAdware
1.3.0.6979

Dr.Web
Adware.Downware.2085
9.0.1.0216

Reason Heuristics
PUP.UpdateStarGmbH.Installer (M)
15.8.4.16

File size:
142.5 KB (145,880 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Nullsoft Install System)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\4dd7fe35_stp.exe

Digital Signature
Signed by:

Authority:
COMODO CA Limited

Valid from:
1/2/2013 7:00:00 AM

Valid to:
1/3/2016 6:59:59 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:
2/25/2012 2:19:59 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
3072:zweqOYEUXPnt45ndbPTrXRR5fAlWjPKkJ8fWwER42WuxQpr:8EUXVMdrT35i5dEamxg

Entry address:
0x39E3

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 91, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B8, 80, 40, 00, 55, FF, 15, C0, 82, 40, 00, 6A, 08, A3, B8, 2E, 47, 00, E8, 37, 2A, 00, 00, 55, 68, B4, 02, 00, 00, A3, D0, 2D, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 1C, 93, 40, 00, FF, 15, 84, 81, 40, 00, 68, 04, 93, 40, 00, 68, C0, AD, 46, 00, E8, 19, 27, 00, 00, FF, 15, B4, 80, 40, 00, 50, BF, A0, 30, 4C, 00, 57, E8, 07, 27, 00, 00...
 
[+]

Entropy:
7.4672

Packer / compiler:
Nullsoft install system v2.x

Code size:
28 KB (28,672 bytes)

The file 4dd7fe35_stp.exe has been seen being distributed by the following 2 URLs.

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