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dmaster.exe

Evgen Kugitko

The is the installer for the WebPick InstalleRex download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed without consent. The application dmaster.exe by Evgen Kugitko has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the WebPick InstalleRex installer. The file has been seen being downloaded from ec2-54-88-185-190.compute-1.amazonaws.com. While running, it connects to the Internet address r1.stylezip.info on port 80 using the HTTP protocol.
Publisher:
uTorrent Setup Engine  (signed by Evgen Kugitko)

Product:
uTorrent Setup Engine

Version:
10.01.238

MD5:
e71adb9cc1816b391fccab40751d7d2c

SHA-1:
3cc2321347b111185abab9d3f9ff4be262dcd524

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

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:
5/15/2024 4:16:23 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Webpick (M)
17.3.4.15

File size:
705.2 KB (722,152 bytes)

Product version:
10.01

Copyright:
Copyright (C) 2004 uTorrent

Original file name:
uTorrent.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
WebPick InstalleRex

Common path:
C:\Documents and Settings\{user}\My documents\downloads\dmaster.exe

Digital Signature
Signed by:
Evgen Kugitko

Authority:
Thawte, Inc.

Valid from:
9/24/2014 6:00:00 AM

Valid to:
9/25/2015 5:59:59 AM

Subject:
CN=Evgen Kugitko, OU=Individual Developer, O=No Organization Affiliation, L=Kiev, S=Kiev, C=UA

Issuer:
CN=Thawte Code Signing CA - G2, O="Thawte, Inc.", C=US

Serial number:
4179EA1BEC59D4CA7E66862832555480

File PE Metadata
Compilation timestamp:
6/20/1992 4:22:17 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

Entry address:
0x199B69

Entry point:
4D, 5A, 50, 00, 02, 00, 00, 00, 04, 00, 0F, 00, FF, FF, 00, 00, B8, 00, 00, 00, 00, 00, 00, 00, 40, 00, 1A, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 00, BA, 10, 00, 0E, 1F, B4, 09, CD, 21, B8, 01, 4C, CD, 21, 90, 90, 54, 68, 69, 73, 20, 70, 72, 6F, 67, 72, 61, 6D, 20, 6D, 75, 73, 74, 20, 62, 65, 20, 72, 75, 6E, 20, 75, 6E, 64, 65, 72, 20, 57, 69, 6E, 33, 32, 0D, 0A, 24, 37, 00, 00, 00, 00, 00, 00, 00, 00...
 
[+]

Code size:
687 KB (703,488 bytes)

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

http://ec2-54-88-185-190.compute-1.amazonaws.com/QCXbJx1C3Qc/lydCquoNukSWuQsobpV2Lg/lydCquoNukT88DAD8TZsAA/JfWmS8ZBI7_6Gyr-vtxVQg/.../8P2_ifLCEWCI2Dcba7osdA

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

TCP (HTTP):
Connects to r1.stylezip.info  (54.186.255.26:80)

TCP (HTTP):
Connects to c1.stylezip.info  (54.186.255.26:80)

 
http://c1.stylezip.info/?step_id=1&installer_id=617463126&publisher_id=174&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=1852389378&external_id=0&session_id=3704778756&hardware_id=4322241882&installer_file_name=dmaster

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