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multipackbase.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 multipackbase.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 wot-planet.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:
281990f322312e37bf29104d1a06ecbd

SHA-1:
ccf6ad84be5beecd710e52cf56234e866cd4dbfe

SHA-256:
22d9cc184b81a407a9852628773b1ce97a9a868d44a94a30ce53c4ec217ea003

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 an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
5/31/2024 9:41:34 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Webpick.EvgenKug.Bundler (M)
16.5.31.22

File size:
914.7 KB (936,680 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:\users\{user}\downloads\multipackbase.exe

Digital Signature
Signed by:
Evgen Kugitko

Authority:
Thawte, Inc.

Valid from:
9/24/2014 3:00:00 AM

Valid to:
9/25/2015 2:59:59 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 1:22:17 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:OsHFe3xGNTLqRdSd4b3+cW481CGGJG+JN6Ka:7e3sgRN3+hAzJAp

Entry address:
0x1F9017

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:
703.5 KB (720,384 bytes)

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

http://wot-planet.com/.../classes/moneyinst/mi_request.php?sid=MTY=&url=aHR0cDovL3dvdC1wbGFuZXQuY29tL2VuZ2luZS9kb3dubG9hZC5waHA/aWQ9NjAzNw==&name=bXVsdGlwYWNrYmFzZS5leGU=&type=Mg==&href=http://wot-planet.com/.../download.php?id=6037

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

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

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