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ext_setup.exe

Vlad Zemyn

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 ext_setup.exe by Vlad Zemyn 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. It is also typically executed from the user's temporary directory. While running, it connects to the Internet address r1.stylezip.info on port 80 using the HTTP protocol.
Publisher:
Vlad Zemyn  (signed and verified)

MD5:
7778c79c11cc2bd6a3b68a998025fafa

SHA-1:
1c0de16524800a17be9c8fe8c8e76cf5f5a96bdb

SHA-256:
49bd2c4f6f0ac722c390d689e3d457486d8ed87d307eecbb39b4b4fcf6936fe4

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:
4/19/2024 5:53:32 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick (M)
17.3.12.11

File size:
721.7 KB (739,024 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
WebPick InstalleRex

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

Digital Signature
Signed by:
Vlad Zemyn

Authority:
COMODO CA Limited

Valid from:
9/27/2013 9:00:00 AM

Valid to:
9/28/2014 8:59:59 AM

Subject:
CN=Vlad Zemyn, O=Vlad Zemyn, STREET=Oboronnaya 43, L=Kiev, S=Kiev, PostalCode=03110, C=UA

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

Serial number:
00FA2E3FCB8E83B20759399F7E1D9549EE

File PE Metadata
Compilation timestamp:
9/29/2013 10:07:26 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

Entry address:
0x13B4D

Entry point:
E8, F7, 40, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, 58, 9F, 42, 00, E8, ED, 09, 00, 00, E8, C4, 42, 00, 00, 0F, B7, F0, 6A, 02, E8, 8A, 40, 00, 00, 59, B8, 4D, 5A, 00, 00, 66, 39, 05, 00, 00, 40, 00, 74, 04, 33, DB, EB, 33, A1, 3C, 00, 40, 00, 81, B8, 00, 00, 40, 00, 50, 45, 00, 00, 75, EB, B9, 0B, 01, 00, 00, 66, 39, 88, 18, 00, 40, 00, 75, DD, 33, DB, 83, B8, 74, 00, 40, 00, 0E, 76, 09, 39, 98, E8, 00, 40, 00, 0F, 95, C3, 89, 5D, E4, E8, 96, 01, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Entropy:
7.7002  (probably packed)

Code size:
140 KB (143,360 bytes)

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=629039592&publisher_id=290&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=1887118776&external_id=0&session_id=3774237552&hardware_id=4403277144&installer_file_name=ext_setup

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