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ext_setup.exe

Anton Kulichenko

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 Anton Kulichenko 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. The file has been seen being downloaded from save4u.eu. While running, it connects to the Internet address r1.stylezip.info on port 80 using the HTTP protocol.
Publisher:
Anton Kulichenko  (signed and verified)

MD5:
2b93c40ea3866b2d572c38a272ea6a00

SHA-1:
40207dac679ee181f42f1db9d7c714f944dd1f30

SHA-256:
3ce82fefdb69b0794dfc0fc16cd208fd879aba176f484fb62f8dfb0b2575ae03

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 7:54:26 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick.AntonKulichenko.Bundler (M)
16.2.4.4

File size:
663.1 KB (679,064 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:
Anton Kulichenko

Authority:
COMODO CA Limited

Valid from:
12/3/2013 7:00:00 AM

Valid to:
12/4/2014 6:59:59 AM

Subject:
CN=Anton Kulichenko, O=Anton Kulichenko, STREET=Engineering 7, L=Kiev, S=Kiev, PostalCode=01013, C=UA

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

Serial number:
00E406368A873FE17B8962DA09A05F7B2E

File PE Metadata
Compilation timestamp:
3/3/2014 5:29:50 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
12288:2AQqwnDRZ9BSptvMOuFTrIK1XFw8HPJPZADfYbbIJNub1eTmrc4FX3+r4jnt:2dLZ9BUE1VPwyhP20bbIJNupeTmxRnnt

Entry address:
0x11EBB

Entry point:
E8, CE, 49, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, F8, 32, 42, 00, E8, AF, 20, 00, 00, E8, E0, 07, 00, 00, 0F, B7, F0, 6A, 02, E8, 61, 49, 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, 20, 37, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Entropy:
7.7524  (probably packed)

Code size:
108 KB (110,592 bytes)

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

http://save4u.eu/?e=wbsv&publisher=1851&dd=4&country=TH&ind=4880438331039742664&exid=1393914381359123926&ssd=13535100377203668220&hid=10611653911324677533&osid=601&channel=0&sfx=1&jc=1&category_name=WebSave2&install_date=20130304

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=59063954&publisher_id=906&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=177191862&external_id=0&session_id=354383724&hardware_id=413447678&installer_file_name=ext_setup

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