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ytbmk_setup.exe

Ostap Laponov

This program bundles adware during the download and install process using the InstaleRex pay-per-install app monetizer. The application ytbmk_setup.exe by Ostap Laponov 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:
Ostap Laponov  (signed and verified)

MD5:
055f46f4beb27cce2d94b9ac89d2dbf8

SHA-1:
a4352acff150eef490921172a7b3d29b7982c92e

SHA-256:
ee0d855af7963cf6df24150ff8ef30f7134da24be7ff89c6279329e4ff3ab5ee

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Uses Web-Pick's 'File Product', an Installer which wraps various products and downloads and installs it silently through the process.

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:
4/24/2024 6:09:01 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick (M)
17.3.10.0

File size:
707.3 KB (724,248 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
WebPick InstalleRex

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

Digital Signature
Signed by:
Ostap Laponov

Authority:
COMODO CA Limited

Valid from:
9/8/2013 6:00:00 PM

Valid to:
9/9/2014 5:59:59 PM

Subject:
CN=Ostap Laponov, O=Ostap Laponov, STREET=Minskаya 16, L=Kiev, S=Kiev, PostalCode=04078, C=UA

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

Serial number:
00EA64F94CDE70375038736C9F1C0960DF

File PE Metadata
Compilation timestamp:
1/2/2014 4:54:31 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

Entry address:
0xD91B

Entry point:
E8, 7E, 44, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, 98, DB, 41, 00, E8, DF, 12, 00, 00, E8, CB, 0F, 00, 00, 0F, B7, F0, 6A, 02, E8, 11, 44, 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:
7.8498  (probably packed)

Code size:
86 KB (88,064 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=625439972&publisher_id=254&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=1876319916&external_id=0&session_id=3752639832&hardware_id=4378079804&installer_file_name=ytbmk_setup

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