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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:
17fa243a282e6a40ec91f9cd6483275a

SHA-1:
c089f01afee2877a9de12a63656d51801bad51fc

SHA-256:
fc5acdff7ce88a03660865e5c79ea50ca69f51e3a5b27f0fa377368edb09a3d5

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 'download manager' is also considered bundleware, a utility designed to download software (possibly legitimate or opensource) and bundle it with a number of optional offers including ad-supported utilities, toolbars, shopping comparison tools and browser extensions.

Analysis date:
4/19/2024 12:00:52 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick.OstapLaponov.Bundler (M)
16.2.5.20

File size:
707.7 KB (724,696 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:
9/9/2013 1:00:00 AM

Valid to:
9/10/2014 12:59:59 AM

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 11:54:31 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
12288:4uCn5DA1iBjZIjoqNHcARaU+vj7+2VitW9f504H4+cR2ufQn9ei7AZR4Znb2CHiz:41nuYjZ0XN8NUO71eW9e4Yqufa9eCAZJ

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:
7.8614  (probably packed)

Code size:
86 KB (88,064 bytes)

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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