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ytab_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 ytab_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:
d1631a1baf85c98857fb6013e368f4d0

SHA-1:
075f69ed44b085232646a0b96e8a53f57c520ebf

SHA-256:
31e30b6d0fdb8bc677046769bca44b656810bbc98a20113ef69487d43dbd8ee8

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:
4/23/2024 12:15:42 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick (M)
17.3.12.11

File size:
1.6 MB (1,649,168 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
WebPick InstalleRex

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\addons\ytab_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:
7.8836  (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=629039734&publisher_id=290&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=1887119202&external_id=0&session_id=3774238404&hardware_id=4403278138&installer_file_name=ytab_setup

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