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newtab_setup.exe

Kiril Klimko

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 newtab_setup.exe by Kiril Klimko 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 downloadfriend.net. While running, it connects to the Internet address r1.stylezip.info on port 80 using the HTTP protocol.
Publisher:
Kiril Klimko  (signed and verified)

MD5:
fb955e04d642016f614bded2226eb6ed

SHA-1:
eb948d9950aeed6aa9edcecc3bea3058b93d746e

SHA-256:
658a8051dd6ef130904f5b26d1240883b6ab915665d2f82e31e11f9b653336b6

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 an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
4/26/2024 6:32:59 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick.KirilKlimko.Bundler (M)
16.2.7.8

File size:
1.5 MB (1,578,544 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
WebPick InstalleRex

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

Digital Signature
Signed by:
Kiril Klimko

Authority:
COMODO CA Limited

Valid from:
9/3/2013 1:00:00 AM

Valid to:
9/4/2014 12:59:59 AM

Subject:
CN=Kiril Klimko, O=Kiril Klimko, STREET=Perova 21, L=Kiev, S=Kiev, PostalCode=02125, C=UA

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

Serial number:
4F8445DA07CAF9C24D869920925BA182

File PE Metadata
Compilation timestamp:
3/16/2014 12:34:27 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
24576://3ZkZTpLJJm2JBbhGt1yEFJJ8VVSSjx4lAdqFCiMnKF6uY7dUg9Ppp9TL9:ZkZlJE2fl0JJ2FF2NFC9nsY7fPxTL9

Entry address:
0x10A4B

Entry point:
E8, 3E, 4A, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, B8, 21, 42, 00, E8, 1F, 21, 00, 00, E8, E0, 07, 00, 00, 0F, B7, F0, 6A, 02, E8, D1, 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, 90, 37, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Entropy:
7.9045  (probably packed)

Code size:
103 KB (105,472 bytes)

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

http://downloadfriend.net/?e=wbn&prv=SNT&publisher=1967&country=GB&ind=2256386591778560363&exid=1395598575916569791&ssd=16179875152966995655&hid=12784766313413759611&osid=601&channel=0&sfx=1&jc=1&category_name=NewTab&install_date=20130323&ntab=http://.../

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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