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TSULoader.exe

Anton Lemes

This is a WebPick installer that bundles (with very minimal user consent) a number of adware browser extensions using the JustPlug.it browser framework. The file TSULoader.exe, “Installer for Excellent4App” by Anton Lemes 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 (Tarma) installer. While running, it connects to the Internet address r1.stylezip.info on port 80 using the HTTP protocol.
Publisher:
Excellent4App  (signed by Anton Lemes)

Product:
Excellent4App

Description:
Installer for Excellent4App

Version:
2014.5.18.1727

MD5:
075673a63d850ed77fbda69c4190013c

SHA-1:
38c2ade6942f04b08b03937599da25a640ea25e6

SHA-256:
186e93a31b9b6a1eeaac5fb3f4010a7c1230e6ed5e79ba0a345deb4d29a60d98

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, hosted on TusFiles.

Analysis date:
4/19/2024 8:38:05 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.WebPick (M)
17.3.1.6

File size:
315 KB (322,560 bytes)

Product version:
1.0.0.3

Copyright:
Copyright © 2014 Excellent4App

Original file name:
TSULoader.exe

Installer:
WebPick InstalleRex (Tarma)

Common path:
C:\users\{user}\appdata\local\google\chrome\user data\default\file system\008\t\00\trze81f.tmp

Digital Signature
Signed by:
Anton Lemes

Authority:
COMODO CA Limited

Valid from:
9/19/2013 9:00:00 PM

Valid to:
9/20/2014 8:59:59 PM

Subject:
CN=Anton Lemes, O=Anton Lemes, STREET=Observatornaya 33, L=Kiev, S=Kiev, PostalCode=04053, C=UA

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

Serial number:
7EE7F083BC628C9514088005E13BBEFB

File PE Metadata
Compilation timestamp:
3/12/2013 5:51:45 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

Entry address:
0x14DB

Entry point:
55, 8B, EC, 81, EC, 2C, 06, 00, 00, 53, 56, 33, DB, 57, 66, 89, 9D, DC, FB, FF, FF, 89, 5D, F4, 89, 5D, FC, FF, 15, 74, 30, 40, 00, A3, 08, 44, 40, 00, FF, 15, 70, 30, 40, 00, 8B, F8, 8D, 45, EC, 50, FF, 15, 6C, 30, 40, 00, FF, 15, 68, 30, 40, 00, 8B, F0, F7, D6, 33, F7, FF, 15, 64, 30, 40, 00, 33, F0, 8B, 45, F0, 33, 45, EC, 68, 04, 01, 00, 00, 33, F0, 8D, 85, D4, F9, FF, FF, 50, 53, FF, 15, 60, 30, 40, 00, 85, C0, 75, 41, FF, 15, 5C, 30, 40, 00, 83, F8, 78, 75, 1A, 68, A8, 32, 40, 00, E8, 43, FB, FF, FF...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 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=612517250&publisher_id=125&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=1837551750&external_id=0&session_id=3675103500&hardware_id=4287620750&installer_file_name=trze81f.tmp

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