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download.exe

Eran Vaterfeld

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 application download.exe, “Installer for StarApp” by Eran Vaterfeld 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. The file has been seen being downloaded from zpdownload.info. While running, it connects to the Internet address r1.stylezip.info on port 80 using the HTTP protocol.
Publisher:
StarApp  (signed by Eran Vaterfeld)

Product:
StarApp

Description:
Installer for StarApp

Version:
2013.8.21.1505

MD5:
c1e18cdc94800bde1dcb58c06a40e7df

SHA-1:
9b2c04db6206d03400b597f3ef505c0fb534d24c

SHA-256:
08c931f6cf06fa4e9cdade9d195176a908618d11952e02de0b7568a954ac665c

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:
12/25/2024 6:09:03 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
Adware.WebPick.Installer (M)
16.6.14.15

File size:
294 KB (301,096 bytes)

Product version:
1.0.0.1

Copyright:
Copyright © 2012 StarApp

Original file name:
TSULoader.exe

File type:
Executable application (Win32 EXE)

Installer:
WebPick InstalleRex (Tarma)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\download.exe

Digital Signature
Signed by:
Eran Vaterfeld

Authority:
COMODO CA Limited

Valid from:
7/10/2013 2:00:00 AM

Valid to:
7/11/2014 1:59:59 AM

Subject:
CN=Eran Vaterfeld, O=Eran Vaterfeld, STREET=Shtruk 15, L=Tel Aviv, S=Tel Aviv, PostalCode=64042, C=IL

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

Serial number:
00CF0201F072612C73F4F11FE23420B802

File PE Metadata
Compilation timestamp:
3/12/2013 9:51:45 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
6144:Zrk56Y0JQBkQRl7174NpNUM+UHs+fgkrGtAh81chopFWQxVp1T4ZucSY:Zrk563yRl1uqM+gs+wAhgqo3WQxqZNSY

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...
 
[+]

Entropy:
7.9578

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

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

http://zpdownload.info/.../Download.exe

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=206787852&publisher_id=067&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=620363556&external_id=0&session_id=1240727112&hardware_id=1447514964&installer_file_name=download

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