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kastorsoft.exe

Somoto Israel Ltd.

This is the Somoto BetterInstaller, an installer that bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed without consent. The application kastorsoft.exe by Somoto Israel 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 Somoto BetterInstaller installer.
Publisher:
Somoto Israel Ltd.  (signed and verified)

MD5:
e608b01db886c00923adedeb8b1bfd1e

SHA-1:
7e5666089d41f4a4b03b18d5544e44c57052a1a3

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 11:11:29 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Somoto (M)
17.2.9.8

File size:
2.3 MB (2,383,312 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Somoto BetterInstaller (using Nullsoft Install System)

Common path:
C:\Documents and Settings\{user}\Local settings\temp\kastorsoft.exe

Digital Signature
Signed by:
Somoto Israel Ltd.

Authority:
The USERTRUST Network

Valid from:
2/23/2010 9:00:00 PM

Valid to:
2/4/2012 9:59:59 PM

Subject:
CN=Somoto Israel Ltd., O=Somoto Israel Ltd., STREET=Eilat 61/2401, L=Tel Aviv, S=--, PostalCode=66845, C=IL

Issuer:
CN=UTN-USERFirst-Object, OU=http://www.usertrust.com, O=The USERTRUST Network, L=Salt Lake City, S=UT, C=US

Serial number:
009324E7B7AAA5711B11734FF41E4A3D57

File PE Metadata
Compilation timestamp:
12/5/2009 8:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

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