• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 55

 | 

Security Affairs newsletter Round 534 by Pierluigi Paganini – INTERNATIONAL EDITION

 | 

Law enforcement operations seized BlackSuit ransomware gang’s darknet sites

 | 

Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme

 | 

Operation CargoTalon targets Russia’s aerospace with EAGLET malware,

 | 

Unpatched flaw in EoL LG LNV5110R cameras lets hackers gain Admin access

 | 

Koske, a new AI-Generated Linux malware appears in the threat landscape

 | 

Mitel patches critical MiVoice MX-ONE Auth bypass flaw

 | 

Coyote malware is first-ever malware abusing Windows UI Automation

 | 

SonicWall fixed critical flaw in SMA 100 devices exploited in Overstep malware attacks

 | 

DSPM & AI Are Booming: $17.87B and $4.8T Markets by 2033

 | 

Stealth backdoor found in WordPress mu-Plugins folder

 | 

U.S. CISA adds CrushFTP, Google Chromium, and SysAid flaws to its Known Exploited Vulnerabilities catalog

 | 

U.S. CISA urges FCEB agencies to fix two Microsoft SharePoint flaws immediately and added them to its Known Exploited Vulnerabilities catalog

 | 

Sophos fixed two critical Sophos Firewall vulnerabilities

 | 

French Authorities confirm XSS.is admin arrested in Ukraine

 | 

Microsoft linked attacks on SharePoint flaws to China-nexus actors

 | 

Cisco confirms active exploitation of ISE and ISE-PIC flaws

 | 

SharePoint under fire: new ToolShell attacks target enterprises

 | 

CrushFTP zero-day actively exploited at least since July 18

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Cyber Crime
  • Malware
  • CryPy ransomware uses a unique Key for each encrypted file

CryPy ransomware uses a unique Key for each encrypted file

Pierluigi Paganini October 16, 2016

Experts from Kaspersky have spotted a new threat in the wild written in Python, the CryPy ransomware that uses a unique key for each.

Researcher newly founded “CryPy “ Ransomware written in python has surprised Israeli server for command and control (C&C) communication. In past, we have other ransomware written in python like Zimbra, HolyCrypt, and Fs0ciety Locker but CryPy Ransomware can encrypt each file separately with a unique key.

“boot_common.py and encryptor.py” are two python executable files included in the CryPy Ransomware which are mainly responsible for error-logging on Windows platforms and encryption respectively.

“This Python executable comprises two main files. One is called boot_common.py and the otherencryptor.py. The first is responsible for error-logging on Windows platforms, while the second, the encryptor, is the actual locker. Within the encryptor are a number of functions including two calls to the C&C server.” reads a blog post published by Kaspersky. “The C&C is hidden behind a compromised web server located in Israel. “

What about the attack chain related to this specific threat?

Bad actors compromised an Israeli server that was vulnerable to a well-known “Magento” vulnerability which allows attacker to upload a PHP shell script and additional files to transfer data in clear text format to the serve. The flaw could also be exploited to help attackers to carry out man in middle attack.

Surprisingly, the server was also used by attackers for phishing attacks through Paypal phishing pages. Researcher says Hebrew-speaking was behind these attacks.

“A notable point to mention is that the server was also used for phishing attacks, and contained Paypal phishing pages. There are strong indications that a Hebrew-speaking threat actor was behind these phishing attacks.” continues the analysis published by Kaspersky. “The stolen Paypal credentials were forwarded to another remote server located in Mexico and which contains the same arbitrary file upload technique, only with a different content management.

“It is a known practice for attackers to look for low-hanging fruit into which they can inject their code in order to hide their C&C server. One such example was the CTB-Locker for web servers reported last March.”

According to researchers, when crypy sends the file name and victim ID to the server, it receives in response a unique key after encryption get generate along with new filename. Thereafter, generated unique key helps attackers to provide victims to decrypt files for free to maintain integrity and trust.

CryPy ransomware

If you are interested in the IoC for CryPy ransomware give a look at the Kaspersky report.

Written by: Sumit Kumar

Cyber security researcher

MS cyber security , Qualys Certified Specialist, CEHv8, ISO 27001

[adrotate banner=”9″]

Pierluigi Paganini

(Security Affairs – CryPy ransomware, cybercrime)


facebook linkedin twitter

CryPy ransomware Cybercrime encryption Hacking malware

you might also like

Pierluigi Paganini July 27, 2025
SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 55
Read more
Pierluigi Paganini July 27, 2025
Security Affairs newsletter Round 534 by Pierluigi Paganini – INTERNATIONAL EDITION
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 55

    Malware / July 27, 2025

    Security Affairs newsletter Round 534 by Pierluigi Paganini – INTERNATIONAL EDITION

    Breaking News / July 27, 2025

    Law enforcement operations seized BlackSuit ransomware gang’s darknet sites

    Cyber Crime / July 26, 2025

    Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme

    Intelligence / July 26, 2025

    Operation CargoTalon targets Russia’s aerospace with EAGLET malware,

    Intelligence / July 25, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT