Krypton Spyware

First observed in April 2019, Krypton (or Krypton Stealer) is a credential stealing spyware tool sold through a number of hacking forums and dark web sites.

Threat ID:: CC-3207
Category:: Spyware
Threat Severity:: Medium
Threat Vector:: Spam
Published:: 11 September 2019 12:00 AM

Report a cyber attack: call 0300 303 5222 or email [email protected]

Summary

First observed in April 2019, Krypton (or Krypton Stealer) is a credential stealing spyware tool sold through a number of hacking forums and dark web sites.

Affected platforms

The following platforms are known to be affected:

Microsoft Windows

Microsoft Windows - Versions 7, 8, 8.1, and 10

Windows 10

Windows 7

Threat details

As Krypton is sold directly to attackers it is likely that multiple methods are used to distribute it; however, as of the time of publication it has only been observed as a payload in spam campaigns.

Once installed, Krypton will collect system and user information before sending it to a command and control (C2) server. It will then attempt to extract credentials from the following applications:

Multiple web browsers including Google Chrome, Mozilla Firefox, and Microsoft Edge and Internet Explorer.
The ProtonVPN and NordVPN VPNapplications.
Messaging applications including WhatsApp and Telegram.
FTP clients such as FileZilla, Total Command and WinSCP.

Any extracted credentials are stored within TXT files and sent to the C2 server.

Remediation steps

Type	Step
	To prevent and detect an infection, ensure that: A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails. All operating systems, anti-virus and other security products are kept up-to-date. Regular anti-virus and security scans are performed on your organisation’s estate. All day-to-day computer activities such as email and internet are performed using non-administrative accounts. Strong password policies are in place. Network, proxy and firewall logs should be monitored for suspicious activity. User accounts accessed from affected devices should be reset on a clean computer. Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

Type

Step

To prevent and detect an infection, ensure that:

A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
All operating systems, anti-virus and other security products are kept up-to-date.
Regular anti-virus and security scans are performed on your organisation’s estate.
All day-to-day computer activities such as email and internet are performed using non-administrative accounts.
Strong password policies are in place.
Network, proxy and firewall logs should be monitored for suspicious activity.
User accounts accessed from affected devices should be reset on a clean computer.
Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

Last edited: 14 February 2020 2:54 pm