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Nocturnal Stealer Browser Spyware

A newly identified spyware tool called Nocturnal Stealer has been observed targeting popular browsers and cryptocurrency wallets.
Threat ID:
CC-2459
Category:
Spyware
Threat Severity:
Low
Threat Vector:
Drive by download
Published:
4 June 2018 12:00 AM
Report a cyber attack: call 0300 303 5222 or email [email protected]

This content has been archived

This article no longer conforms to NHS Digital's standards for cyber alerts, and may contain outdated or inaccurate information. Use of this information contained in this page is at your own risk

Summary

A newly identified spyware tool called Nocturnal Stealer has been observed targeting popular browsers and cryptocurrency wallets.

Threat details

Nocturnal Stealer is delivered by an unidentified downloader and uses several common anti-analysis techniques including checking for emulation software and environment fingerprinting. Connection to a command and control (C2) server is made using the free service ip-api[.]com.

Once installed, Nocturnal Stealer will attempt to collect system information such as machine ID, operating system and device architecture before sending this to a C2 server. It will then analyse the available browser network traffic and collect the following information:

  • Credit and debit card information
  • Account credentials and passwords
  • FTP passwords
  • Search and keyboard histories
  • Cryptocurrency wallet details

Remediation advice

To prevent and detect an infection, ensure that:

Remediation steps

Type Step
  • 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.
  • 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: 17 February 2020 12:50 pm