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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
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Exertis and eSentire Partner to Deliver 24/7 Multi-Signal MDR, Digital Forensics & IR Services and Exposure Management to Organisations Across the UK, Ireland, and Europe
Basingstoke, UK– 20 March, 2023. Leading technology distributor, Exertis, announced today that it has bolstered its cybersecurity services, adding eSentire, the Authority in Managed Detection and Response (MDR), to its Enterprise portfolio of offerings. eSentire’s award-winning, 24/7 multi-signal MDR, Digital Forensics & Incident Response (IR), and Exposure Management services will be available…
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Security advisories — Feb 26, 2019

Ransomware Variant (CryptoFortress) Advisory

4 minutes read
Speak With A Security Expert Now

We have discovered a new ransomware (malware) variant referenced as CryptoFortress in the wild and would like to provide additional information as to what we have discovered at this time. Please find below a more detailed investigation into the behavior of and mitigation methods applicable to CryptoFortress ransomware.

What We Know

Behavior of CryptoFortress:

Additional Information:

eSentire Defenses

eSentire features that help protect you:

Further Protection

How to further protect yourself from this emerging threat:

User awareness (Infections are occurring from users clicking on a malicious payload that is being delivered via spam email attachments).

eSentire recommends blocking .zip and .exe file extensions on your SMTP server.

Back up important data offline.

If you are running Windows 7 Ultimate/Enterprise or Windows 8 Pro/Enterprise you have the ability to use AppLocker. AppLocker is able to defend against CryptoFortress infections because it can require all programs to be signed by a legitimate software publisher.

Alternatively, AppLocker has the ability to whitelist folders.

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