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Cobalt Strike 4.11: Shhhhhh, Beacon is Sleeping….

Cobalt Strike 4.11 is now available. This release introduces a novel Sleepmask, a novel process injection technique, new out-of-the-box obfuscation options for Beacon, asynchronous BOFs,

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Update: Stopping Cybercriminals from Abusing Cobalt Strike

Since 2023, Microsoft’s Digital Crimes Unit (DCU), Fortra, and the Health Information Sharing and Analysis Center (Health-ISAC) have been working together to combat the use

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Out of Band Update: Cobalt Strike 4.10.1

Cobalt Strike 4.10.1 is now available. This is an out of band update to fix issues that were discovered in Cobalt Strike 4.10 that we

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Cobalt Strike Staffing Changes and the Road Ahead

TLDR: Cobalt Strike Staffing Changes Recently there have been some internal changes within the Cobalt Strike team. Greg Darwin has switched to a new position

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Revisiting the UDRL Part 3: Beacon User Data

The UDRL and the Sleepmask are key components of Cobalt Strike’s evasion strategy, yet historically they have not worked well together. For example, prior to

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Cobalt Strike 4.10: Through the BeaconGate

Cobalt Strike 4.10 is now available. This release introduces BeaconGate, the Postex Kit, and Sleepmask-VS. In addition, we have overhauled the Sleepmask API, refreshed the

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Europol Coordinates Global Action Against Criminal Abuse of Cobalt Strike

Press Release: View Original Europol Announcement 03 Jul 2024 – Law enforcement has teamed up with the private sector to fight against the abuse of

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Cobalt Strike Infrastructure Downtime – March 2024

The Cobalt Strike download infrastructure will be down for a short while on Wednesday 13th March for routine maintenance. Work will begin around 15:00 GMT

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Introducing the Mutator Kit: Creating Object File Monstrosities with Sleep Mask and LLVM

This is a joint blog written by William Burgess (@joehowwolf) and Henri Nurmi (@HenriNurmi). In our ‘Cobalt Strike and YARA: Can I Have Your Signature?’

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Cobalt Strike Infrastructure Maintenance – January 2024

We will be making a small change to the Cobalt Strike infrastructure next week. This will not result in any downtime but will affect updates

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