Praetorian Security Blog
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Using Slack as a C2 Channel: MITRE ATT&CK – Web Service (T1102)
Posted by Josh Abraham
Our proof of concept (PoC) blends in with normal business activities such as user-to-user or user-to-group communications. Detecting this type of activity requires sophisticated network analysis capabilities, such as the ability to intercept and decrypt SSL messages. Future versions may add additional encryption on top of SSL. In our PoC, we also configure a random sleep between 1m and 5m to further obfuscate our activity. These sleep times can help our C2 fly under the radar, but will also impact the ability of the attack operator to execute rapidly depending on how aggressively the timeouts are configured.
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Why Praetorian Benchmarks to MITRE ATT&CK™ and Why You Should Too
Posted by Daniel Wyleczuk-Stern
When it came to improving our Purple Team service line, which maps to “Detect” and “Respond” in the NIST CSF, we wanted to provide a similar high quality of data and metrics to our clients. In our experience, it is hard to drive change in any organization unless those changes can be tied to measurable results. After conducting a survey of known frameworks, we settled on the ATT&CK™ framework from MITRE.
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Safely Conduct Security Assessments of Industrial Control System (ICS) Environments
Posted by Praetorian Staff
Our current standard of living is made possible due to the massive scale of critical infrastructure that supports our needs as a society. Electricity, Oil, Gas, Water, and Security are a few of the well-known industries whose infrastructure is managed by Industrial Control Systems (ICS). Few systems have the potential for catastrophic consequences from a security incident as is possible with an ICS breach.
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Running a .NET Assembly in Memory with Meterpreter
Posted by Thomas Hendrickson
In this blog post I will discuss leveraging Meterpreter’s powershell module to execute .NET assemblies in-memory. Metasploit and Meterpreter are effective and useful tools, but occasionally one encounters a situation where they lack features. Cobalt Strike (a different Command and Control framework) contains an execute-assembly command providing in-memory .NET execution for situations where it lacks built in commands. Meterpreter contains the features required to perform the same behavior, albeit slightly less polished.
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Active Directory Visualization for Blue Teams and Threat Hunters
Posted by Andrew Cook
As a network defender, it can be easy to attribute a certain degree of omnipotence to attackers. Advanced threats have an uncanny knack for figuring out how to move through an environment without regards for passwords, roles, permissions, or what “should” be possible.
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Signed Binaries Proxy Execution - T1218
Posted by Josh Abraham
The MITRE ATTACK April release included is a new TTP known as 'Signed Binaries Proxy Execution' which is T1218. This TTP is based on an attacker using signed binaries to perform malicious activities.
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Signed Scripts Proxy Execution - T1216
Posted by Josh Abraham
Many organizations trust all signed code from Microsoft. Unfortunately, there are many ways in which attackers can use this trust against them. Previously, we covered using signed binaries to perform malicious activities. In this post, we will be covering how to use signed scripts.
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How to use Kerberoasting - T1208 for Privilege Escalation
Posted by Josh Abraham
In our experience, Kerberoasting is an attack that is similar to others in that defenders need to fully under it to be able to properly migrate the risks. It’s our goal that through pushing this content into the MITRE ATT&CK framework we have increased the awareness of this TTP so that organizations can be better protected in the future.
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Summary of April MITRE ATT&CK RELEASE
Posted by Josh Abraham
MITRE’s Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK™) is a curated knowledge base and model for cyber adversary behavior, reflecting the various phases of an adversary’s lifecycle and the platforms they are known to target. ATT&CK is useful for understanding security risk against known adversary behavior, for planning security improvements, and verifying defenses work as expected.
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Privilege Escalation in AWS with PassRole Attacks
Posted by Kesten Broughton
All instances launched by AWS by default have instance credentials supplied by the AWS metadata service. AWS operators can attach PassRole policies given to an instance at launch time.
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