CrowdStrike’s 2018 Mid-Year Review

During the past week CrowdStrike published its 2018 Mid-Year Review call “Observation from the front lines of threat hunting“. This report provides insights, trends and details on today’s most sophisticated cyber attacks observed by CrowdStrike Falcon OverWatch team.

Some interesting points of the report include:

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Anti-Virus Log Analysis Cheat Sheet (v1.5)

Florian Roth published the new version of Anti-Virus Log Analysis Cheat Sheet (version 1.5). I highly recommend to implement monitoring of the events included in this cheat sheet. To my mind, this is the easiest and quickest win and AV logs are one of the first things I hunt whenever I go to a new environment.

The new version has information on :

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GhostPack: C# Offensive Framework

This is a game changer for red teaming and offensive security. The guys from SpecterOps have just published GhostPack. This represents the transition from Offensive PowerShell frameworks to C# frameworks. This was much expected as blue teams are catching up on PowerShell detection/prevention controls. Moreover, red teams need “offense in depth” having different variations of their toolset based on the engagement needs.

GhostPack is a collection various C# implementations of previous PowerShell functionality, and includes six separate toolsets being released:

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CrySyS Lab Analysis on NSA’s Territorial Dispute

CrySyS Lab has provided a great document on its analysis on NSA’s perspective on the APT landscape. The analysis is based on Shadow Brokers leak (“Lost in Translation” leak) and most specifically on the module called “Territorial Dispute“. The purpose of this module is to detect presence of competing state intelligence services. NSA wanted to secure its operations, avoid any conflict between “Five Eyes” group as well as get intelligence on the targets of the competing state intelligence services.

See below some interesting points related to the analysis done by CrySyS Lab:

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WMI Persistence Goes Mainstream

This blog post from CrowdStrike provides some good information related to the persistence mechanisms used by WannaMine cryptomining worm. According to the post, WannaMine employs “living off the land” techniques such as Windows Management Instrumentation (WMI) permanent event subscriptions as a persistence mechanism. It is really interesting that crypto mining malware adapt so quickly their TTPs and use techniques that are mostly used by APT groups.

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Post Exploitation 101

I read the following tweet by Florian Roth a couple of days ago:

I could not agree more with the reply from Florian. See below a list of resources that help tuning detection mechanisms for post exploitation activities.

  1. Windows enumeration commands 
  2. Windows post exploitation resources
  3. Living off the land
  4. Windows commands abused by the attackers
  5. Post Exploitation using WMIC
  6. Post Exploitation in Windows using dir Command
  7. Post Exploitation on Windows PC
  8. Linux post exploitation
  9. Patterns of behaviour

Enjoy and happy hunting ;)