Cmd and Conquer: De-DOSfuscation with flare-qdb

When Daniel Bohannon released his excellent DOSfuscation paper, I was fascinated to see how tricks I used as a systems engineer could help attackers evade detection. I didn’t have much to contribute to this conversation until I had to analyze a hideously obfuscated batch file as part of my job on...

Cmd and Conquer: De-DOSfuscation with flare-qdb

When Daniel Bohannon released his excellent DOSfuscation paper, I was fascinated to see how tricks I used as a systems engineer could help attackers evade detection. I didn’t have much to contribute to this conversation until I had to analyze a hideously obfuscated batch file as part of my job on...

Revoke-Obfuscation - PowerShell Obfuscation Detection Framework

Revoke-Obfuscation is a PowerShell v3.0+ compatible PowerShell obfuscation detection framework. Authors Daniel Bohannon @danielhbohannon Lee Holmes @LeeHomes Research Blog Post: https://www.fireeye.com/blog/threat-research/2017/07/revoke-obfuscation-powershell.html White Paper:...

Revoke-Obfuscation: PowerShell Obfuscation Detection Using Science

Many attackers continue to leverage PowerShell as a part of their malware ecosystem, mostly delivered and executed by malicious binaries and documents. Of malware that uses PowerShell, the most prevalent use is the garden-variety stager: an executable or document macro that launches PowerShell to...