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The DFIR Report

Real Intrusions by Real Attackers, The Truth Behind the Intrusion

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Tuesday, April 20, 2021

Category: defense evasion

Defender Control
defense evasion Tools

Defender Control

December 13, 2020

Defender Control is a free software utility we’ve come across in various intrusions. The creators describe it by saying the following: What is certain however is that it [Windows Defender] … Read More

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Recent Posts: The DFIR Report

Ryuk in 5 Hours

Ryuk in 5 Hours

Intro The Ryuk threat actors went from a phishing email to domain wide ransomware in 5 hours. They escalated privileges using Zerologon (CVE-2020-1472), less than 2 hours after the initial … Read More

Ryuk’s Return

Ryuk’s Return

Intro The Ryuk group went from an email to domain wide ransomware in 29 hours and asked for over $6 million to unlock our systems. They used tools such as … Read More

NetWalker Ransomware in 1 Hour

NetWalker Ransomware in 1 Hour

The threat actor logged in through RDP, attempted to run a Cobalt Strike Beacon, and then dumped memory using ProcDump and Mimikatz. Next, they RDPed into a Domain Controller, minutes … Read More

Dridex – From Word to Domain Dominance

Dridex – From Word to Domain Dominance

Ransomware Again…But We Changed the RDP Port!?!?!

Ransomware Again…But We Changed the RDP Port!?!?!

Here’s another example of threat actors brute forcing RDP to install ransomware, this time the brute forced system was not using the default RDP port. The threat actors installed ransomware … Read More

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