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The DFIR Report

Real Intrusions by Real Attackers, The Truth Behind the Intrusion

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Tuesday, January 19, 2021

Category: ransomware

PYSA/Mespinoza Ransomware
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PYSA/Mespinoza Ransomware

November 23, 2020

Intro Over the course of 8 hours the PYSA/Mespinoza threat actors used Empire and Koadic as well as RDP to move laterally throughout the environment, grabbing credentials from as many … Read More

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Ryuk Speed Run, 2 Hours to Ransom
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Ryuk Speed Run, 2 Hours to Ransom

November 5, 2020

Intro Since the end of September Ryuk has been screaming back into the news. We’ve already covered 2 cases in that timeframe. We’ve seen major healthcare providers, managed service providers, … Read More

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Ryuk in 5 Hours
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Ryuk in 5 Hours

October 18, 2020

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

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Ryuk’s Return
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Ryuk’s Return

October 8, 2020

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

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NetWalker Ransomware in 1 Hour
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NetWalker Ransomware in 1 Hour

August 31, 2020

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

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

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

July 13, 2020

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

Snatch Ransomware
Meterpreter ransomware rdp yara

Snatch Ransomware

June 21, 2020

Another RDP brute force ransomware strikes again, this time, Snatch Team! Snatch Team was able to go from brute forcing a Domain Administrator (DA) account via RDP, to running a … Read More

The Little Ransomware That Couldn’t (Dharma)
ransomware rdp yara

The Little Ransomware That Couldn’t (Dharma)

June 16, 2020

Ransomware continues unabated in the year of continually mounting pressure. But for every big game actor out there compromising Fortune listed companies there are the little guys that maybe just … Read More

Lockbit Ransomware, Why You No Spread?
ransomware rdp yara

Lockbit Ransomware, Why You No Spread?

June 10, 2020

RDP brute forcing continues to be a favorite entry point for ransomware actors. In this past month we saw activity from the Lockbit ransomware family. Initial Access: RDP login from … Read More

Dharma Ransomware
ransomware rdp

Dharma Ransomware

April 14, 2020

An attacker logged into the honeypot via RDP from 178.239.173[.]172. Within 10 minutes the attacker went from local admin, to domain admin to installing ransomware on multiple machines. The attacker … 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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