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The DFIR Report

Real Intrusions by Real Attackers, The Truth Behind the Intrusion

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Search Results for: getsystem

Another Confluence Bites the Dust: Falling to ELPACO-team Ransomware
elpacoteam mimic ransomware

Another Confluence Bites the Dust: Falling to ELPACO-team Ransomware

editor May 19, 2025

Key Takeaways The DFIR Report Services Table of Contents: Case Summary In late June 2024, an unpatched Confluence server was compromised via CVE-2023-22527, a template injection vulnerability, first from IP … Read More

BlackSuit Ransomware
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BlackSuit Ransomware

editor August 26, 2024

Key Takeaways In December 2023, we observed an intrusion that started with the execution of a Cobalt Strike beacon and ended in the deployment of BlackSuit ransomware. The threat actor … Read More

From IcedID to Dagon Locker Ransomware in 29 Days
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From IcedID to Dagon Locker Ransomware in 29 Days

editor April 29, 2024

Key Takeaways In August 2023, we observed an intrusion that started with a phishing campaign using PrometheusTDS to distribute IcedID. IcedID dropped and executed a Cobalt Strike beacon, which was … Read More

SEO Poisoning to Domain Control: The Gootloader Saga Continues
gootloader

SEO Poisoning to Domain Control: The Gootloader Saga Continues

editor February 26, 2024

Key Takeaways More information about Gootloader can be found in the following reports: The DFIR Report, GootloaderSites, Mandiant, Red Canary, & Kroll. An audio version of this report can be … Read More

Lets Open(Dir) Some Presents: An Analysis of a Persistent Actor’s Activity
metasploit opendir sliver

Lets Open(Dir) Some Presents: An Analysis of a Persistent Actor’s Activity

editor December 18, 2023

This report is a little different than our typical content. We were able to analyze data from a perspective we typically don’t get to see… a threat actor’s host! In … Read More

From ScreenConnect to Hive Ransomware in 61 hours
cobaltstrike Hive ransomware wmiexec

From ScreenConnect to Hive Ransomware in 61 hours

editor September 25, 2023

In 2022, The DFIR Report observed an increase in the adversarial usage of Remote Management and Monitoring (RMM) tools. When compared to post-exploitation channels that heavily rely on terminals, such … Read More

IcedID Macro Ends in Nokoyawa Ransomware
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IcedID Macro Ends in Nokoyawa Ransomware

editor May 22, 2023

Threat actors have moved to other means of initial access, such as ISO files combined with LNKs or OneNote payloads, but some appearances of VBA macros in Office documents can … Read More

Malicious ISO File Leads to Domain Wide Ransomware
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Malicious ISO File Leads to Domain Wide Ransomware

editor April 3, 2023

IcedID continues to deliver malspam emails to facilitate a compromise. This case covers the activity from a campaign in late September of 2022. Post exploitation activities detail some familiar and … Read More

BumbleBee Zeros in on Meterpreter
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BumbleBee Zeros in on Meterpreter

editor November 14, 2022

In this intrusion from May 2022, the threat actors used BumbleBee as the initial access vector from a Contact Forms campaign. We have previously reported on two BumbleBee intrusions (1, … Read More

BumbleBee Roasts Its Way to Domain Admin
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BumbleBee Roasts Its Way to Domain Admin

editor August 8, 2022

In this intrusion from April 2022, the threat actors used BumbleBee as the initial access vector. BumbleBee is a malware loader that was first reported by Google Threat Analysis Group … Read More

SANS Ransomware Summit 2022, Can You Detect This?
Conference

SANS Ransomware Summit 2022, Can You Detect This?

editor June 16, 2022

This report is a companion to the SANS Ransomware Summit 2022 “Can You Detect This” presentation today 6/16/22 @ 14:40 UTC (10:40 AM ET). Slides: SANS Ransomware Summit 2022 – … Read More

Will the Real Msiexec Please Stand Up? Exploit Leads to Data Exfiltration
CVE-2021-44077 Exfiltrate Data exploit Plink

Will the Real Msiexec Please Stand Up? Exploit Leads to Data Exfiltration

editor June 6, 2022

In this multi-day intrusion, we observed a threat actor gain initial access to an organization by exploiting a vulnerability in ManageEngine SupportCenter Plus. The threat actor, discovered files on the … Read More

Diavol Ransomware
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Diavol Ransomware

editor December 13, 2021

In the past, threat actors have used BazarLoader to deploy Ryuk and Conti ransomware, as reported on many occasions. In this intrusion, however, a BazarLoader infection resulted in deployment of … Read More

CONTInuing the Bazar Ransomware Story
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CONTInuing the Bazar Ransomware Story

editor November 29, 2021

In this report we will discuss a case from early August where we witnessed threat actors utilizing BazarLoader and Cobalt Strike to accomplish their mission of encrypting systems with Conti … Read More

From Zero to Domain Admin
cobaltstrike exploit hancitor

From Zero to Domain Admin

editor November 1, 2021

Intro This report will go through an intrusion from July that began with an email, which included a link to Google’s Feed Proxy service that was used to download a … Read More

Cobalt Strike, a Defender’s Guide
cobaltstrike Tools

Cobalt Strike, a Defender’s Guide

editor August 29, 2021

Intro In our research, we expose adversarial Tactics, Techniques and Procedures (TTPs) as well as the tools they use to execute their mission objectives. In most of our cases, we … Read More

Trickbot Leads Up to Fake 1Password Installation
cobaltstrike trickbot

Trickbot Leads Up to Fake 1Password Installation

editor August 16, 2021

Intro  Over the past years, Trickbot has established itself as modular and multifunctional malware. Initially focusing on bank credential theft, the Trickbot operators have extended its capabilities. More recently, Trickbot … Read More

BazarCall to Conti Ransomware via Trickbot and Cobalt Strike
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BazarCall to Conti Ransomware via Trickbot and Cobalt Strike

editor August 1, 2021

Intro This report will go through an intrusion that went from an Excel file to domain wide ransomware. The threat actors used BazarCall to install Trickbot in the environment which … Read More

IcedID and Cobalt Strike vs Antivirus
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IcedID and Cobalt Strike vs Antivirus

editor July 19, 2021

Intro Although IcedID was originally discovered back in 2017, it did not gain in popularity until the latter half of 2020.  We have now analyzed a couple ransomware cases in … Read More

Conti Ransomware
cobaltstrike conti icedid ransomware

Conti Ransomware

editor May 12, 2021

Introduction First seen in May 2020, Conti ransomware has quickly become one of the most common ransomware variants, according to Coveware. As per Coveware’s Quarterly Ransomware Report (Q1 2021), Conti … Read More

Bazar, No Ryuk?
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Bazar, No Ryuk?

editor January 31, 2021

Intro In the fall of 2020, Bazar came to prominence when several campaigns delivered Ryuk ransomware. While Bazar appeared to drop-off in December, new campaigns have sprung up recently, using … Read More

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