All Huntress Blog Posts

All Huntress Blog Posts

All things cybersecurity engaging and accessible - so you can stay ahead of hackers and boost your cybersecurity savviness.

Author: Anna Pham
Threat Research
Seven Steps to Ransomware: CitrixBleed 2 Weaponized by Initial Access Brokers
Seven Steps to Ransomware: CitrixBleed 2 Weaponized by Initial Access Brokers

Huntress has observed a series of strikingly similar intrusions beginning with CitrixBleed 2 exploitation, employing novel local privilege escalation techniques, and ending in Dragonforce ransomware.

Someone's Hands Are on Your Keyboard Then Your Whole Network. Courtesy of ClickFix, Potemkin, RMMProject and EtherRAT
Someone's Hands Are on Your Keyboard Then Your Whole Network. Courtesy of ClickFix, Potemkin, RMMProject and EtherRAT

A ClickFix infection drops Potemkin loader and RMMProject RAT, leading to browser theft, hidden remote desktop, and lateral movement across over 11 hosts.

June 16, 2026
From Malspam to Fileless .NET Loader
From Malspam to Fileless .NET Loader

A malspam campaign abusing Google's DoubleClick delivers DesckVB RAT through a five-stage chain that evades detection and blinds Windows telemetry before persisting

ClickFix Removes Your Background but Leaves the Malware
ClickFix Removes Your Background but Leaves the Malware

Your background is gone, but malware is here. Huntress breaks down BackgroundFix, a new ClickFix social engineering tactic involving CastleLoader, NetSupport RAT, and CastleStealer. Read the analysis.

April 30, 2026
Nightmare-Eclipse Tooling Moves From Public PoC to Real-World Intrusion
Nightmare-Eclipse Tooling Moves From Public PoC to Real-World Intrusion

Huntress observed in-the-wild use of Nightmare-Eclipse tooling, including BlueHammer, RedSun, and UnDefend, in a live intrusion involving FortiGate VPN compromise as the initial access, reconnaissance commands, and likely tunneling activity.

Someone Else’s SIEM: A Threat Actor Abuses Another Free Trial
Someone Else’s SIEM: A Threat Actor Abuses Another Free Trial

A threat actor exploited SolarWinds Web Help Desk, then ran victim triage from a free Elastic Cloud SIEM trial. The infrastructure they left behind told us everything.

Exorcising Demons: Fake Tech Support Delivers Havoc Command & Control
Exorcising Demons: Fake Tech Support Delivers Havoc Command & Control

Fake tech support scams used to end with a gift card. Now they end with a modified Havoc C2 framework in your environment, using indirect syscalls to dodge your EDR.

ClickFix Won't Die. Neither Will Matanbuchus. A New RAT and a Hands-on-Keyboard Intrusion
ClickFix Won't Die. Neither Will Matanbuchus. A New RAT and a Hands-on-Keyboard Intrusion

ClickFix delivered the initial access, Matanbuchus did the loading, and a new RAT handled the rest. This February 2026 intrusion has all the ingredients of a campaign that isn't slowing down.

February 16, 2026
Employee Monitoring and SimpleHelp Software Abused in Ransomware Operations
Employee Monitoring and SimpleHelp Software Abused in Ransomware Operations

Tools built to monitor employees and support remote workers are being repurposed for ransomware operations. Net Monitor for Employees and SimpleHelp are the latest to be abused — here's how.

They Got In Through SonicWall. Then They Tried to Kill Every Security Tool
They Got In Through SonicWall. Then They Tried to Kill Every Security Tool

They got in through SonicWall, then deployed a forensic tool's signed driver to kill endpoint security from kernel mode. Huntress disrupted the attack before ransomware deployed. Here's the full breakdown.

February 4, 2026
Dissecting CrashFix: KongTuke's New Toy
Dissecting CrashFix: KongTuke's New Toy

KongTuke built a fake browser extension that tells users their browser crashed and needs a scan. It doesn't. Huntress tracked this campaign back to a threat actor we've been following since 2025.

Reflecting on AI in 2025: Faster Attacks, Same Old Tradecraft
Reflecting on AI in 2025: Faster Attacks, Same Old Tradecraft

The AI-powered cyberattack apocalypse didn't happen in 2025. What did happen was quieter and more dangerous: attackers got faster and cheaper at the tradecraft they were already running.

The Great VM Escape: ESXi Exploitation in the Wild
The Great VM Escape: ESXi Exploitation in the Wild

An ESXi VM escape exploit appeared in the wild with simplified Chinese development paths and the characteristics of a zero-day. Huntress traced the intrusion from SonicWall VPN all the way through.

January 7, 2026
ClickFix Gets Creative: Malware Buried in Images
ClickFix Gets Creative: Malware Buried in Images

ClickFix delivered the access. Then the malware hid inside PNG pixel data. This multi-stage chain ends with LummaC2 and Rhadamanthys pulled directly out of an image file.

November 24, 2025