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Escalating Risks for the Healthcare Sector
The recent advisory issued by the FBI and CISA, jointly authored by the Department of Health and Human Services, and the MS-ISAC comes after a recent spate of attacks, orchestrated by Interlock, on the healthcare sector. Interlock Ransomware claimed responsibility for breaching DaVita, a Fortune 500 company specializing in kidney care, resulting in the theft and leak of 1.5 TB of data from their systems, as well as for hacking Kettering Health, a healthcare giant that operates over 120 outpatient facilities and employs more than 15,000 people. The group has also carried out a number of notable attacks on the education and manufacturing sector in recent months.
Notable Incidents and Tactics
CISA’s July 2025 advisory warns of the following Interlock TTPs:
- Execution of obfuscated PowerShell commands for file staging and execution
- Manual lateral movement using compromised admin credentials
- Use of legitimate cloud storage services (e.g., Mega, Dropbox) for exfiltration
- Disabling Windows Defender, Microsoft Security Center, and registry protections
- Deployment of batch scripts to automate and maintain persistence
Organizations report encrypted file extensions like .interlock, making attribution clearer post-compromise.
How BlackFog Mitigates the Risk
Stops Data Theft Before It Starts
BlackFog’s anti data exfiltration (ADX) technology proactively blocks outbound data transfers, neutralizing Interlock’s extortion mechanism.
Detects Suspicious Behavior in Real-Time
AI-driven analytics identify unusual behavior such as privilege escalation and remote execution, hallmarks of Interlock’s manual post-exploitation techniques.
Cuts Off Command & Control
Geo-fencing and real-time domain blocking prevent Interlock from contacting leak sites or external infrastructure, disrupting the attack chain.
Defends Against Fileless and Living-off-the-Land Attacks
BlackFog provides non-signature-based protection against PowerShell, RDP abuse, and zero-day exploits, bypassing legacy antivirus systems.
BlackFog vs Interlock Ransomware
|
Threat Vector |
Interlock |
BlackFog |
|
Initial Access |
Phishing, malvertising, fake updates |
Behavioral threat detection + malicious IP filtering |
|
Lateral Movement |
Manual admin exploitation via PsExec, RDP |
Real-time anomaly detection, ADX policy enforcement |
|
Data Exfiltration |
Mega.nz, FTP, OneDrive uploads |
Data exfiltration prevention (ADX) |
|
Command & Control |
Use of hidden cloud and Tor links |
Real-time IP/domain blocking + geo-fencing |
|
Security Tool Evasion |
Disables Defender and logging features |
Acts as another defense layer, stopping exfiltration even when other defenses are breached. |
Why BlackFog?
In a cyber landscape increasingly shaped by human-operated threats, organizations need more than reactive alerts, they need 24/7 real-time prevention. BlackFog delivers exactly that.
With its unique anti data exfiltration (ADX) technology, AI based behavioral threat detection, and dynamic blocking capabilities, BlackFog helps organizations prevent breaches by ensuring unauthorized data never leaves the network.
For organizations with lean internal teams, BlackFog’s vCISO services provide expert leadership, streamlined incident response, and compliance-ready reporting, all tailored to the demands of that specific industry.
Ready to Learn More?Â
Visit blackfog.com or contact us at sa***@******og.com
