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Financially Motivated1 malware family

CIRCUS SPIDER

Also known asCIRCUS SPIDER

Circus Spider is the CrowdStrike-tracked eCrime threat actor behind NetWalker ransomware. Reporting in the provided content states that NetWalker generally targeted hospitals in the U.S. and Spain, and that the actor claimed to have attacked a Philadelphia-area health system in June 2020. The content also places Circus Spider in the context of COVID-19-themed criminal activity, including ransomware campaigns during the pandemic. A separate mention references “January 2020 CIRCUS SPIDER’s NetWalker.” No additional aliases, sub-groups, or higher-confidence technical details beyond its association with NetWalker ransomware and hospital targeting are directly provided in the content.

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ARSENAL

Associated malware families

1 malware family attributed to this actor across reporting.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

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Target overlap

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Tradecraft mapping

Every observed MITRE ATT&CK technique, grouped by tactic.

Malware arsenal1

Families this actor is known to deploy, with IOCs and behavior.

Exploited CVEs

CVEs this actor has used in known campaigns.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Observables

Domains, IPs, and hashes tied to this actor, refreshed continuously.