Suspicious React2Shell Cryptominer Masquerade and Crond Persistence on Linux

ATT&CK techniques

Execution → Impact

Recon
Resource Dev
Initial Access
Execution
- T1059Command and Scripting Interpreter
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1496Resource Hijacking

What it detects

This rule detects the post-exploitation persistence pattern where a UPX-packed XMRig cryptominer is launched with nohup from a temporary directory masquerading as a crond or systemd process following React2Shell CVE-2025-55182 compromise. Executing a background miner from a writable temporary path under a system-like name is a strong indicator of resource hijacking with evasion.

Reporting behind it

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Suspicious React2Shell Cryptominer Masquerade and Crond Persistence on Linux

Pivot detection · T1059 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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