Suspicious Linux CoinMiner Watchdog Staging in Shared Memory (via process_creation)

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1543.002Systemd Service
Priv Esc
- T1543.002Systemd Service
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a watchdog command that downloads the miner into a hidden .Sys_cache_backup file under dev shm using curl with a wget fallback as observed in the Linux SSH CoinMiner campaign. Fetching an executable into shared memory to survive removal is a hallmark of this miner.

Reporting behind it

Related detections9 linkedT1543.002 — drag to rearrange

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Malicious systemd-daemon Masquerading Binary Execution on Linux

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Suspicious Systemd Service Unit Written to System Directory (via process_creation)

Suspicious Linux CoinMiner Watchdog Staging in Shared Memory (via process_creation)

Pivot detection · T1543.002 · 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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