Suspicious Cron Persistence File Created in System Cron Directories

ATT&CK techniques

Execution → Priv Esc

Recon
Resource Dev
Initial Access
Execution
- T1053.003Cron
Persistence
- T1053.003Cron
Priv Esc
- T1053.003Cron
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a file named 0anacron inside the system cron directories which the DripDropper Linux malware uses to masquerade as a trusted periodic job and establish scheduled task persistence. Placing a script among legitimate cron jobs lets the malware re execute and survive reboots. Detecting this file write surfaces persistence establishment on compromised Linux hosts.

Reporting behind it

Related detections9 linkedT1053.003 — drag to rearrange

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Suspicious Cron Persistence Installing a Downloader via Command Line

Suspicious Cron Persistence File Creation in System Cron Directories (via file_event)

Suspicious Cron Persistence via etc cron.d tsar (via file_event)

Suspicious Cron Job Executing Binary From var tmp via Process Creation

Suspicious Cron Job Persistence Creation on Linux (via process_creation)

Linux eBPF Backdoor File Persistence via cron.d and sudoers.d (ebpfbackdoor)

Suspicious Cron Persistence File Created in System Cron Directories

Pivot detection · T1053.003 · 9 related

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