Malicious Cryptominer Staging Files Dropped in tmp Directory

ATT&CK techniques

Defense Evasion → Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1564.001Hidden Files and Directories
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1496Resource Hijacking

What it detects

This rule detects references to hidden cryptominer staging files written under /tmp such as .solr, kdevtmpfsi, zzz and .ICEd-unix. These paths were used across the Summer 2023 cryptojacking campaigns tracked by Wiz Research to drop XMRig and CCminer payloads, and their presence indicates resource-hijacking activity on a compromised host.

Reporting behind it

Related detections9 linkedT1496 — drag to rearrange

Suspicious Executable Written to User Documents Subfolder (via file_event)

Malicious Hadooken Cryptominer Execution via Masqueraded Binaries (via process_creation)

Suspicious Sobolan Staging Directory Creation in var tmp (via file_event)

Suspicious Lucifer Botnet Mining Pool Domain Resolution (via dns_query)

Suspicious Proxyjacking Service Resolution Observed in perfctl Campaign (via dns_query)

Malicious PureMiner Persistence Executable in AppData HResult Folder

Suspicious T-Rex CoinMiner Binaries in Windows NT Program Files Folder (via file_event)

Malicious Cryptocurrency Miner Execution (via process_creation)

Possible Cryptomining Beacon to c3pool Mining Domain

Malicious Cryptominer Staging Files Dropped in tmp Directory

Pivot detection · T1496 · 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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