PHASEJAM
MITRE ATT&CK: S9014 View on attack.mitre.org
Aliases: PHASEJAM
- Malware type
- dropper
- Family
- Malware family
- Operating systems
- linux, network-devices
- Profile updated
- 2026-07-07 15:29:45
Targeted industries: government-and-public-sector technology-and-telecommunications
Context
PHASEJAM is a dropper written as a bash shell script that modifies Ivanti Connect Secure appliance components. PHASEJAM was first reported in January 2025. PHASEJAM has previously been leveraged by People's Republic of China (PRC)- affiliated actors identified as UNC5221 and SYLVANITE.
Detection coverage
- 326 Sigma rules
Malware & tools used
- Compromise Host Software Binary (attack-pattern)
- Service Stop (attack-pattern)
- Deobfuscate/Decode Files or Information (attack-pattern)
- Rename Legitimate Utilities (attack-pattern)
- Command Obfuscation (attack-pattern)
- Delay Execution (attack-pattern)
- Data Manipulation (attack-pattern)
- Encrypted/Encoded File (attack-pattern)
- Ingress Tool Transfer (attack-pattern)
- Web Shell (attack-pattern)
- Modify or Spoof Tool UI (attack-pattern)
- Disable or Modify Tools (attack-pattern)
- Unix Shell Configuration Modification (attack-pattern)
- Network Device CLI (attack-pattern)
- Exfiltration Over C2 Channel (attack-pattern)
Reports & references
- hub.dragos.com — 2026 Yir Executivebriefing%20O G (report)
- cloud.google.com — Ivanti Connect Secure Vpn Zero Day (report)
- MITRE ATT&CK — S9014 (report)