PHASEJAM
Hunt this family in your stack
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
Vulnerabilities exploited
1 CVE Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.
"...installed by exploiting a zero-day vulnerability at that time, CVE-2025-0282, during attacks against organizations in Japan around December 2024..."; "CVE-2025-0282 refers to a critical security flaw in ICS that could allow unauthenticated remote code execution. It was addressed by Ivanti in early January 2025." | UNC5337 to deliver the SPAWN ecosystem of malware, as well as other tools like DRYHOOK and PHASEJAM.
Groups observed using it
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
UNC5337 to deliver the SPAWN ecosystem of malware, as well as other tools like DRYHOOK and PHASEJAM.
Techniques & procedures
7 distinct techniques documented for this family, organized by ATT&CK tactic.
Execution
2 techniquesLIGHTWIRE can imbed itself into the legitimate compcheckresult.cgi component of Ivanti Connect Secure VPNs to enable command execution.
Persistence
1 techniqueAPT5 has modified legitimate binaries and scripts for Pulse Secure VPNs including the legitimate DSUpgrade.pm file to install the ATRIUM webshell for persistence.
Stealth
2 techniquesThe content repeatedly describes adversaries using Base64, XOR, RC4, AES, hexadecimal encoding, string encryption, code flattening, custom crypters, and other obfuscation methods to hide payloads, strings, configuration data, URLs, and scripts.
Defense Impairment
1 techniquePHASEJAM 'has modified Ivanti Connect Secure appliances and blocks the system upgrades by altering the DSUpgrade.pm file'; SPAWNCHIMERA 'has modified the Ivanti Integrity Checker Tool to evade detection.'
Exfiltration
1 techniqueADVSTORESHELL exfiltrates data over the same channel used for C2. Agrius exfiltrated staged data using tools such as Putty and WinSCP, communicating with command and control servers. AppleSeed can exfiltrate files via the C2 channel.
Other
1 techniqueThe content repeatedly describes threat actors and malware disabling or modifying security tools, EDR/AV, logging, firewall rules, integrity checkers, and security settings; e.g., 'Agrius used several mechanisms to try to disable security tools' and 'BlackByte disabled security tools such as Windows Defender and the Raccine anti-ransomware tool during operations.'
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Tool/malware delivered in Ivanti Connect Secure exploitation activity alongside SPAWN; attribution not established in the referenced reporting.
Malware that modifies legitimate components on target systems to provide persistence, webshell access, upgrade blocking, and arbitrary command execution.
Malware that modifies Ivanti Connect Secure appliances and blocks upgrades by altering DSUpgrade.pm.
The version that knows your environment.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.