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SPAWNWAVE is an evolved implant utility in the SPAWN malware ecosystem. The content describes it as an evolved version of SPAWNANT that combines capabilities from other SPAWN components, and notes overlap with the publicly reported SPAWNCHIMERA and RESURGE malware families. It was observed alongside other SPAWN components including SPAWNSLOTH, used for log tampering, and SPAWNSNARE, a Linux utility that extracts an uncompressed Linux kernel image (vmlinux) and encrypts it using AES. Deployment of SPAWNWAVE was reported in post-exploitation activity following exploitation of CVE-2025-22457, a critical buffer overflow vulnerability affecting Ivanti Connect Secure (ICS) VPN appliances version 22.7R2.5 and earlier. The activity is attributed by Google Threat Intelligence Group to UNC5221, a suspected China-nexus espionage actor. High-confidence context indicates the malware was used in stealth-focused intrusions against Ivanti edge devices, with related tradecraft including attempts to evade detection by modifying Ivanti’s Integrity Checker Tool.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
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.
The actor also used other SPAWN components such as SPAWNSLOTH (log tampering), SPAWNSNARE (kernel image extraction and encryption), and SPAWNWAVE (an evolved implant utility). | On April 3, 2025, Ivanti disclosed a critical vulnerability, CVE-2025-22457, affecting Ivanti Connect Secure (ICS) VPN appliances version 22.7R2.5 and earlier. The flaw, initially underestimated as a denial-of-service risk, was later found to be a buffer overflow that allows remote code execution. Mandiant observed exploitation beginning in mid-March 2025...
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
The actor also used other SPAWN components such as SPAWNSLOTH (log tampering), SPAWNSNARE (kernel image extraction and encryption), and SPAWNWAVE (an evolved implant utility).
2 distinct techniques documented for this family, organized by ATT&CK tactic.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.