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Monaco is a previously undocumented Go 1.24.0 malware strain identified by Eclypsium on March 6, 2026. It is an SSH scanner, brute-force tool, and Monero cryptominer targeting Linux-based devices, including servers, routers, and IoT systems. Monaco scans the internet for exposed SSH services, brute-forces weak credentials to gain access, and deploys Monero cryptocurrency mining software on compromised hosts. Reported samples were compiled for ARM32, ARM64, and MIPS architectures, enabling targeting across routers, IoT devices, servers, and other vulnerable Linux systems. Eclypsium also reported that Monaco sends stolen SSH credentials to a command-and-control server hosted on Alibaba Cloud Singapore. At the time of reporting, Monaco had not previously been flagged on VirusTotal, ThreatFox, or Hybrid Analysis. The reporting places Monaco in the broader trend of financially motivated actors increasingly targeting network infrastructure historically associated with nation-state activity. High-confidence behavioral indicators from the content include internet-wide SSH scanning, brute-force login attempts against exposed SSH servers, Monero mining activity, unusual CPU utilization consistent with cryptomining, and outbound communication involving exfiltration of stolen SSH credentials to its command-and-control infrastructure.
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4 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.
A Go-based SSH scanner and cryptominer that brute-forces weak SSH credentials on servers, routers, and IoT devices, then deploys Monero mining software.
A Go-based cryptomining malware that scans for exposed SSH servers, brute-forces access, steals SSH credentials, sends them to a C2 server, and mines Monero on compromised Linux devices across multiple architectures.
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.