DRYHOOK
MITRE ATT&CK: S9013 View on attack.mitre.org
Aliases: DRYHOOK
- First seen
- 2025-01-01 00:00:00
- Malware type
- credential-stealer
- Family
- Malware family
- Operating systems
- linux, network-devices
- Profile updated
- 2026-07-07 15:29:42
Targeted industries: government-and-public-sector technology-and-telecommunications
Context
DRYHOOK is Python script used to steal credentials. DRYHOOK was first reported in January 2025, and has previously been leveraged by People's Republic of China (PRC) state-affiliated threat actors identified as UNC5221 and SYLVANITE.
Detection coverage
- 202 Sigma rules
Malware & tools used
- Linux and Mac Permissions (attack-pattern)
- Keylogging (attack-pattern)
- Local Data Staging (attack-pattern)
- Network Device CLI (attack-pattern)
- Modify System Image (attack-pattern)
- Disable or Modify Tools (attack-pattern)
- Encrypted/Encoded File (attack-pattern)
- Modify Authentication Process (attack-pattern)
- Python (attack-pattern)
- Service Stop (attack-pattern)
- Network Device Authentication (attack-pattern)
Exploited vulnerabilities
- CVE-2025-22457 (vulnerability)
Reports & references
- hub.dragos.com — 2026 Yir Executivebriefing%20O G (report)
- picussecurity.com — Unc5221 Cve 2025 22457 Ivanti Connect Secure (report)
- MITRE ATT&CK — S9013 (report)
- cloud.google.com — Ivanti Connect Secure Vpn Zero Day (report)