LITTLELAMB.WOOLTEA
MITRE ATT&CK: S1121 View on attack.mitre.org
Aliases: LITTLELAMB.WOOLTEA
- First seen
- 2023-08-01 00:00:00
- Malware type
- backdoor
- Family
- Malware family
- Operating systems
- network-devices
- Profile updated
- 2026-07-07 13:13:12
Targeted industries: government-and-public-sector technology-and-telecommunications
Context
LITTLELAMB.WOOLTEA is a backdoor that was used by UNC5325 during Cutting Edge to deploy malware on targeted Ivanti Connect Secure VPNs and to establish persistence across system upgrades and patches.
Detection coverage
- 91 Sigma rules
Malware & tools used
- Non-Application Layer Protocol (attack-pattern)
- Proxy (attack-pattern)
- Asymmetric Cryptography (attack-pattern)
- Compromise Host Software Binary (attack-pattern)
- Create or Modify System Process (attack-pattern)
- File and Directory Discovery (attack-pattern)
- System Information Discovery (attack-pattern)
Used by threat actors
- Cutting Edge (campaign)
Reports & references
- Mandiant — Investigating Ivanti Exploitation Persistence (report)
- MITRE ATT&CK — S1121 (report)