cd00r
MITRE ATT&CK: S1204 View on attack.mitre.org
Aliases: cd00r
- First seen
- 2000-01-01 00:00:00
- Malware type
- backdoor
- Family
- Malware family
- Operating systems
- network-devices
- Profile updated
- 2026-07-07 14:23:27
Context
cd00r is an open-source backdoor for UNIX and UNIX-variant operating systems that was orginally released in 2000. cd00r source code is primarily based on a packet-capturing program as it utilizes a sniffer to listen for specific sequences of network traffic or "secret knock" before executing the attacker's code.
Detection coverage
- 21 Sigma rules
Malware & tools used
- Non-Application Layer Protocol (attack-pattern)
- System Network Configuration Discovery (attack-pattern)
- Network Sniffing (attack-pattern)
- Port Knocking (attack-pattern)
Used by threat actors
- J-magic Campaign (campaign)
Reports & references
- malpedia.caad.fkie.fraunhofer.de — Elf.Cd00R (report)
- github.com — Cd00R.C (report)
- giac.org — 103631 (report)
- blog.lumen.com — The J Magic Show Magic Packets And Where To Find Them (report)
- MITRE ATT&CK — S1204 (report)