IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential JAVA/JNDI Exploitation Attempt
editPotential JAVA/JNDI Exploitation Attempt
editIdentifies an outbound network connection by JAVA to LDAP, RMI or DNS standard ports followed by a suspicious JAVA child processes. This may indicate an attempt to exploit a JAVA/NDI (Java Naming and Directory Interface) injection vulnerability.
Rule type: eql
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
- https://www.lunasec.io/docs/blog/log4j-zero-day/
- https://github.com/christophetd/log4shell-vulnerable-app
- https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE.pdf
- https://www.elastic.co/security-labs/detecting-log4j2-with-elastic-security
- https://www.elastic.co/security-labs/analysis-of-log4shell-cve-2021-45046
Tags:
- Elastic
- Host
- Linux
- macOS
- Threat Detection
- Execution
Version: 101
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editsequence by host.id with maxspan=1m
[network where event.action == "connection_attempted" and
process.name : "java" and
/*
outbound connection attempt to
LDAP, RMI or DNS standard ports
by JAVA process
*/
destination.port in (1389, 389, 1099, 53, 5353)] by process.pid
[process where event.type == "start" and
/* Suspicious JAVA child process */
process.parent.name : "java" and
process.name : ("sh",
"bash",
"dash",
"ksh",
"tcsh",
"zsh",
"curl",
"perl*",
"python*",
"ruby*",
"php*",
"wget")] by process.parent.pid
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
-
Sub-technique:
- Name: JavaScript
- ID: T1059.007
- Reference URL: https://attack.mitre.org/techniques/T1059/007/
-
Technique:
- Name: Exploitation for Client Execution
- ID: T1203
- Reference URL: https://attack.mitre.org/techniques/T1203/