IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential Reverse Shell Activity via Terminaledit
Identifies the execution of a shell process with suspicious arguments which may be indicative of reverse shell activity.
Rule type: eql
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: high
Risk score: 73
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Linux
- macOS
- Threat Detection
- Execution
Version: 4 (version history)
Added (Elastic Stack release): 7.12.0
Last modified (Elastic Stack release): 8.4.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
process where event.type in ("start", "process_started") and
process.name in ("sh", "bash", "zsh", "dash", "zmodload") and
process.args : ("*/dev/tcp/*", "*/dev/udp/*", "*zsh/net/tcp*",
"*zsh/net/udp*") and /* noisy FPs */ not (process.parent.name :
"timeout" and process.executable : "/var/lib/docker/overlay*") and
not process.command_line : ("*/dev/tcp/sirh_db/*",
"*/dev/tcp/remoteiot.com/*", "*dev/tcp/elk.stag.one/*",
"*dev/tcp/kafka/*", "*/dev/tcp/$0/$1*", "*/dev/tcp/127.*",
"*/dev/udp/127.*", "*/dev/tcp/localhost/*") and not
process.parent.command_line : "runc init"
Threat mappingedit
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/
Rule version historyedit
- Version 4 (8.4.0 release)
-
-
Updated query, changed from:
process where event.type in ("start", "process_started") and process.name in ("sh", "bash", "zsh", "dash", "zmodload") and process.args:("*/dev/tcp/*", "*/dev/udp/*", "zsh/net/tcp", "zsh/net/udp")
-
- Version 2 (8.2.0 release)
-
- Formatting only