Network Connection via Signed Binary
editNetwork Connection via Signed Binary
editBinaries signed with trusted digital certificates can execute on Windows systems protected by digital signature validation. Adversaries may use these binaries to live off the land and execute malicious files that could bypass application allowlists and signature validation.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Defense Evasion
Version: 5 (version history)
Added (Elastic Stack release): 7.6.0
Last modified (Elastic Stack release): 7.10.0
Rule authors: Elastic
Rule license: Elastic License
Rule query
editsequence by process.entity_id [process where (process.name : "expand.exe" or process.name : "extrac.exe" or process.name : "ieexec.exe" or process.name : "makecab.exe") and event.type == "start"] [network where (process.name : "expand.exe" or process.name : "extrac.exe" or process.name : "ieexec.exe" or process.name : "makecab.exe") and not cidrmatch(destination.ip, "10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16")]
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Signed Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Signed Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
Rule version history
edit- Version 5 (7.10.0 release)
-
-
Updated query, changed from:
event.category:network and event.type:connection and process.name:(expand.exe or extrac.exe or ieexec.exe or makecab.exe) and not destination.ip:(10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16)
-
- Version 4 (7.9.1 release)
-
- Formatting only
- Version 3 (7.9.0 release)
-
-
Updated query, changed from:
process.name:(expand.exe or extrac.exe or ieexec.exe or makecab.exe) and event.action:"Network connection detected (rule: NetworkConnect)" and not destination.ip:(10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16)
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- Version 2 (7.7.0 release)
-
-
Updated query, changed from:
(process.name:expand.exe or process.name:extrac.exe or process.name:ieexec.exe or process.name:makecab.exe) and event.action:"Network connection detected (rule: NetworkConnect)" and not destination.ip:10.0.0.0/8 and not destination.ip:172.16.0.0/12 and not destination.ip:192.168.0.0/16
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