Elastic: Auditd für alle

A presentation at IT Tage in December 2018 in Frankfurt, Germany by Philipp Krenn

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Learn about a breach From the press or users

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Learn about a breach Attackers asking for a ransom

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Learn about a breach Cloud provider's bill

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Learn about a breach Yourself after the fact

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Learn about a breach Yourself but unsure about harm

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Learn about a breach Yourself & you can prove no harm

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No silver bullet

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uditd https://github.com/linux-audit

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"auditd is the userspace component to the Linux Auditing System. It's responsible for writing audit records to the disk. Viewing the logs is done with the ausearch or aureport utilities."

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Monitor File and network access System calls Commands run by a user Security events

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https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/security_guide/chap-system_auditing

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Demo

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Understanding Logs https://access.redhat.com/documentation/en-us/ red_hat_enterprise_linux/7/html/security_guide/secunderstanding_audit_log_files

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More Rules https://github.com/linux-audit/audit-userspace/tree/master/rules

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Namespaces WIP https://github.com/linux-audit/audit-kernel/issues/ 32#issuecomment-395052938

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Problem How to centralize?

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Developer

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Disclaimer I build highly monitored Hello World apps

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Filebeat Module: Auditd

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Demo

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!

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!"

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https://cloud.elastic.co

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Auditbeat

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Auditd Module Correlate related events Resolve UIDs to user names Native Elasticsearch integration

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Auditd Module eBPF powers on older kernels Easier configuration Written in Golang

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Docker metadata enrichment

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Demo

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File Integrity Module inotify (Linux) fsevents (macOS) ReadDirectoryChangesW (Windows)

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hash_types blake2b_256, blake2b_384, blake2b_512, md5, sha1, sha224, sha256, sha384, sha512, sha512_224, sha512_256, sha3_224, sha3_256, sha3_384, sha3_512, xxh64

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Demo

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Conclusion

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Auditd Auditbeat Logs, Dashboards,...

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Try https://dashboard.xeraa.wtf SSH: elastic-user@xeraa.wtf secret

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Code https://github.com/xeraa/ auditbeat-in-action

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Questions? Philipp Krenn PS: Sticker @xeraa