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KULIAH 12 INCIDENT RESPONSE (dirangkum dari buku Incident Response: A strategic Guide to Handling System and Network Security) Aswin Suharsono KOM 15008.

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Presentation on theme: "KULIAH 12 INCIDENT RESPONSE (dirangkum dari buku Incident Response: A strategic Guide to Handling System and Network Security) Aswin Suharsono KOM 15008."— Presentation transcript:

1 KULIAH 12 INCIDENT RESPONSE (dirangkum dari buku Incident Response: A strategic Guide to Handling System and Network Security) Aswin Suharsono KOM Keamanan Jaringan 2012/2013 KOM Keamanan Jaringan 2012/2013

2 Definisi Incident: event (kejadian) yang mengancam keamanan sistem komputer dan jaringan. Event adalah semua hal yang bisa diobservasi (diukur) Contoh event: connect ke sistem lain dalam jaringan, mengakses file, mengirim paket, sistem shutdown, dsb. Event yang mengancam antara lain, system crashes, packet flood, penggunaan akun oleh orang yang tidak berhak, web deface, bencana alam, dan hal-hal lain yang membahayakan kinerja sistem

3 Incident Types CIA related incidents: – Confidentiality: Upaya masuk ke dalam sistem rahasia militer – Integrity – Availability Other Types – Reconnaissance Attacks – Repudiation Someone takes action and denies it later on.

4 Kenapa perlu incident response? Bagi Organisasi  Respon yang sistematis terhadap insiden  Recover quickly  Mencegah insiden serupa di masa depan  Menyiapkan langkah-langkah yang berkaitan dengan hukum

5 Incident Response Scope Technical: – Incident detection and investigation tools and procedures Management-related – Policy – Formation of incident response capability In-house vs. out-sourced

6 Incident Handling Containment, Eradication and Recovery Post-incident activity Detection and Analysis Preparation

7 PDCERF incident response method

8 Preparation

9 Incident Handling: Preparation Incident Handler Communications and Facilities – Contact information On-call information for other teams within the organization, including escalation information Incident reporting mechanisms – Pagers or cell phones to be carried by team members for off-hour support, onsite communications – Encryption software – War room for central communication and coordination – Secure storage facility for securing evidence and other sensitive materials

10 Incident Handling: Preparation Incident Analysis Hardware and Software – Computer forensic workstations and/or backup devices to create disk images, preserve log files, and save other relevant incident data – Blank portable media – Easily portable printer – Packet sniffers and protocol analyzers – Computer forensic software – Floppies and CDs with trusted versions of programs to be used to gather evidence from systems – Evidence gathering accessories hard-bound notebooks digital cameras audio recorders chain of custody forms evidence storage bags and tags evidence tape

11 Incident Handling: Preparation Incident Analysis Resources – Port lists, including commonly used ports and Trojan horse ports – Documentation for OSs, applications, protocols, and intrusion detection and antivirus signatures – Network diagrams and lists of critical assets, such as Web, , and File Transfer Protocol (FTP) servers – Baselines of expected network, system and application activity – Cryptographic hashes of critical files to speed the analysis, verification, and eradication of incidents

12 Incident Handling: Preparation Incident Mitigation Software – Media, including OS boot disks and CD-ROMs, OS media, and application media – Security patches from OS and application vendors – Backup images of OS, applications, and data stored on secondary media

13 Incident Handling: Detection and Analysis Incident Categories – Denial of Service – Malicious code – Unauthorized access – Inappropriate usage – Multiple component incidents

14 Incident Handling: Detection and Analysis Signs of an incident – Intrusion detection systems – Antivirus software – Log analyzers – File integrity checking – Third-party monitoring of critical services Incident indications vs. precursors – Precursor is a sign that an incident may occur in the future E.g. scanning – Indication is a sign that an incident is occurring or has occurred

15 Incident Handling: Detection and Analysis Incident documentation – If incident is suspected, start recording facts Incident Prioritization based on – Current and potential technical effects – Criticality of affected resources Incident notification – CIO – Head of information system – Local information security officer – Other incident teams – Other agency departments such as HR, public affairs, legal department

16 Incident Handling: Containment, Eradication, Recovery Containment strategies – Vary based on type of incident – Criteria for choosing strategy include Potential damage / theft of resources Need for evidence information Service availability Resource consumption of strategy Effectiveness of strategy Duration of solution

17 Incident Handling: Containment, Eradication, Recovery Evidence gathering – For incident analysis – For legal proceedings Chain of custody Authentication of evidence

18 Incident Handling: Containment, Eradication, Recovery Attacker identification – Validation of attacker IP address – Scanning attacker’s system – Research attacker through search engines – Using Incident Databases – Monitoring possible attacker communication channels

19 Incident Handling: Containment, Eradication, Recovery Eradication – Deleting malicious code – Disabling breached user accounts Recovery – Restoration of system(s) to normal operations Restoring from clean backups Rebuilding systems from scratch Replacing compromised files Installing patches Changing passwords Tighten perimeter security Strengthen logging

20 Incident Handling: Post-Incident Activity Evidence Retention – Prosecution of attacker – Data retention policies – Cost

21 That’s All


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