You're reading from Incident Response Techniques for Ransomware Attacks Understand modern ransomware attacks and build an incident response strategy to work through them

Product type Paperback

Published in Apr 2022

Publisher Packt

ISBN-13 9781803240442

Length 228 pages

Edition 1st Edition

Concepts

Cybersecurity

Author (1):

Oleg Skulkin

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Table of Contents (17) Chapters

Preface

1. Section 1: Getting Started with a Modern Ransomware Attack

2. Chapter 1: The History of Human-Operated Ransomware Attacks FREE CHAPTER

3. Chapter 2: The Life Cycle of a Human-Operated Ransomware Attack

4. Chapter 3: The Incident Response Process

5. Section 2: Know Your Adversary: How Ransomware Gangs Operate

6. Chapter 4: Cyber Threat Intelligence and Ransomware

7. Chapter 5: Understanding Ransomware Affiliates' Tactics, Techniques, and Procedures

8. Chapter 6: Collecting Ransomware-Related Cyber Threat Intelligence

9. Section 3: Practical Incident Response

10. Chapter 7: Digital Forensic Artifacts and Their Main Sources

11. Chapter 8: Investigating Initial Access Techniques

12. Chapter 9: Investigating Post-Exploitation Techniques

13. Chapter 10: Investigating Data Exfiltration Techniques

14. Chapter 11: Investigating Ransomware Deployment Techniques

15. Chapter 12: The Unified Ransomware Kill Chain

16. Other Books You May Enjoy

Crylock ransomware overview

Before starting the encryption process, Crylock stops a number of services and kills a number of processes from a built-in list.

Then it removes shadow copies and backups to inhibit system recovery:

"C:\Windows\System32\cmd.exe" /c "vssadmin delete shadows /all /quiet" 
"C:\Windows\System32\cmd.exe" /c "wbadmin DELETE SYSTEMSTATEBACKUP -keepVersions:0" 
"C:\Windows\System32\cmd.exe" /c "wbadmin DELETE BACKUP -keepVersions:0" 
"C:\Windows\System32\cmd.exe" /c "wmic SHADOWCOPY DELETE" 
"C:\Windows\System32\cmd.exe" /c "bcdedit /set {default} recoveryenabled No" 
"C:\Windows\System32\cmd.exe" /c "bcdedit /set {default} bootstatuspolicy ignoreallfailures" 
vssadmin delete shadows /all /quiet 
wmic SHADOWCOPY DELETE

To encrypt files, it uses a custom symmetric cipher, and the RSA algorithm to encrypt the key.

Crylock drops a ransom...

The rest of the chapter is locked

You're reading from Incident Response Techniques for Ransomware Attacks Understand modern ransomware attacks and build an incident response strategy to work through them

Table of Contents (17) Chapters

Crylock ransomware overview

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You're reading from Incident Response Techniques for Ransomware Attacks Understand modern ransomware attacks and build an incident response strategy to work through them

Table of Contents (17) Chapters

Crylock ransomware overview

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