Full Report
With ransomware attacks on the rise, companies need to take a proactive approach to security. Group-IB has put together a list of actionable tips to help you protect your organization from the ransomware threats in 2022.
Analysis Summary
# Best Practices: Ransomware Prevention and Mitigation (2022 Focus)
## Overview
These practices address the evolving ransomware landscape, specifically targeting the shift toward remote work vulnerabilities, the exploitation of public-facing assets, and the weaponization of legitimate administrative and penetration testing tools by threat actors.
## Key Recommendations
### Immediate Actions
1. **Audit Backups for Immutability:** Ensure backups are stored offline or in a segmented, immutable environment. Attackers target Windows shadow copies in 89% of incidents; these cannot be your only recovery option.
2. **External Attack Surface Scan:** Identify all public-facing applications and prioritize patching for those with known, actively exploited vulnerabilities.
3. **Disable/Restrict Administrative Tools:** Audit the use of `ProcDump` and similar utilities. If not required for daily operations, block their execution to prevent credential dumping (specifically targeting `lsass.exe`).
### Short-term Improvements (1-3 months)
1. **Remote Worker Security:** Implement advanced Business Email Protection (BEP) and Multi-Factor Authentication (MFA) to counter the rise in spear-phishing and malvertising targeting home users.
2. **Legitimate Software Monitoring:** Develop detection rules for the misuse of remote access software (e.g., AnyDesk, TeamViewer) and administrative tools that are being co-opted by ransomware affiliates.
3. **Credential Protection:** Implement protections for `lsass.exe` to prevent memory dumping, a technique found in nearly one-third of all ransomware incidents.
### Long-term Strategy (3+ months)
1. **Managed Detection and Response (XDR):** Deploy XDR or EDR solutions capable of identifying "living-off-the-land" techniques and the presence of frameworks like Cobalt Strike.
2. **Compromise Assessments:** Regularly perform assessments to ensure that even if patching is current, there are no "dormant" infections from historical vulnerabilities.
3. **Unified Risk Management:** Shift toward an intelligence-driven security posture that integrates threat intelligence with attack surface management to anticipate affiliate movements.
## Implementation Guidance
### For Small Organizations
* **Prioritize Backups:** Focus on a simple "3-2-1" backup strategy with at least one copy completely disconnected from the network.
* **Email Security:** Use cloud-based email security filters to reduce the burden of phishing on remote staff.
### For Medium Organizations
* **Vulnerability Management:** Move beyond simple scanning to a risk-based patching program that prioritizes public-facing applications over internal systems.
* **EDR Configuration:** Configure Endpoint Detection and Response tools to alert on the execution of common red-team tools like Cobalt Strike.
### For Large Enterprises
* **Proactive Hunting:** Utilize Threat Intelligence to hunt for specific ransomware affiliate TTPs (Tactics, Techniques, and Procedures) within the network.
* **Red/Purple Teaming:** Conduct regular exercises but ensure there is a clear mechanism to distinguish legitimate authorized testing from unauthorized attacker activity.
## Configuration Examples
* **Tool Monitoring:** Configure SIEM/EDR to alert on specific process executions:
* **Process:** `procdump.exe`
* **Target:** `lsass.exe`
* **Action:** Block or Alert (High Severity).
* **Beacon Detection:** Implement network-level signatures to detect **Cobalt Strike Beacon** heartbeats (identified in 57% of investigated attacks).
## Compliance Alignment
* **NIST Cybersecurity Framework (CSF):** Aligns with *Protect* (Data Security/Maintenance) and *Recover* (Recovery Planning).
* **CIS Controls:** Specifically Control 11 (Data Recovery) and Control 7 (Vulnerability Management).
* **ISO/IEC 27001:** A.12.6.1 (Management of technical vulnerabilities).
## Common Pitfalls to Avoid
* **Assuming Patched means Safe:** Failing to check for persistence or historical compromise after patching a public-facing application.
* **Over-reliance on Shadow Copies:** Relying on Windows-native recovery tools which are frequently deleted or encrypted by modern ransomware (89% failure rate).
* **Ignoring "Gray" Tools:** Ignoring the presence of legitimate admin tools like remote desktop software, assuming they are being used by internal IT staff.
## Resources
* **Group-IB Unified Risk Platform:** [https://www.group-ib[.]com/products/unified-risk-platform/]
* **Attack Surface Management:** [https://www.group-ib[.]com/products/attack-surface-management/]
* **Incident Response Readiness Assessment:** [https://www.group-ib[.]com/services/incident-response-readiness-assessment/]
* **MITRE ATT&CK Framework:** Guidance on detecting Cobalt Strike and ProcDump misuse.