MikeGPT CyberSecurity

# Actionable Guidance for Nucleus Security # Generated: 2026-01-27 16:09:47 # Step 1: Navigate to Automation → Finding Processing → Add Rule # Purpose: Automate the prioritization of CISA KEV flaws to replicate risk-based prioritization workflows. # Expected: A new automation rule is created where Criteria is set to 'Threat Intelligence' contains 'CISA KEV', and Actions are set to 'Set Severity: Critical' and/or 'Set Due Date: 14 Days from Discovery' to align with federal mandates. # Step 2: Navigate to Vulnerabilities → Active → Filter Panel (Left) → Threat Intelligence # Purpose: Gain immediate visibility into existing exposure to Known Exploited Vulnerabilities. # Expected: Select 'CISA KEV' checkbox. The grid filters to show only vulnerabilities currently listed in the CISA catalog. Click 'Save View' and name it 'CISA KEV Watchlist' for one-click access. # Step 3: Navigate to Project Administration → Risk Scoring → Threat Intelligence # Purpose: Adjust the risk scoring algorithm to weight exploited vulnerabilities higher, similar to the legacy Kenna Risk Score. # Expected: Increase the multiplier or weight for 'Exploit Available' and 'In the Wild' attributes to ensure the Nucleus Asset and Vulnerability scores reflect the urgency of the CISA KEV catalog. # Verification Steps: # - Ingest a new scan file or trigger a connector sync containing a known CISA KEV vulnerability (e.g., CVE-2023-20198). # Expected: The vulnerability appears in the 'Active Vulnerabilities' list with 'Critical' severity and the specific Due Date defined in the automation rule, overriding the scanner's native severity. # - Navigate to Dashboard → Overview and review the 'Risk Score' trend. # Expected: Assets containing CISA KEV vulnerabilities should show a distinct spike in Risk Score (0-1000 scale) reflecting the adjusted Risk Scoring profile weights.

rule Malware_Mutagen_Linux_Exploit { meta: description = "Detects Mutagen malware artifacts associated with recent CISA KEV Linux exploits" author = "Threat Rundown" date = "2026-01-27" reference = "https://securityaffairs.com/?p=187375" severity = "high" tlp = "white" strings: $s1 = "Mutagen" ascii wide $s2 = "/bin/busybox" ascii $s3 = "exploit_telnet" ascii $h1 = { 7f 45 4c 46 01 01 01 00 } condition: ($h1 at 0) and (any of ($s*)) }

index=security sourcetype="nessus:scan" OR sourcetype="qualys:hostDetection" (cve="CVE-2025-52691" OR cve="CVE-2026-23760" OR cve="CVE-2026-21509" OR cve="CVE-2018-14634" OR cve="CVE-2026-24061" OR cve="CVE-2026-24002") | eval risk_score=case( cve=="CVE-2026-24002", 100, match(cve, "CVE-2025-52691"), 90, 1==1, 70) | table _time, dest_ip, hostname, cve, cvss, risk_score | sort -risk_score

$computers = "localhost", "SERVER01", "WKSTN01" foreach ($computer in $computers) { if (Test-Connection -ComputerName $computer -Count 1 -Quiet) { # Check for Grist service or process presence $process = Get-Process -Name "grist-core", "node" -ErrorAction SilentlyContinue -ComputerName $computer if ($process) { Write-Host "[ALERT] Potential Grist-Core instance found on $computer. Verify version for CVE-2026-24002." -ForegroundColor Red } else { Write-Host "No Grist process detected on $computer." -ForegroundColor Green } } }