MikeGPT CyberSecurity

# Actionable Guidance for AppOmni # Generated: 2026-01-14 11:39:50 # Step 1: Navigate to Posture → Policies → Library → Filter by 'ServiceNow' and Source 'AO Labs' # Purpose: Enable specific detection policies for CVE-2025-12420 released by AppOmni Labs. These policies specifically target misconfigured ACLs and public access settings related to ServiceNow AI/Now Assist components. # Expected: Activation of targeted policy checks that will flag instances where the vulnerable AI components are exposed to unauthenticated users. # Step 2: Navigate to Threat Detection → Events → Filter by Event Type 'Impersonation' AND Service 'ServiceNow' # Purpose: Investigate logs for unauthorized user impersonation attempts, which is the primary exploit vector of this CVE. Look for anomalies where 'System' or 'Guest' accounts initiate impersonation of privileged users. # Expected: Identification of any historical or active exploitation attempts where the AI flaw was used to bypass authentication controls. # Step 3: Navigate to Posture → Inventory → Data Access → Public Access # Purpose: Audit public-facing widgets and API endpoints. Specifically, search for 'sn_now_assist' or AI-related tables to ensure the vulnerability has not resulted in unintentional data exposure. # Expected: A list of publicly accessible resources. Success is achieved when no AI-related tables or processors appear in the 'Public' or 'Guest' access lists. # Verification Steps: # - Trigger a manual policy scan via Posture → Overview → Scan Now # Expected: The specific AO Labs policy for CVE-2025-12420 returns a 'Passed' status, confirming that the ServiceNow instance configuration no longer exposes the vulnerable AI endpoints. # - Review Threat Detection Rule Status in Settings → Rules # Expected: Verify that 'ServiceNow - Suspicious Impersonation' and 'ServiceNow - Anomalous Unauthenticated Access' rules are set to 'Enabled' and 'High Severity'.

rule Ni8mare_Malware_Detection { meta: description = "Detects Ni8mare malware associated with Fortinet exploitation (CVE-2026-21858)" author = "Threat Rundown" date = "2026-01-15" reference = "https://www.securityweek.com/?p=44951" severity = "high" tlp = "white" strings: $s1 = "Ni8mare" ascii wide $s2 = "/v1/webhook" ascii wide $s3 = "FortiSIEM_Exploit" ascii wide $h1 = { 4D 5A 90 00 03 00 00 00 04 00 00 00 FF FF 00 00 } condition: uint16(0) == 0x5A4D and (any of ($s*) or $h1) }

index=security sourcetype="fortinet:firewall" OR sourcetype="fortinet:fortisiem" uri_path="/v1/webhook" OR threat_name="Ni8mare" | eval risk_score=case( uri_path=="/v1/webhook" AND action=="allowed", 100, threat_name=="Ni8mare", 100, 1==1, 25) | where risk_score >= 50 | table _time, src_ip, dest_ip, uri_path, action, risk_score | sort -_time

$computers = "localhost", "SERVER01", "WKSTN01" foreach ($computer in $computers) { if (Test-Connection -ComputerName $computer -Count 1 -Quiet) { Write-Host "Checking Node.js version on $computer..." Invoke-Command -ComputerName $computer -ScriptBlock { try { $nodeVer = node --version Write-Output "Node.js Version: $nodeVer" } catch { Write-Output "Node.js not found or error querying version." } } } }