Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445.
Casky was already ahead
This CVE exploits attack patterns that Casky's 312matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
CVE-2024-27686 is a denial-of-service vulnerability affecting MikroTik RouterOS versions 6.40.5 through 6.49.10 on x86 architecture. An unauthenticated remote attacker can craft malicious SMB (Server Message Block) packets and send them to TCP port 445 to trigger a device crash, rendering the router unavailable. This impacts organizations relying on MikroTik devices for network infrastructure, particularly those exposing SMB services to untrusted networks. The vulnerability is particularly concerning because SMB is commonly enabled by default in many RouterOS deployments, creating a large attack surface for remote denial-of-service attacks.
Casky's 312 matched skills leverage Claude AI's extended reasoning capabilities to identify attack patterns associated with TA0040 (Impact) and TA0011 (Command and Control) techniques. Practitioners using Casky would detect malformed SMB protocol packets and abnormal service termination patterns that precede RouterOS crashes. The platform's skills correlate crafted packet sequences targeting port 445 with impact-based TTPs, enabling detection of reconnaissance probing and exploitation attempts. Security teams would observe findings highlighting suspicious SMB connection attempts, protocol anomalies, and device availability monitoring alerts—allowing them to distinguish between legitimate SMB traffic and weaponized packets designed to trigger the vulnerability before systems are compromised.
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These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2024-27686.
Casky has 312 skills that investigate the attack patterns behind CVE-2024-27686. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →analyzing-campaign-attribution-evidence
threat intelligence · low
analyzing-certificate-transparency-for-phishing
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auditing-tls-certificate-transparency-logs
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automating-ioc-enrichment
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building-adversary-infrastructure-tracking-system
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collecting-indicators-of-compromise
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collecting-open-source-intelligence
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collecting-threat-intelligence-with-misp
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collecting-volatile-evidence-from-compromised-host
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conducting-cloud-incident-response
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conducting-man-in-the-middle-attack-simulation
network security · medium
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conducting-pass-the-ticket-attack
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conducting-phishing-incident-response
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conducting-post-incident-lessons-learned
incident response · low
conducting-social-engineering-pretext-call
red teaming · high
conducting-spearphishing-simulation-campaign
red teaming · high
configuring-network-segmentation-with-vlans
network security · medium
configuring-pfsense-firewall-rules
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configuring-snort-ids-for-intrusion-detection
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containing-active-breach
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correlating-security-events-in-qradar
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correlating-threat-campaigns
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deobfuscating-javascript-malware
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deobfuscating-powershell-obfuscated-malware
malware analysis · medium
deploying-decoy-files-for-ransomware-detection
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ot ics security · medium
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detecting-command-and-control-over-dns
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detecting-exfiltration-over-dns-with-zeek
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detecting-kerberoasting-attacks
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detecting-modbus-command-injection-attacks
ot ics security · medium
detecting-modbus-protocol-anomalies
ot ics security · medium
detecting-network-anomalies-with-zeek
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detecting-ntlm-relay-with-event-correlation
threat hunting · low
detecting-pass-the-hash-attacks
threat hunting · low
detecting-port-scanning-with-fail2ban
network security · medium
detecting-privilege-escalation-attempts
threat hunting · low
detecting-process-hollowing-technique
threat hunting · low
detecting-process-injection-techniques
malware analysis · medium
detecting-ransomware-encryption-behavior
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detecting-ransomware-precursors-in-network
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detecting-rootkit-activity
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detecting-service-account-abuse
threat hunting · low
detecting-stuxnet-style-attacks
ot ics security · medium
detecting-suspicious-powershell-execution
threat hunting · low
detecting-t1003-credential-dumping-with-edr
threat hunting · low
detecting-t1055-process-injection-with-sysmon
threat hunting · low
detecting-t1548-abuse-elevation-control-mechanism
threat hunting · low
detecting-wmi-persistence
threat hunting · low
eradicating-malware-from-infected-systems
incident response · low
evaluating-threat-intelligence-platforms
threat intelligence · low
executing-red-team-engagement-planning
red teaming · high
exploiting-active-directory-certificate-services-esc1
red teaming · high
exploiting-active-directory-with-bloodhound
red teaming · high
exploiting-bgp-hijacking-vulnerabilities
network security · medium
exploiting-constrained-delegation-abuse
red teaming · high
exploiting-ipv6-vulnerabilities
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exploiting-kerberoasting-with-impacket
red teaming · high
exploiting-ms17-010-eternalblue-vulnerability
red teaming · high
exploiting-nopac-cve-2021-42278-42287
red teaming · high
exploiting-smb-vulnerabilities-with-metasploit
network security · medium
exploiting-zerologon-vulnerability-cve-2020-1472
red teaming · high
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hunting-advanced-persistent-threats
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hunting-for-anomalous-powershell-execution
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hunting-for-beaconing-with-frequency-analysis
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hunting-for-cobalt-strike-beacons
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hunting-for-command-and-control-beaconing
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threat hunting · low
hunting-for-data-staging-before-exfiltration
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hunting-for-dcom-lateral-movement
threat hunting · low
hunting-for-dcsync-attacks
threat hunting · low
hunting-for-defense-evasion-via-timestomping
threat hunting · low
hunting-for-dns-based-persistence
threat hunting · low
hunting-for-dns-tunneling-with-zeek
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hunting-for-domain-fronting-c2-traffic
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hunting-for-lateral-movement-via-wmi
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threat hunting · low
hunting-for-living-off-the-land-binaries
threat hunting · low
hunting-for-lolbins-execution-in-endpoint-logs
threat hunting · low
hunting-for-ntlm-relay-attacks
threat hunting · low
hunting-for-persistence-mechanisms-in-windows
threat hunting · low
hunting-for-persistence-via-wmi-subscriptions
threat hunting · low
hunting-for-process-injection-techniques
threat hunting · low
hunting-for-registry-persistence-mechanisms
threat hunting · low
hunting-for-registry-run-key-persistence
threat hunting · low
hunting-for-scheduled-task-persistence
threat hunting · low
hunting-for-shadow-copy-deletion
threat hunting · low
hunting-for-spearphishing-indicators
threat hunting · low
hunting-for-startup-folder-persistence
threat hunting · low
hunting-for-supply-chain-compromise
threat hunting · low
hunting-for-suspicious-scheduled-tasks
threat hunting · low
hunting-for-t1098-account-manipulation
threat hunting · low
hunting-for-unusual-network-connections
threat hunting · low
hunting-for-unusual-service-installations
threat hunting · low
hunting-for-webshell-activity
threat hunting · low
implementing-alert-fatigue-reduction
soc operations · low
implementing-anti-ransomware-group-policy
ransomware defense · medium
implementing-bgp-security-with-rpki
network security · medium
implementing-browser-isolation-for-zero-trust
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implementing-conduit-security-for-ot-remote-access
ot ics security · medium
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implementing-diamond-model-analysis
threat intelligence · low
implementing-dragos-platform-for-ot-monitoring
ot ics security · medium
implementing-honeypot-for-ransomware-detection
ransomware defense · medium
implementing-ics-firewall-with-tofino
ot ics security · medium
implementing-iec-62443-security-zones
ot ics security · medium
implementing-immutable-backup-with-restic
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soc operations · low
implementing-nerc-cip-compliance-controls
ot ics security · medium
implementing-network-access-control
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ot ics security · medium
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implementing-siem-use-cases-for-detection
soc operations · low
implementing-soar-automation-with-phantom
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soc operations · low
implementing-stix-taxii-feed-integration
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implementing-taxii-server-with-opentaxii
threat intelligence · low
implementing-threat-intelligence-lifecycle-management
threat intelligence · low
implementing-threat-modeling-with-mitre-attack
soc operations · low
implementing-ticketing-system-for-incidents
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implementing-velociraptor-for-ir-collection
incident response · low
investigating-insider-threat-indicators
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investigating-phishing-email-incident
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managing-intelligence-lifecycle
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mapping-mitre-attack-techniques
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monitoring-darkweb-sources
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performing-active-directory-bloodhound-analysis
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performing-alert-triage-with-elastic-siem
soc operations · low
performing-arp-spoofing-attack-simulation
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incident response · low
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network security · medium
performing-dynamic-analysis-with-any-run
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performing-ics-asset-discovery-with-claroty
ot ics security · medium
performing-indicator-lifecycle-management
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red teaming · high
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incident response · low
performing-ioc-enrichment-automation
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performing-ip-reputation-analysis-with-shodan
threat intelligence · low
performing-kerberoasting-attack
red teaming · high
performing-lateral-movement-detection
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performing-lateral-movement-with-wmiexec
red teaming · high
performing-log-source-onboarding-in-siem
soc operations · low
performing-malware-hash-enrichment-with-virustotal
threat intelligence · low
performing-malware-ioc-extraction
threat intelligence · low
performing-malware-triage-with-yara
malware analysis · medium
performing-memory-forensics-with-volatility3-plugins
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ot ics security · medium
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performing-ssl-stripping-attack
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performing-vlan-hopping-attack
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triaging-security-alerts-in-splunk
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triaging-security-incident
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triaging-security-incident-with-ir-playbook
incident response · low
validating-backup-integrity-for-recovery
incident response · low
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