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Zorluk: KolayNetwork Security Monitoring and Alerting

A security technician is configuring network security monitoring rules to detect active compromises and data exfiltration. Which of the following observations represent valid network-level threat indicators that should trigger an immediate security alert? (Select TWO.)

  1. Outbound network flow logs showing persistent connection attempts to known malicious Command and Control (C2) IP addressesCevap
  2. Network Intrusion Detection System (NIDS) alerts identifying anomalous ICMP packet payloads containing encoded data transfers from an internal serverCevap
  3. C
    A honeypot decoy system inline-filtering and dropping inbound malicious traffic to protect production servers
  4. D
    Web application gateway logs marking an HTTP payload containing SQL database commands as a client-side Cross-Site Scripting attack

Cevap

The valid indicators of network-based compromise requiring alerts are persistent outbound connections to known Command and Control (C2) IP addresses and NIDS alerts identifying anomalous ICMP packet payloads carrying encoded data.
Outbound connection attempts to known Command and Control infrastructure and protocol anomalies like data-laden ICMP payloads represent real-time network layer telemetry indicating compromised internal assets and active tunneling, making both essential network alert triggers.

Adım Adım Çözüm

1
Evaluate network connection telemetry for outbound threat indicators
Persistent outbound traffic to known C2 addresses confirms active malware beaconing from internal hosts.
Compromised endpoints routinely initiate outbound sessions to external command infrastructure to receive instructions.
2
Analyze protocol payloads for covert channel activity
Anomalous ICMP packets carrying data payloads signal ICMP tunneling.
Standard ICMP traffic carries simple echo request/reply data; embedding arbitrary data payloads indicates protocol misuse for data exfiltration.

Anahtar Kavram

Network Security Monitoring and Alerting
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