Explanation:
Select the command that generated the output in tab 1:
* netstat -bo
Select the command that generated the output in tab 2:
* tasklist
Identify the file responsible for the malicious behavior:
* cmd.exe
Select the command that generated the output in tab 1: The output in tab 1 displays active network connections, which can be generated using the netstat command with options to display the owning process ID.
Select the command that generated the output in tab 1:
* netstat -bo
Select the command that generated the output in tab 2: The output in tab 2 lists the running processes with their PIDs and memory usage, which can be generated using the tasklist command.
Select the command that generated the output in tab 2:
* tasklist
Identify the file responsible for the malicious behavior: To identify the malicious file, we compare the hashes of the current files against the baseline hashes. From the provided data:
* The hash for cmd.exe in the current state (tab 3) is 372ab227fd5ea779c211a1451881d1e1.
* The baseline hash for cmd.exe (tab 4) is a2cdef1c445d3890cc3456789058cd21.
Since these hashes do not match, cmd.exe is the file responsible for the malicious behavior.

ランサムウェア感染の可能性のある兆候（IOC）を検出した後、最初に行うべきステップは隔離です。隔離により、ランサムウェアが他のサーバーやネットワークセグメントに拡散するのを防ぎ、セキュリティチームがインシデントを調査して封じ込めることが可能になります。隔離は、感染したサーバーをネットワークから切断する、悪意のあるトラフィックをブロックする、ファイアウォールルールを適用するなどの方法で行うことができます12。
参考資料: ランサムウェア攻撃後にすべき10のこと、ランサムウェア攻撃からの回復方法：ステップバイステップガイド

The Cyber Kill Chain methodology provides a clear model of how an attacker generally operates during an intrusion and the actions to take at each stage. It is divided into seven stages: reconnaissance, weaponization, delivery, exploitation, installation, command and control, and actions on objectives. It helps network defenders understand and prevent cyberattacks by identifying the attacker's objectives and tactics. References: The Cyber Kill Chain: The Seven Steps of a Cyberattack