Once attackers gain initial access, the next step is to run something inside the environment — a script, a command, a program, or a malicious payload.
This step is called execution.
Execution is when an attacker runs code inside a system to begin carrying out their objectives.
Think of it like a burglar who:
- flips the light switch
- disables the alarm panel
- opens a toolbox
- or starts drilling into a safe
Getting inside is one thing.
Doing something once inside is another.
Digitally, attackers execute code by:
- running malicious scripts
- launching ransomware
- using built‑in tools like PowerShell
- executing remote commands
- running malware disguised as legitimate software
Why this matters for insurance:
Execution is often the moment an intrusion becomes an incident.
It’s where ransomware starts encrypting files, where data‑stealing tools begin collecting information, and where attackers start taking visible actions.
This is also where tools like EDR and SIEM should detect unusual behavior — if they’re deployed and tuned correctly.
When a company says, “We detected suspicious activity,” the real question is:
“What executed — and did your SOC investigate it quickly enough?”
The takeaway:
Execution is the attacker’s first real action inside the system.
Stopping it early can prevent lateral movement, privilege escalation, and data exfiltration.
Pop Culture Parallel:
In Mission: Impossible, getting into the vault is only step one — the real action begins when the team starts running their tools inside. Execution works the same way.
Real‑World Example:
In the 2021 Kaseya ransomware attack, once attackers gained access, they executed malicious scripts across managed systems, triggering widespread encryption within minutes.
Vocabulary Reinforcement (from earlier posts)
- Initial Access — introduced in #18
• EDR — introduced in #4
• SIEM — introduced in #2
• SOC — introduced in #3
• Lateral Movement — introduced in #12
• Privilege Escalation — introduced in #13
• Data Exfiltration — introduced in #16
Previous Episode:
12. Initial Access ←
Next Episode:
14. Persistence →
Related Episodes:
12. Initial Access
14. Persistence
15. Privilege Escalation
16. Lateral Movement
7. EDR
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