ctf-writeup/DefCamp Capture the Flag (D.../who-done-it/README.md

1.0 KiB

who-done-it

We might have an insider threat in our company. Help us to clarify this unconfortable situation.

About the Challenge

We got a zip file called who-was-it.zip and the file contains some useful information about the victim pc such as PowerShell History / Device Information

How to Solve?

There are 3 questions that we need to answer:

  1. Identify the hostname of the compromised machine.

We can get the hostname information at /SystemInfo/output.txt file

Q1

  1. Provide the name of the malware binary downloaded by the attacker on the compromised account.

If we check the PowerShell History command (Especially in plant user). In line 156-157, the attacker tried to download a file called ZekaAPT28.bin

Q2

  1. Which is the suspicious scheduled task created by the attacker on the system?

We can get the suspicious scheduled task at /scheduled_task/Windows/System32/Tasks file

Q3

Q1: DESKTOP-V2VNNIV
Q2: ZekaAPT28.bin
Q3: connect_to_server