CTF-DumpMe

Box Name → DumpMe

Box Link → https://cyberdefenders.org/blueteam-ctf-challenges/65

Author → Champlain College

Description → One of the SOC analysts took a memory dump from a machine infected with a meterpreter malware. As a Digital Forensicators, your job is to analyze the dump, extract the available indicators of compromise (IOCs) and answer the provided questions.

Prerequisites

Download the zip file. Unzip the file with password → “cyberdefenders.org”

NOTE: For this room I’m going to use Volatility 2.6. I have another writeup for Volatility if you want to check that out.

Challenge Questions

Q1. What is the SHA1 hash of Triage-Memory.mem (memory dump)?

A. c95e8cc8c946f95a109ea8e47a6800de10a27abd

shasum Triage-Memory.mem

Q2. What volatility profile is the most appropriate for this machine? (ex: Win10x86_14393)

A. Win7SP1x64

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" imageinfo

Q3. What was the process ID of notepad.exe?

A. 3032

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 pslist | grep notepad.exe

Q4. Name the child process of wscript.exe

A. 3032

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 pstree

Q5. What was the IP address of the machine at the time the RAM dump was created?

A. 10.0.0.101

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 netscan

Q6. Based on the answer regarding the infected PID, can you determine the IP of the attacker?

A. 10.0.0.106

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 netscan

Q7. How many processes are associated with VCRUNTIME140.dll?

A. 5

NOTE: For some reason its not showing all the Process. I did some research but couldn’t find a solution. I will update the write up if i find a solution.

Q8. After dumping the infected process, what is its md5 hash?

A. 690ea20bc3bdfb328e23005d9a80c290

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 procdump -p 3496 --dump-dir "/home/avi/Downloads/vol/”

Q9. What is the LM hash of Bob’s account?

A. aad3b435b51404eeaad3b435b51404ee

/volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 hashdump

Q10. What memory protection constants does the VAD node at 0xfffffa800577ba10 have?

A. PAGE_READONLY

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 vadinfo | grep 0xfffffa800577ba10 -A 6

Q11. What memory protection did the VAD starting at 0x00000000033c0000 and ending at 0x00000000033dffff have?

A. PAGE_NOACCESS

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 vadinfo | grep 0x00000000033c0000 -A 6

Q12. There was a VBS script that ran on the machine. What is the name of the script? (submit without file extension)

A. vhjReUDEuumrX

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 cmdline

Q13. An application was run at 2019-03-07 23:06:58 UTC. What is the name of the program? (Include extension)

A. Skype.exe

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 shimcache | grep "2019-03-07 23:06:58"

Q14. What was written in notepad.exe at the time when the memory dump was captured?

***A. flag***

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 memdump -p 3032 --dump-dir "/home/avi/Downloads/vol/”

strings -e l "/home/avi/Downloads/vol/3032.dmp" | grep 'flag<’

Q15. What is the short name of the file at file record 59045?

A. EMPLOY~1.XLS

./volatility -f "/home/avi/Downloads/vol/Triage-Memory.mem" --profile=Win7SP1x64 mftparser | grep "Record Number: 59045" -A 20

Q16. This box was exploited and is running meterpreter. What was the infected PID?

A. 3496

updated_at 16-07-2022