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Confluence RCE [CVE-2022-26134] Exploit Detection

Pre-requisites

  1. ClamAV

Clone this repository or download the Yara rule on your confluence server

We are using the Yara rule provided by volexity/threat-intel who first unveiled this vulnerability.

Git Clone

git clone https://github.com/th3b3ginn3r/CVE-2022-26134-Exploit-Detection.git

Raw file download

CVE-2022-26134.yar: https://raw.githubusercontent.com/th3b3ginn3r/CVE-2022-26134-Exploit-Detection-on-Linux/main/CVE-2022-26134.yar

curl -o <CVE-2022-26134.yar url>

Alternatively, you can also download the Yara rule directly from the volexity repository

Usage

sudo clamscan -d /path-to-the/CVE-2022-26134.yar -r /path-to-scan -io #If scannig "/" root directory, include " exclude-dir="^/sys" " in the command.

Reading the results

Now when you have run the scan, you will be presented with the scan summary. Below is a sample of it.

----------- SCAN SUMMARY -----------
Known viruses: 3 #These are the number of Yara rules in the CVE-2022-26134.yar file
Engine version: 0.xxx.5
Scanned directories: 20000
Scanned files: 200000
Infected files: 0 #See the count of infected files or the list of files that matches the conditions of the Yara rules
Data scanned: 1000.08 MB
Data read: 18000.00 MB (ratio 0.54:1)
Time: 284.885 sec (4 m 44 s)
Start Date: 2022:06:03 00:19:34
End Date:   2022:06:03 00:24:19

Manual Hunting

You may additionaly want to search for suspicious activities in below confluence logs:

  1. conf access log (log file name may differ in your environment)
  2. catalina*.log

Detailed write-up on Manual Hunting : https://link.medium.com/cebuWoAazqb

License

[GPL] GPL-3.0 license