Malware Analysis

Forensics CheatSheets

https://www.jaiminton.com/cheatsheet/DFIR/#

Online Services

• VirusTotal

• HybridAnalysis

• Koodous

• Intezer

Offline antivirus

Yara

Install

sudo apt-get install -y yara

Prepare rules

Use this script to download and merge all the yara malware rules from github: https://gist.github.com/andreafortuna/29c6ea48adf3d45a979a78763cdc7ce9 Create the rules directory and execute it. This will create a file called malware_rules.yar which contains all the yara rules for malware.

wget https://gist.githubusercontent.com/andreafortuna/29c6ea48adf3d45a979a78763cdc7ce9/raw/4ec711d37f1b428b63bed1f786b26a0654aa2f31/malware_yara_rules.py
mkdir rules
python malware_yara_rules.py

Scan

yara -w malware_rules.yar image  #Scan 1 file
yara -w malware_rules.yar folder #Scan hole fodler

ClamAV

Install

sudo apt-get install -y clamav

Scan

sudo freshclam      #Update rules
clamscan filepath   #Scan 1 file
clamscan folderpath #Scan the hole folder

rkhunter

Tools like rkhunter can be used to check the filesystem for possible rootkits and malware.

sudo ./rkhunter --check -r / -l /tmp/rkhunter.log [--report-warnings-only] [--skip-keypress]

PEpper

PEpper checks some basic stuff inside the executable (binary data, entropy, URLs and IPs, some yara rules).