Blog – eyehatemalwares

Phishing IR Approach

Posted on November 10, 2022March 1, 2023 by randrada

Phishing Incident Detection and Response:
Identifying Email and Document Existence using Memory Forensics

Lab Goal

- Identify Email Subject
- Identify Document Name
- Identify Timestamps
- Identify Sender Name
- Identify Launched Programs
- List Available Detection Method

Tools Used

Because employees are the most vulnerable targets for an organization, giving attackers the ability to compromise their targets by preying on human weakness like emotions. For this reason, adversaries plan their assaults intelligently by using phishing attacks.

In this demo, we will tackle about different approach on how to detect and respond to a phishing incident using a memory forensics tool.

Scenario: What if due to fear of getting sanctioned by the organization, an employee trashed a possible phishing email after he/she clicked and downloaded the potential suspicious attachment.

Now, as the analyst we are tasked to perform Incident Response and Digital Forensics on the machine and find some useful evidence of email existence.

LinuxBrowserHistory

Posted on November 7, 2022November 7, 2022 by randrada

How to Extract Browser History in Linux Systems

Linux tools used in this demo.

- cat
- netcat
- ls

Lab Requirements

- Linux System
- Windows System
- bstrings.exe
- notepad++

In this demo, we will be extracting firefox browser history.

Scenario: You are tasked to perform live forensics on a Linux-based system to gather its browser history.

Dumping Firefox History

Firefox browser history can be found at: ~/.Mozilla/firefox/<dir>/places.sqlite

In this step, we run “cat” command and pipe to “>” operator to save it to disk.

Command: cat ~/.mozilla/firefox/*/places.sqlite > browser_history.txt

In this case, we use “*” so it will search to all available directory for “places.sqlite” rather than manually searching each directory.

Sending Browser File to Analysis Box

Since we will be using a Windows box to analyze our file, we will be using “netcat” for both Linux and Windows system to perform the transfer.

To do this, we can run netcat command from out Linux Box.

Command: netcat -w 2 <listener_windowsIP> <port> < browser_hist.txt

This put out Linux box to an idle mode waiting for the netcat listener.

Next, we setup our netcat listener from our Windows machine.

Command: ncat -l 4444 > browser_history.txt

After successful execution, we can now confirm our file when we open it to our text editor tool “notepad”.

Filtering URL

In this step, we will be using bstrings.exe from EZ tools to do the work for us.

To do this, open cmd prompt and Run As Admin and run the following commands:

- bstrings.exe -f browser_history.txt -p
- bstrings.exe -f browser_history –lr url3986 > browser_history_after.txt

Learn and Download bstrings here: https://eyehatemalwares.com/incident-response/eztools/bstrings/

Why bstrings? Examining raw data from our dumped file “places.sqlite” takes a lot of work if we do it manually.

File Comparison

In this step, we can finally compare both raw browser_history.txt and browser_history_after.txt

In this case, we can see that the strings that doesn’t match the regex URL pattern from bstrings.exe are removed and only presented us only the URL format.

Summary

Browser history can reveal artifacts that can help the analyst during investigation, it can reveal information such as C2C server and also, this approach doesn’t limit to Firefox browser only, as an Analyst we can leverage this approach to investigate other browser’s history.

Persistence AppINIT

Posted on November 7, 2022March 1, 2023 by randrada

Malware Persistence: DLL injection via AppInit_DLLs Registry

Tools Used

- powershell
- regedit.exe
- kdiff
- diff

Lab Requirements

- Windows System (x86 or x64)
- Tools
- malware.dll (renamed legitimate .dll file)

One of the goal of the malware is to be able to achieve persistence inside the compromise system and one of the technique being implemented by these authors is to manipulate registry value.

In this demo, we will discuss how malware can persist on the system using AppInit_Dlls registry key.

Scenario: Your security solution detected that one of your organization’s endpoint is reaching a non-whitelisted domain/IP. By performing initial investigation, the user failed to report that she clicked and downloaded a email attachment few days ago.