Ransomware - data decryption from cryptolocker.

Dynamic analysis and static analysis are the two ways to approach the process of analyzing a piece of software. With static analysis, the sample is examined without detonating it, whereas with dynamic analysis, the sample is actually executed.

Detection models are formed by analyzing samples in the wild. This is the most efficient way to process and assess a sample on the network infrastructure.
Cuckoo Sandbox is an open-source platform that can be modified to run custom scripts and generate comprehensive reports. There are several alternative tools in the market.

The static properties analysis involves looking at a file. This process is usually done in a virtual machine that is disconnected from the internet.
PeStudio is one of the free tools that can be used for this purpose. This tool can be used to flag suspicious artifacts within files. The file hashes presented by PeStudio can be used to find out if the file has been analyzed before. It can be used to examine the embedded strings, libraries, imports, and other indicators of compromise and compare any unusual values that differ from those typically seen in regular executable files.
If you conduct static property analysis, you should give the analyst a good idea of whether to continue or stop the investigation.

In the next phase of behavior analysis, the analyst observes how the sample interacts with the system and the changes it makes. Sometimes a piece of software will refuse to execute if it finds a virtual environment or is designed to avoid manual interaction. E. In an automated environment.
There are a number of actions that should raise a red flag.
Adding or modifying files. New services or processes are being installed. Changing system settings or modifying the registry.
Some types of malicious software might try to connect to host IPs that are not in the environments. To preserve operational stability, others might try to create mutex objects. These findings can be used as indicators of compromise.
There are some tools that you can use.
Network packets can be observed with wireshark. Process Hacker can observe the processes that are executing. Process Monitor can be used to observe real-time file system, registry, and process activity. A graphical representation of all recorded activities is provided by ProcDot. There is a You can conduct additional research on the new data points you gather by using a database. Information about the command and control infrastructure of the specimen can be revealed by additional network analysis.

Valuable insights can be provided by reverse engineering the code. This process can be used.
There is some light on the logic of the software. There are hidden capabilities and exploitation techniques that the malware uses. Insights about the communication protocol between the client and the server can be provided.
Analysts use debuggers and disassemblers to reverse the code. ?Code reversals are an extremely time-Consuming process, and although the skills to perform them arent particularly common, this step can provide plenty of important insights.