## Incident Summary
Following the spear phishing attack, Sidewinder APT successfully executed malware on compromised systems using a combination of document exploits and vulnerability exploitation.

## Technical Details
- **Exploited Vulnerabilities:** The group leveraged known vulnerabilities in outdated software, particularly focusing on CVEs related to document processing applications.
- **Payload Features:** The malware payload was designed to establish backdoor access, enabling remote command execution and data exfiltration.

## Observations
The malware demonstrated advanced persistence techniques, including registry modification and scheduled tasks, to maintain presence on the infected systems.

## Countermeasures
- **Patch Management:** Ensure systems are regularly updated and patched against known vulnerabilities.
- **Endpoint Protection:** Deploy advanced endpoint protection solutions capable of detecting exploit behaviors.

The successful execution of the malware sets the stage for establishing C2 communication, which will be detailed in the next phase of this operation.