Splinter is a post-exploitation tool written in Rust, discovered on customer systems via Advanced WildFire memory scanning. It is notable for its large size due to static linking and uses a JSON configuration for implant and C2 details. The tool operates on a task-based model enabling various post-exploitation activities including command execution on Windows, process injection, file transfers, cloud service reconnaissance, and self-deletion. Its communication with the C2 server is conducted over HTTPS using defined URL paths for different functions. While not as advanced as Cobalt Strike, Splinter represents a growing class of red team tools that may be repurposed by malicious actors.

The tool enables attackers or red team operators to execute commands, inject processes remotely, transfer files, gather cloud service information, and remove traces via self-deletion. This facilitates extensive post-exploitation activities on compromised Windows systems. However, there are no known exploits in the wild at this time.

No official patch or remediation is available as this is a tool rather than a software vulnerability. Detection and prevention should focus on identifying the tool's presence and its network communication patterns, such as HTTPS connections to specific C2 URL paths. Organizations should leverage memory scanning and endpoint detection capabilities to identify and block Splinter. Since no vendor advisory or patch exists, monitoring and incident response remain primary defenses.