Adversaries may attempt to remove indicators of their presence on a system in an effort to cover their tracks. In cases where an adversary may feel detection is imminent, they may try to overwrite, delete, or cover up changes they have made to the device.
| ID | Name | Description |
|---|---|---|
| S0607 | KillDisk |
KillDisk deletes application, security, setup, and system event logs from Windows systems. [1] |
| S1009 | Triton |
Triton would reset the controller to the previous state over TriStation and if this failed it would write a dummy program to memory in what was likely an attempt at anti-forensics. [2] |
| C0030 | Triton Safety Instrumented System Attack |
In the Triton Safety Instrumented System Attack, TEMP.Veles would programmatically return the controller to a normal running state if the Triton malware failed. If the controller could not recover in a defined time window, TEMP.Veles programmatically overwrote their malicious program with invalid data.[3] |
| ID | Mitigation | Description |
|---|---|---|
| M0922 | Restrict File and Directory Permissions |
Protect files stored locally with proper permissions to limit opportunities for adversaries to remove indicators of their activity on the system. [4] [5] |
| ID | Name | Analytic ID | Analytic Description |
|---|---|---|---|
| DET0750 | Detection of Indicator Removal on Host | AN1882 |
Monitor executed commands and arguments that may delete or alter generated artifacts on a host system, including logs or captured files such as quarantined malware. |