Erebus

MITRE ATT&CK does not currently catalogue Erebus, so this is our assessment of the techniques it uses, drawn from public reporting. The techniques themselves, and every "what that means" definition below, come from MITRE ATT&CK v19.2. Confidence: low. Treat it as orientation, not attribution.

1. T1059.001 PowerShell Execution

   What they do: erebus executes commands via PowerShell scripts embedded in its malware deployment chain.

   What that means: Adversaries may abuse PowerShell commands and scripts for execution.

2. T1547.001 Registry Run Keys / Startup Folder PersistencePrivilege Escalation

   What they do: erebus establishes persistence by modifying registry run keys to reload after reboot.

   What that means: Adversaries may achieve persistence by adding a program to a startup folder or referencing it with a Registry run key.

3. T1548.002 Bypass User Account Control Privilege Escalation

   What they do: erebus bypasses User Account Control checks to operate with elevated privileges.

   What that means: Adversaries may bypass UAC mechanisms to elevate process privileges on system.

4. T1685 Disable or Modify Tools Defense Impairment

   What they do: erebus disables security tools and monitoring utilities to hinder incident response.

   What that means: Adversaries may disable, degrade, or tamper with security tools or applications (e.g., endpoint detection and response (EDR) tools, intrusion detection systems (IDS), antivirus, logging agents, sensors, etc.) to impair or reduce visibility of defensive capabilities.

5. T1070.004 File Deletion Stealth

   What they do: erebus deletes Volume Shadow Copies and backup artifacts to prevent data restoration.

   What that means: Adversaries may delete files left behind by the actions of their intrusion activity.

6. T1083 File and Directory Discovery Discovery

   What they do: erebus scans file and directory structures to identify valuable files for encryption.

   What that means: Adversaries may enumerate files and directories or may search in specific locations of a host or network share for certain information within a file system.

7. T1486 Data Encrypted for Impact Impact

   What they do: erebus encrypts victim files using its own ransomware payload to hold data hostage.

   What that means: Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to system and network resources.

8. T1490 Inhibit System Recovery Impact

   What they do: erebus disrupts system recovery by disabling backup restoration processes and services.

   What that means: Adversaries may delete or remove built-in data and turn off services designed to aid in the recovery of a corrupted system to prevent recovery.