Siegedsec

MITRE ATT&CK does not currently catalogue Siegedsec, 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: medium. Treat it as orientation, not attribution.

1. T1059.001 PowerShell Execution

   What they do: Siegedsec executes PowerShell scripts to run payload deployment, credential access, and lateral movement commands.

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

2. T1685 Disable or Modify Tools Defense Impairment

   What they do: Siegedsec disables antivirus and security tools using native API calls to evade detection and persistence mechanisms.

   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.

3. T1070.004 File Deletion Stealth

   What they do: Siegedsec performs file deletion to remove backups, Volume Shadow Copies, and recovery artifacts before encryption.

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

4. T1110 Brute Force Credential Access

   What they do: Siegedsec brute-forces local accounts to obtain credentials for initial access and privilege escalation across systems.

   What that means: Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.

5. T1135 Network Share Discovery Discovery

   What they do: Siegedsec uses network share discovery to locate victim file shares and identify high-value data for exfiltration or encryption.

   What that means: Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement.

6. T1021.002 SMB/Windows Admin Shares Lateral Movement

   What they do: Siegedsec leverages SMB/Windows Admin Shares to move laterally across networked systems within targeted environments.

   What that means: Adversaries may use Valid Accounts to interact with a remote network share using Server Message Block (SMB).

7. T1486 Data Encrypted for Impact Impact

   What they do: Siegedsec encrypts victim files using its ransomware payload to maximize impact and trigger extortion demands.

   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: Siegedsec invokes system recovery inhibition commands to prevent backup restoration and increase ransomware impact.

   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.