Bonacigroup

MITRE ATT&CK does not currently catalogue Bonacigroup, 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: bonacigroup executes malicious payloads via PowerShell scripts injected into legitimate processes.

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

2. T1685 Disable or Modify Tools Defense Impairment

   What they do: bonacigroup disables antivirus tools by terminating security processes and modifying service configurations.

   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. T1027.016 Junk Code Insertion Stealth

   What they do: bonacigroup inserts junk code into legitimate binaries to evade static malware analysis.

   What that means: Adversaries may use junk code / dead code to obfuscate a malware’s functionality.

4. T1070.004 File Deletion Stealth

   What they do: bonacigroup deletes Volume Shadow Copies via vssadmin /delete shadows to prevent recovery.

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

5. T1003.001 LSASS Memory Credential Access

   What they do: bonacigroup dumps LSASS memory using a custom Mimikatz-derived tool to steal credentials.

   What that means: Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).

6. T1110 Brute Force Credential Access

   What they do: bonacigroup brute-forces local administrator credentials using Hydra to gain initial access.

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

7. T1135 Network Share Discovery Discovery

   What they do: bonacigroup scans network shares using net use commands to identify victim file servers and data stores.

   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.

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

   What they do: bonacigroup moves laterally across SMB shares to encrypt files across networked drives.

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

9. T1486 Data Encrypted for Impact Impact

   What they do: bonacigroup encrypts victim documents and databases using a custom symmetric encryption routine.

   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.

10. T1490 Inhibit System Recovery Impact

    What they do: bonacigroup halts system recovery by stopping critical Windows services and rebooting hosts.

    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.