Full Report
ASEC Blog publishes Ransom & Dark Web Issues Week 4, Februar 2025 Ransomware gang Black Basta’s internal chat leak: Activity decreased due to internal division US subsidiary of Korean boiler company: Data leak due to Akira ransomware attack New ransomware group Anubis emerges: Operates with a multi-layered revenue model […]
Analysis Summary
This article is a general security bulletin covering multiple, distinct incidents and threat intelligence updates observed during the fourth week of February 2025, rather than a single, detailed incident report. Therefore, the timeline will reflect the reporting/publication date and the context of the threats observed, drawing on the specific events mentioned.
# Incident Report: February 2025 Ransomware & Dark Web Threat Summary
## Executive Summary
This summary reports on several distinct security events occurring around the fourth week of February 2025, including a data leak from the Black Basta ransomware group, a confirmed Akira ransomware attack on a US subsidiary of a Korean boiler company, and the emergence of a new ransomware group named Anubis. These incidents highlight ongoing risks concerning ransomware attacks and data extortion.
## Incident Details
- Discovery Date: February 27, 2025 (Date of ASEC Publication)
- Incident Date: Occurrences span the period leading up to late February 2025.
- Affected Organization: US subsidiary of a Korean boiler company (Specific company name undisclosed).
- Sector: Manufacturing/Industrial (Boiler Industry) and General Cybercrime Threat Landscape.
- Geography: United States (for the Akira incident).
## Timeline of Events
### Initial Access
- Date/Time: Varied (Prior to detection/publication).
- Vector: Implied use of ransomware deployment methods (Akira utilizes various vectors, though not specified for this case).
- Details: Akira ransomware was successfully used against the US subsidiary of a Korean boiler company, resulting in a data leak.
### Lateral Movement
- Details: Not specified, but typical of ransomware operations aiming to deploy encryption payloads.
### Data Exfiltration/Impact
- Details: Data leak confirmed following the Akira attack on the boiler company's subsidiary. The Black Basta leak revealed internal division issues, suggesting operational stress within the threat actor group. The new Anubis group is noted for employing a multi-layered revenue model, suggesting data collection/exfiltration is central to their operations.
### Detection & Response
- Date/Time: February 27, 2025 (Publication Date).
- Details: ASEC published the summary of these disparate threats. Response actions for the specific boiler company incident are not detailed in this overview.
## Attack Methodology
*Note: Methodologies reflect the threats discussed in the bulletin, not a single unified attack.*
- Initial Access: Not specified for the boiler company incident.
- Persistence: Not specified.
- Privilege Escalation: Not specified.
- Defense Evasion: Implied capability of ransomware groups like Akira and Anubis.
- Credential Access: Not specified.
- Discovery: Not specified.
- Lateral Movement: Not specified.
- Collection: Implied, especially by the new Anubis group utilizing a multi-layered revenue model (suggesting data theft/extortion).
- Exfiltration: Confirmed data leak attributed to Akira.
- Impact: Data encryption (Ransomware) and Data Extortion (Data Leak/Black Basta).
## Impact Assessment
- Financial: Not calculated in the overview, but direct costs associated with ransomware negotiation, recovery, and remediation are implied for the affected boiler company subsidiary.
- Data Breach: Confirmed data leak related to the Akira incident on the US subsidiary. Specific type/volume unknown.
- Operational: Disruption from the Akira ransomware deployment against the boiler company subsidiary.
- Reputational: Potential reputational damage as a member of the Akira ransomware victims group.
## Indicators of Compromise
*IOCs are generally not included in this overview summary; reference to the AhnLab TIP platform is made for subscribers.*
- Network indicators: None provided in the summary.
- File indicators: None provided in the summary.
- Behavioral indicators: Observation of ransomware group activity (Black Basta, Akira, Anubis).
## Response Actions
- Containment/Eradication/Recovery: Not specified for the individual incidents mentioned; the report serves as threat intelligence dissemination.
## Lessons Learned
- Ransomware remains a significant and active threat, with established groups (Akira) and emerging actors (Anubis) continuing development of monetization strategies.
- Internal conflicts or governance issues within major ransomware groups (like Black Basta) can briefly impact their operational tempo.
## Recommendations
- Organizations must maintain robust defenses against established ransomware families like Akira.
- Security teams should monitor threat intelligence feeds closely for indicators related to continuously evolving threat groups like Anubis.
- Backup and recovery strategies must be tested rigorously to mitigate the impact of encryption attacks.