Full Report
On 2024-07-25, an incident was reported, involving IntelBroker, gaining initial access via 1-day vulnerability, while using Network lateral movement, SSH key compromise, Local privilege escalation via vulnerability exploitation, targeting Jenkins, GitHub to achieve Supply chain attack.
Analysis Summary
# Incident Report: IntelBroker Supply Chain Attack Targeting BORN Group
## Executive Summary
On July 25, 2024, threat actor IntelBroker executed a sophisticated supply chain attack against BORN Group, leveraging a 1-day vulnerability for initial access. The attacker utilized SSH key compromise and local privilege escalation to move laterally within the environment, ultimately targeting development platforms like Jenkins and GitHub to compromise the software supply chain. Response actions and lessons learned focus on hardening build environments and patching vulnerabilities immediately.
## Incident Details
- **Discovery Date:** July 25, 2024 (Based on the published date of the observed activity)
- **Incident Date:** Circa July 25, 2024
- **Affected Organization:** BORN Group (Implied based on the source context: "BORN Group supply chain attack")
- **Sector:** Technology/Software Development (Implied by targeting Jenkins/GitHub)
- **Geography:** Not disclosed
## Timeline of Events
### Initial Access
- **Date/Time:** On or before 2024-07-25
- **Vector:** 1-day vulnerability exploitation
- **Details:** The attacker gained initial foothold by exploiting a known vulnerability for which a patch was available (a "1-day" vulnerability).
### Lateral Movement
- **Details:** Attackers employed **Network lateral movement** techniques. Access was further entrenched through the **compromise of SSH keys**.
### Data Exfiltration/Impact
- **Impact:** The primary goal was a **Supply chain attack**, targeting critical development tools (**Jenkins** and **GitHub**) to potentially inject malicious code into software or access source code repositories.
### Detection & Response
- **How it was discovered:** The incident became public knowledge through reporting on July 25, 2024.
- **Response actions taken:** Unspecified, but containment would focus on isolating compromised hosts and rotating secrets associated with Jenkins/GitHub.
## Attack Methodology
- **Initial Access:** Exploitation of a 1-day vulnerability.
- **Persistence:** Not explicitly detailed, but likely established through compromised SSH keys or persistence mechanisms on compromised build servers.
- **Privilege Escalation:** Achieved via **vulnerability exploitation** leading to local privilege escalation.
- **Defense Evasion:** Not explicitly detailed.
- **Credential Access:** Implied through **SSH key compromise**.
- **Discovery:** Likely reconnaissance following initial access to identify build infrastructure.
- **Lateral Movement:** **Network lateral movement** leveraging compromised credentials/keys.
- **Collection:** Targeting data related to source code, build configurations, and deployment pipelines (Jenkins/GitHub).
- **Exfiltration:** Not detailed, but implied goal of supply chain compromise.
- **Impact:** Compromise of the software supply chain via integration with Jenkins and GitHub environments.
## Impact Assessment
- **Financial:** Not available.
- **Data Breach:** Compromise of intellectual property, source code, and potentially sensitive customer data integrated into the CI/CD pipeline.
- **Operational:** Significant risk of disruption to software development and deployment integrity.
- **Reputational:** High potential impact due to the nature of a supply chain attack.
## Indicators of Compromise
*(Note: Specific IoCs were not provided in the context, thus listing generic behavioral indicators based on the TTPs described.)*
- **Network indicators:** Suspicious outbound connections from build servers (e.g., Jenkins hosts).
- **File indicators:** Presence of unauthorized SSH public/private key files in user or system accounts.
- **Behavioral indicators:** Unexpected execution of commands on Jenkins agents or automated GitHub actions runners; high privilege actions originating from non-standard accounts.
## Response Actions
- **Containment measures:** Immediately isolate affected build servers (Jenkins, GitHub instances). Revoke and rotate all compromised SSH keys and associated credentials.
- **Eradication steps:** Audit all configuration files on build systems for unauthorized changes. Determine the scope of penetration resulting from the privilege escalation.
- **Recovery actions:** Rebuild critical infrastructure from trusted baselines. Mandate immediate patching for the exploited 1-day vulnerability across the entire organization.
## Lessons Learned
- The critical danger posed by unpatched "1-day" vulnerabilities, even for a short period.
- The significant risk posed by direct integration and access between network movement and CI/CD systems (Jenkins/GitHub).
- Insufficient defense leading to both local privilege escalation and subsequent network move.
## Recommendations
- Establish an aggressive patching SLA, prioritizing vulnerabilities that could lead to public-facing compromise or initial access, regardless of severity score.
- Implement strong network segmentation between development/build environments and the general corporate network.
- Enhance monitoring on build servers (Jenkins/GitHub runners) for anomalous SSH key usage and privilege escalation attempts.
- Review and significantly restrict the permissions associated with SSH keys used for automation, adhering to the principle of least privilege.