Full Report
A coordinated campaign of brute-force attacks using hundreds of unique IP addresses targets Apache Tomcat Manager interfaces exposed online. [...]
Analysis Summary
# Tool/Technique: Brute-force Attacks Targeting Apache Tomcat Management Panels
## Overview
This describes ongoing, opportunistic brute-force activity specifically targeting exposed Apache Tomcat management consoles (like the Manager or Host Manager interfaces). The attacks aim to gain unauthorized remote access to running Tomcat instances, often in the absence of specific zero-day exploitation, relying instead on weak or default credentials.
## Technical Details
- Type: Technique
- Platform: Apache Tomcat (Java-based web server/application container)
- Capabilities: Attempting to authenticate to Tomcat management interfaces using common or brute-forced credentials.
- First Seen: Ongoing activity; specific campaigns mentioned are recent/current based on the context provided.
## MITRE ATT&CK Mapping
- T1110 - Credential Access
- T1110.001 - Brute Force: Password Guessing
## Functionality
### Core Capabilities
- **Credential Guessing:** Iteratively attempting various username and password combinations against the login interface for web management consoles on Apache Tomcat installations.
- **Exploitation Readiness:** By establishing persistence or control via brute force, threat actors aim to later exploit vulnerabilities (like RCE) from an authenticated state, or simply gain control over deployed applications.
### Advanced Features
- No specific advanced malware or tooling is detailed in the context *directly* associated with the brute-forcing itself, beyond the *intent* to leverage exposed administrative access. However, the context mentions that this activity frequently precedes exploitation of known RCE flaws in Tomcat, such as CVE-2025-24813.
## Indicators of Compromise
- File Hashes: N/A (Relates to network access attempts)
- File Names: N/A
- Registry Keys: N/A
- Network Indicators: High volume, repetitive failed login attempts to Tomcat manager URLs (e.g., `/manager/html`, `/host-manager/html`) originating from external IP addresses.
- Behavioral Indicators: Rapid sequential requests attempting to use authentication mechanisms (e.g., POST requests to login endpoints).
## Associated Threat Actors
- Broad, opportunistic activity. GreyNoise data suggests this is often unsophisticated web scanning/reconnaissance activity that could precede dedicated threat actor campaigns.
- The context also references threat actors exploiting recently patched RCE vulnerabilities (CVE-2025-24813), suggesting that successful brute-force could lead to compromise by various actors interested in server control.
## Detection Methods
- Signature-based detection: WAF or application firewalls flagging sequential authentication failures from a single source.
- Behavioral detection: Monitoring for login attempts that follow known brute-force patterns targeting default Tomcat user combinations.
- YARA rules: N/A (Focus is network/application behavior, not file artifacts)
## Mitigation Strategies
- Prevention measures: Strong, complex, unique authentication credentials for all Tomcat management interfaces.
- Hardening recommendations:
1. Ensure Tomcat Manager interfaces are **not exposed directly to the public internet.**
2. Implement robust access controls (e.g., IP whitelisting) for management consoles.
3. Regularly audit and apply security patches for Apache Tomcat, especially RCE fixes (e.g., CVE-2025-24813, CVE-2024-56337).
4. Review security logs for suspicious login activity.
## Related Tools/Techniques
- **Patch Exploitation:** Attacks referenced using PoCs for recently disclosed RCE vulnerabilities in Tomcat (CVE-2025-24813, CVE-2024-56337).
- Generic Brute-forcing tools (though not named specifically, tools used for credential stuffing or systematic password guessing fall into this category).