Full Report
Sha1-Hulud is back with a new evolution of its supply-chain attack that targets development environments via Node Package Manager (npm). npm is a very popular package manager for Node.js that provides millions of predeveloped packages of code to be used by JavaScript developers for access to millions of packages.
Analysis Summary
# Tool/Technique: Sha1-Hulud (npm Supply-Chain Attack)
## Overview
Sha1-Hulud is the name associated with a new evolution of a supply-chain attack that specifically targets development environments by exploiting the Node Package Manager (npm). This attack leverages compromised or malicious packages within the npm ecosystem to distribute secondary malware or execution commands to developers integrating these packages into their projects.
## Technical Details
- Type: Technique / Malware Delivery Mechanism (Supply Chain Attack)
- Platform: Development Environments utilizing Node.js and npm
- Capabilities: Infection via the npm ecosystem, remote code execution within the developer's environment through package dependencies or malicious package injection.
- First Seen: Information not specified in the provided text, but described as a "new evolution."
## MITRE ATT&CK Mapping
Since the full chain of execution isn't detailed, the primary focus appears to be on software supply chain compromise and initial execution via development interaction.
- **TA0006 - Credential Access** (Implied consequence of credential compromise)
- **T1003 - OS Credential Dumping** (If subsequent stages dump credentials)
- **TA0002 - Execution**
- **T1204 - User Execution** (If the developer runs a setup script or package install)
- **TA0001 - Initial Access**
- **T1195 - Supply Chain Compromise**
- **T1195.002 - Compromise Software Supply Chain: Compromise Software Dependencies**
## Functionality
### Core Capabilities
- **Supply Chain Infection:** Leveraging the npm registry to distribute malicious code hidden within legitimate-looking packages.
- **Remote Code Execution via Public Forums:** The technique mentions adversaries posting command-and-control (C2) style instructions in public npm discussion forums which, when executed locally by the victim, trigger payload delivery (e.g., `powershell -noexit "& ""C:\My Scripts\MyEvilScript.ps1"""`).
### Advanced Features
- **Targeted Environments:** Specifically targets developers using Node Package Manager (npm), implying an interest in source code, build systems, and potentially sensitive artifacts stored on development machines.
- **Use of Common Files:** Associated samples include files like `bun_environment.js` and `setup_bun.js`, suggesting an obfuscated or novel method of execution, potentially tied to specific runtime tools like bun.
## Indicators of Compromise
- File Hashes:
- SHA256: `62ee164b9b306250c1172583f138c9614139264f889fa99614903c12755468d0`
- SHA256: `f099c5d9ec417d4445a0328ac0ada9cde79fc37410914103ae9c609cbc0ee068`
- SHA256: `cbb9bc5a8496243e02f3cc080efbe3e4a1430ba0671f2e43a202bf45b05479cd`
- SHA256: `a3894003ad1d293ba96d77881ccd2071446dc3f65f434669b49b3da92421901a`
- File Names:
- `bun_environment.js`
- `setup_bun.js`
- Registry Keys: [Not specified in the provided text]
- Network Indicators: [No specific network indicators provided in the excerpt]
- Behavioral Indicators:
- Execution of PowerShell commands via npm package processes.
- Posting malicious execution commands in public npm discussion forums.
## Associated Threat Actors
- Sha1-Hulud (This name is used to label the campaign/evolution)
## Detection Methods
- Signature-based detection: Check for the presence of the provided SHA256 hashes.
- Behavioral detection: Monitor for unusual PowerShell execution originating from package manager processes or JavaScript/Node environments interacting with the file system or network directories.
## Mitigation Strategies
- Perform ongoing threat hunting for associated IoCs, especially across development and CI/CD systems.
- **Temporarily freeze any npm package updates** until the scope of the campaign is fully understood.
- **Assume credential compromise:** Reset all credentials present on any system where the malware was executed or installed.
- Revisit supply chain security policy, including inventorying and auditing 3rd party dependencies.
## Related Tools/Techniques
- Supply Chain Compromise techniques leveraging popular package managers (e.g., malicious packages on npm, PyPI), which is a known trend in modern software development attacks.