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2025-02-19 • 0x0d4y • 0x0d4y • win.lockbit Open article on Malpedia
Analysis Summary
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Therefore, the summary below is based *only* on the known characteristics and reputation of **LockBit 4.0**, which is the apparent subject matter. **Please provide the actual content of the article for an accurate summary.**
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# Tool/Technique: LockBit 4.0 (LockBit v4)
## Overview
LockBit 4.0 is the latest iteration of the LockBit ransomware-as-a-service (RaaS) operation, known for its high speed, sophisticated encryption methods, and modern evasion capabilities. It is a highly prolific strain of encryptor targeting enterprise networks globally.
## Technical Details
- Type: Malware Family (Ransomware)
- Platform: Windows (primarily, likely Linux/VMware ESXi variants also exist or are expected)
- Capabilities: Fast file encryption, multi-threading, strong anti-analysis features, custom communications protocol, data exfiltration capabilities (double extortion).
- First Seen: Late 2023 (as the successor to LockBit 3.0/LockBit Black)
## MITRE ATT&CK Mapping
*Note: Mappings are generalized for LockBit ransomware families.*
- **TA0001 - Initial Access**
- T1190 - Exploit Public-Facing Application (Often via initial access brokers or exploited vulnerabilities)
- **TA0003 - Persistence**
- T1547.001 - Registry Run Keys / Startup Folder
- **TA0005 - Defense Evasion**
- T1027 - Obfuscated Files or Information
- T1070.004 - File Deletion
- **TA0006 - Credential Access**
- T1003.001 - LSASS Memory
- **TA0011 - Command and Control**
- T1071.001 - Application Layer Protocol (Custom C2)
- **TA0012 - Execution**
- T1059.003 - Windows Command Shell
- **TA0014 - Impact**
- T1486 - Data Encrypted for Impact (Core function)
- T1485 - Data Destruction (Potential for deletion after encryption)
## Functionality
### Core Capabilities
- **Rapid Encryption:** Utilizes multi-threading to significantly speed up the encryption process across volume and network shares.
- **Ransom Note Dropping:** Places ransom notes (`.txt`, `.html`) on affected systems detailing payment instructions.
- **File Modification:** Appends a unique file extension to encrypted files.
- **Service Disabling:** Attempts to terminate known security processes and services (e.g., backup software, antivirus).
### Advanced Features
- **Evasion Techniques:** Expected to feature advanced anti-sandbox/anti-analysis checks (e.g., checking for virtualization artifacts, specific user profiles, or timing delays).
- **Custom C2 Protocol:** Often utilizes non-standard communications for C2 traffic, making network signature detection harder.
- **Locker Mode (Potential):** Previous versions sometimes included "locker mode" (preventing OS functions without encrypting) or specific anti-forensic measures.
- **In-Note Features:** LockBit traditionally includes highly personalized and aggressive negotiation procedures via the ransom note interface.
## Indicators of Compromise
*Note: Specific IoCs for the unpublished article are unknown. These are generalized based on LockBit family operations.*
- File Hashes: [Specific hashes would be determined by the article content]
- File Names: Typically random or obfuscated executable names; ransom notes often named descriptively (e.g., `[COMPUTER NAME]-READ_ME.txt`).
- Registry Keys: [Specific keys would be determined by the article content, often involving persistence paths]
- Network Indicators: C2 communications often point to domains associated with LockBit affiliates (defanged example: `hxxp://c2server.onion`).
- Behavioral Indicators: High disk I/O leading to mass file modification, rapid deletion of Volume Shadow Copies (`vssadmin delete shadows /all /quiet`), disabling of security software services.
## Associated Threat Actors
- LockBit Ransomware Group (The primary operators)
- Various affiliates recruited through their RaaS program.
## Detection Methods
- Signature-based detection: Known file hashes and strings within the binary.
- Behavioral detection: Monitoring for mass file renaming/encryption activity, attempts to delete VSS, and termination of security-related processes.
- YARA rules: Rules targeting specific decryption routines or unique binary sections.
## Mitigation Strategies
- **Patch Management:** Rigorous and timely patching of all public-facing services (RDP, VPNs, web servers).
- **Network Segmentation:** Isolating critical assets to limit lateral movement post-compromise.
- **MFA Enforcement:** Implementing Multi-Factor Authentication, especially for remote access and administrative services.
- **Backup Strategy:** Maintaining immutable, offline, and tested backups (3-2-1 rule).
- **Endpoint Detection and Response (EDR):** Deploying solutions capable of detecting ransomware execution choreography.
## Related Tools/Techniques
- Previous Versions: LockBit 1.0, LockBit 2.0 (LockBit Black)
- Similar RaaS Operations: BlackCat (ALPHV), Cl0p, Conti.