Full Report
Not very successfully ;)
Analysis Summary
# Tool/Technique: Remcos RAT
## Overview
Remcos RAT is a commercial Remote Administration Tool (RAT) sold online, which is frequently abused by threat actors to gain remote control over victim machines, collect sensitive information, and perform further malicious activities.
## Technical Details
- Type: Malware family (Remote Administration Tool)
- Platform: Windows (Inferred from typical RAT operations and context)
- Capabilities: Remote control, information theft
- First Seen: Not explicitly stated in the context, but it is an established commercial RAT.
## MITRE ATT&CK Mapping
*Since the article focuses on infection and C2 communication rather than specific internal exploitation techniques, the most relevant mappings relate to initial access and command and control.*
- **TA0001 - Initial Access**
- T1566 - Phishing
- T1566.001 - Spearphishing Attachment (Implied by phishing email leading to download)
- **TA0011 - Command and Control**
- T1071 - Application Layer Protocol
- T1071.001 - Web Protocols (Implied communication channel)
## Functionality
### Core Capabilities
- Remote administration and control over infected systems.
- Exfiltration of sensitive information from victims.
### Advanced Features
- Deployment via phishing campaigns leading to download from file-sharing sites (e.g., filetransfer.io).
- Communication established with Command and Control (C2) infrastructure.
## Indicators of Compromise
- **File Hashes:** SHA256: `c69b2064c89c254dbeda8f204b3a60ab753816ddff618be9d593cb9839cfe09d` (The sample investigated)
- **File Names:** (Not provided)
- **Registry Keys:** (Not provided)
- **Network Indicators:**
- **High Confidence C2/Communication IPs:**
- 178.237.33[.]50
- 185.29.10[.]213 (Initial reported IP on port 63650)
- 188.114.96[.]0 (Range)
- 188.114.96[.]3
- 188.114.97[.]0 (Range)
- 188.114.97[.]3
- **Moderate Confidence IPs (Associated Infrastructure):**
- 185.29.9[.]113
- 185.29.8[.]124
- 109.248.144[.]171
- 185.29.9[.]118
- 185.29.9[.]119
- 95.142.100[.]71
- 165.227.209[.]82
- 178.237.33[.]34
- 178.237.33[.]51
- 178.237.35[.]186
- 178.250.238[.]75
- 178.250.238[.]76
- 208.109.38[.]215
- **Behavioral Indicators:** Connection attempts to specific IPs/ports, often involving ports associated with RDP (3389) alongside proprietary/uncommon ports (e.g., 47001, 63650) in the broader threat landscape, although the specific Remcos communication port isn't definitively listed beyond the initial report.
## Associated Threat Actors
- Threat actors utilizing commercial/illegitimate remote administration tools (General adversaries seeking remote access and data theft).
- Infrastructure pivoting suggests use by actors involved in generic spam, phishing, and APT campaigns.
## Detection Methods
- **Signature-based detection:** Use the provided file hash (`c69b2064c89c254dbeda8f204b3a60ab753816ddff618be9d593cb9839cfe09d`) via antivirus or EDR systems.
- **Behavioral detection:** Monitor for connections to the identified C2 IP ranges, particularly those utilizing high or unusual ports for application communication. Monitor for processes initiated from unexpected paths after initial access via phishing/download.
- **YARA rules:** Not provided in the context.
## Mitigation Strategies
- **Prevention measures:** Implement email security gateways capable of scanning links, attachments, and sandboxing downloaded files originating from shared file services.
- **Hardening recommendations:** Strictly enforce application whitelisting to prevent execution of unauthorized binaries downloaded through phishing kits. Restrict outbound connections on non-standard ports unless absolutely necessary for business operations (e.g., block or monitor egress traffic pointing to identified C2 IPs).
## Related Tools/Techniques
- Other commercial or publicly available RATs often misused by threat actors (e.g., DarkComet, NanoCore).
- Techniques involving exploiting user trust via social engineering (Phishing).