Full Report
2025-06-23 • DeXpose • M4lcode • win.phemedrone_stealer Open article on Malpedia
Analysis Summary
# Tool/Technique: AnyDesk Clone Loader delivering Phemedrone Stealer
## Overview
This entry describes a multi-stage attack where a decoy application, masquerading as AnyDesk, is used to drop a .NET loader. This loader decrypts and executes a final payload, identified as the Phemedrone Stealer, leveraging AES encryption for concealment.
## Technical Details
- Type: Malware (Loader and Stealer)
- Platform: Windows
- Capabilities: Initial infection via social engineering (AnyDesk clone), dynamic payload loading, AES encryption for payload delivery, Anti-Virus (AV) evasion.
- First Seen: Based on the context date, the analysis appears to be recent (2025-06-23).
## MITRE ATT&CK Mapping
*Note: Specific TTPs must be inferred from the description of evasion, loading, and delivery mechanisms used by the loader.*
- [TA0001 - Initial Access]
- [T1566 - Phishing] (Via deceptive application/social engineering)
- [TA0005 - Defense Evasion]
- [T1027 - Obfuscated Files or Information] (Via AES Encrypted Payload)
- [TA0004 - Privilege Escalation] (If the stealer attempts local privilege expansion, common for credential/info stealers)
- [TA0009 - Collection]
- [T1518 - Software Discovery] (Common for stealers looking for installed applications/browsers)
## Functionality
### Core Capabilities
- **Dropper/Loader:** Utilizes a cloned AnyDesk application as a lure to gain initial execution.
- **Payload Encapsulation:** Loads the final malware payload (Phemedrone Stealer) using AES encryption to hide it from static analysis and basic AV scans.
### Advanced Features
- **AV Evasion:** Incorporates techniques during the loading process to bypass common Anti-Virus solutions.
- **Dynamic Loading:** Employs a .NET loader to decrypt and execute the final payload in memory, complicating runtime analysis.
- **Information Theft:** The final payload is Phemedrone Stealer, designed for credential and information exfiltration.
## Indicators of Compromise
*Note: Specific IoCs (hashes, IPs, domains) are not provided in the source text, thus this section is based on expected behavior.*
- File Hashes: [Unknown]
- File Names: [Likely related to 'AnyDesk' or common Windows executables/DLLs during execution]
- Registry Keys: [Unknown]
- Network Indicators: [Likely C2 communications for command/control or data exfiltration associated with Phemedrone Stealer]
- Behavioral Indicators: Execution of a legitimate-looking application (AnyDesk clone) followed by in-memory decryption routines and process injection/memory manipulation commonly seen with .NET loaders.
## Associated Threat Actors
- [Unknown specific actor mentioned, but the delivery of Phemedrone Stealer suggests financially motivated cybercriminals or ransomware gangs.]
## Detection Methods
- [Signature-based detection] (For known Phemedrone execution artifacts post-decryption)
- [Behavioral detection] (Monitoring .NET applications performing fileless decryption of large memory regions or suspicious API calls associated with information harvesting)
- [YARA rules if available] (Rules targeting the specific AES decryption routine or the structure of the .NET loader)
## Mitigation Strategies
- [Prevention measures] (Strict application whitelisting, blocking execution from non-standard user profile locations)
- [Hardening recommendations] (Regular security awareness training emphasizing the dangers of downloading seemingly legitimate software from untrusted sources)
## Related Tools/Techniques
- Phemedrone Stealer (Final payload)
- .NET Loaders (General category of obfuscated execution frameworks)
- Masquerading as legitimate remote desktop software (e.g., AnyDesk, TeamViewer)