Remsec
MITRE ATT&CK: S0125 View on attack.mitre.org
Aliases: Backdoor.Remsec, ProjectSauron, Remsec
- First seen
- 2011-03-01 00:00:00
- Malware type
- backdoor, spyware
- Family
- Malware family
- Operating systems
- windows
- Last IoC activity
- 2026-07-15 16:45:04
- Profile updated
- 2026-07-07 15:44:54
Targeted industries: government-and-public-sector technology-and-telecommunications
Targeted regions: country_code:ru country_code:cn country_code:us
Context
Remsec is a modular backdoor that has been used by Strider and appears to have been designed primarily for espionage purposes. Many of its modules are written in Lua.
Detection coverage
- 1 YARA rules
- 410 Sigma rules
Malware & tools used
- Dynamic-link Library Injection (attack-pattern)
- Exploitation for Privilege Escalation (attack-pattern)
- Exfiltration over USB (attack-pattern)
- File and Directory Discovery (attack-pattern)
- Windows Host Firewall (attack-pattern)
- Exfiltration Over Unencrypted Non-C2 Protocol (attack-pattern)
- System Network Connections Discovery (attack-pattern)
- File Deletion (attack-pattern)
- Keylogging (attack-pattern)
- Process Discovery (attack-pattern)
- Encrypted/Encoded File (attack-pattern)
- Password Filter DLL (attack-pattern)
- Match Legitimate Resource Name or Location (attack-pattern)
- Non-Application Layer Protocol (attack-pattern)
- Remote System Discovery (attack-pattern)
- Mail Protocols (attack-pattern)
- Lua (attack-pattern)
- Ingress Tool Transfer (attack-pattern)
- Security Account Manager (attack-pattern)
- Data from Removable Media (attack-pattern)
- Scheduled Task (attack-pattern)
- System Information Discovery (attack-pattern)
- Local Account (attack-pattern)
- System Network Configuration Discovery (attack-pattern)
- System Owner/User Discovery (attack-pattern)
Used by threat actors
- Strider (threat-actor)
Detection rules
- MALPEDIA_Win_Remsec_Strider_Auto (yara-rule)
Reports & references
- Broadcom/Symantec — Viewdocument (report)
- Broadcom/Symantec — Strider Cyberespionage Group Turns Eye Sauron Targets (report)
- Kaspersky — 75533 (report)
- malpedia.caad.fkie.fraunhofer.de — Win.Remsec Strider (report)
- artemonsecurity.blogspot.com — Remsec Driver Analysis (report)
- artemonsecurity.blogspot.com — Remsec Driver Analysis Part 2 (report)
- Broadcom/Symantec — Symantec Remsec Iocs (report)
- artemonsecurity.blogspot.com — Remsec Driver Analysis Part 3 (report)
- MITRE ATT&CK — S0125 (report)