S1144: FRP
FRP, which stands for Fast Reverse Proxy, is an openly available tool that is capable of exposing a server located behind a firewall or Network Address Translation (NAT) to the Internet. FRP can support multiple protocols including TCP, UDP, and HTTP(S) and has been abused by threat actors to proxy command and control communications.[1][2][3][4]
Security context for executives and security teams
S1144: FRP describes [FRP](https://attack.mitre.org/software/S1144), which stands for Fast Reverse Proxy, is an openly available tool that is capable of exposing a server located behind a firewall or Network Address Translation (NAT) to the Internet. [FRP](https://attack.mitre.org/software/S1144) can support multiple protocols including TCP, UDP, and HTTP(S) and has been abused by threat actors to proxy command and control communications.(Citation: FRP GitHub)(Citation: Joint Cybersecurity Advisory Volt Typhoon June 2023)(Citation: Red...
Executive priority
S1144: FRP is an official MITRE ATT&CK software. Glexia treats it as defensive behavior context for prioritizing monitoring, control validation, and response planning without using the object by itself as an attribution claim.
Technical view
Security teams should validate S1144: FRP by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Linux, macOS, Windows), and available local telemetry before making detection or mitigation decisions.
Likely telemetry
- Official ATT&CK relationships and object metadata
- Network, endpoint, and security-tool telemetry
Detection direction
- Validate whether S1144: FRP appears in your detection coverage and tabletop scenarios.
- Use the object to align executive risk language with SOC, incident response, and detection engineering work.
- Do not treat ATT&CK relationship context as attribution without corroborating evidence.
Mitigation priorities
- Map the object to existing controls and identify missing telemetry or response ownership.
- Prioritize mitigations that reduce exposure on the listed platforms and tactics.
- Review adjacent ATT&CK relationships before changing policy, detections, or reporting language.
Additional notes and limits
Baseline Glexia take generated from the official MITRE ATT&CK STIX object, source hash, tactics, platforms, and detection fields. It is safe to replace with a richer model-generated take for the same source hash later.
This baseline take is source-grounded and schema-validated, but it does not include environment-specific telemetry, incident evidence, or threat-intelligence corroboration.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
FRP
FRP, which stands for Fast Reverse Proxy, is an openly available tool that is capable of exposing a server located behind a firewall or Network Address Translation (NAT) to the Internet. FRP can support multiple protocols including TCP, UDP, and HTTP(S) and has been abused by threat actors to proxy command and control communications.[1][2][3][4]
How security teams should use this page
Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.
Techniques used
This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.
| Domain | ID | Name | Relationship / procedure |
|---|---|---|---|
| Enterprise | T1095 | Non-Application Layer Protocol | |
| Enterprise | T1059.007 | JavaScriptSub-technique | |
| Enterprise | T1090 | Proxy | |
| Enterprise | T1572 | Protocol Tunneling | |
| Enterprise | T1573.002 | Asymmetric CryptographySub-technique | |
| Enterprise | T1046 | Network Service Discovery | |
| Enterprise | T1049 | System Network Connections Discovery | |
| Enterprise | T1090.003 | Multi-hop ProxySub-technique | |
| Enterprise | T1573.001 | Symmetric CryptographySub-technique | |
| Enterprise | T1071.001 | Web ProtocolsSub-technique |
Groups, software, and campaigns
G1017: Volt Typhoon
Volt Typhoon is a People's Republic of China (PRC) state-sponsored actor that has been active since at least 2021, primarily targeting critical infrastructure organizations in the US and its territories including Guam. Volt Typhoon's targeting and pattern of behavior have been assessed as pre-positioning to enable lateral movement to operational technology (OT) assets for potential destructive or disruptive attacks. Volt Typhoon has emphasized stealth in operations using web shells, living-off-the-land (LOTL) binaries, hands on keyboard activities, and stolen credentials.[1][2][3][4]. The group has leveraged compromised SOHO routers to proxy command and control traffic and obscure its infrastructure, activity associated with the KV botnet.[5].
Reporting indicates a separate initial access cluster, SYLVANITE, has been observed exploiting internet-facing edge devices and transferring access to Volt Typhoon, also tracked as VOLTZITE, for follow-on operations. [6]
G0108: Blue Mockingbird
Blue Mockingbird is a cluster of observed activity involving Monero cryptocurrency-mining payloads in dynamic-link library (DLL) form on Windows systems. The earliest observed Blue Mockingbird tools were created in December 2019.[1]
G0059: Magic Hound
Magic Hound is an Iranian-sponsored threat group that conducts long term, resource-intensive cyber espionage operations, likely on behalf of the Islamic Revolutionary Guard Corps. They have targeted European, U.S., and Middle Eastern government and military personnel, academics, journalists, and organizations such as the World Health Organization (WHO), via complex social engineering campaigns since at least 2014.[1][2][3][4][5]
C0043: Indian Critical Infrastructure Intrusions
Indian Critical Infrastructure Intrusions is a sequence of intrusions from 2021 through early 2022 linked to People’s Republic of China (PRC) threat actors, particularly RedEcho and Threat Activity Group 38 (TAG38). The intrusions appear focused on IT system breach in Indian electric utility entities and logistics firms, as well as potentially managed service providers operating within India. Although focused on OT-operating entities, there is no evidence this campaign was able to progress beyond IT breach and information gathering to OT environment access.[1][2]
C0057: 3CX Supply Chain Attack
The 3CX Supply Chain Attack was the first publicly reported case of one supply chain compromise triggering another, leading to a cascading, two-stage intrusion. The initial supply chain attack began when a 3CX employee downloaded and executed a trojanized, end-of-life version of the X_Trader trading software from Trading Technologies. This provided UNC4736, a threat cluster associated with AppleJeus, access to the 3CX environment. From there UNC4736 compromised the Windows and macOS build environments used to distribute the 3CX desktop application to their customers.[1] While 3CX serves more than 600,000 customers and 12 million users, only a subset of systems were affected. Subsequent targeting focused on victims in the defense and cryptocurrency sectors, where attackers deployed secondary payloads such as Gopuram for credential theft and persistence.[2] The campaign began in late 2022 and was disrupted after security vendors publicly reported the compromise in March 2023.[3][4]
C0060: Operation AkaiRyū
Operation AkaiRyū (Japanese for RedDragon) was a cyberespionage spearphishing campaign conducted by MirrorFace between June and September 2024 against entities in Japan and Central Europe. Operation AkaiRyū notably included the first reported targeting of a European entity by MirrorFace, as well as their use of UPPERCUT, which was thought to be exclusive to menuPass.[1][2]
All related ATT&CK context
Object version and sync metadata
The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates.
Imported snapshots across ATT&CK releases(2)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.2 | 1.1 | Current bundle | 0ecefc26889f… | ||
| 19.1 | 1.1 | Older bundle | 0ecefc26889f… |
Mirrored ATT&CK source object
The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.
External references and citations
MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.
- [1]FRP GitHub
fatedier. (n.d.). What is frp?. Retrieved July 10, 2024.
Open source URL - [2]Joint Cybersecurity Advisory Volt Typhoon June 2023
NSA et al. (2023, May 24). People's Republic of China State-Sponsored Cyber Actor Living off the Land to Evade Detection. Retrieved July 27, 2023.
Open source URL - [3]RedCanary Mockingbird May 2020
Lambert, T. (2020, May 7). Introducing Blue Mockingbird. Retrieved May 26, 2020.
Open source URL - [4]DFIR Phosphorus November 2021
DFIR Report. (2021, November 15). Exchange Exploit Leads to Domain Wide Ransomware. Retrieved January 5, 2023.
Open source URL - [5]mitre-attackS1144Open source URL
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