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MITRE ATT&CK® Malware

S1219: REPTILE

REPTILE is an open-source Linux rootkit with multiple components that provides backdoor access and functionality.[1]

EnterpriseS1219MalwareObject v1.0Modified
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Glexia's Take · Automated analysis

Security context for executives and security teams

Automation confidenceMedium

S1219: REPTILE describes [REPTILE](https://attack.mitre.org/software/S1219) is an open-source Linux rootkit with multiple components that provides backdoor access and functionality.(Citation: Google Cloud Mandiant UNC3886 2024)

Executive priority

S1219: REPTILE 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 S1219: REPTILE by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Linux), 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 S1219: REPTILE 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.

Official MITRE ATT&CK definition

REPTILE

REPTILE is an open-source Linux rootkit with multiple components that provides backdoor access and functionality.[1]

View the same entry on attack.mitre.org (MITRE-hosted reference; in-page links above use the Glexia ATT&CK library.)

Glexia analysis

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.

ATT&CK relationship table

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.

11 rows
DomainIDNameRelationship / procedure
EnterpriseT1543.004Launch DaemonSub-technique

The REPTILE launcher can daemonize a process.[1]

EnterpriseT1573.002Asymmetric CryptographySub-technique

REPTILE can use TLS over raw TCP for secure C2.[1]CitationMandiant Fortinet Zero Day

EnterpriseT1205.001Port KnockingSub-technique

REPTILE has the ability to control compromised endpoints via port knocking.[1]

EnterpriseT1546.017Udev RulesSub-technique

REPTILE has used udev for persistence.[1]

EnterpriseT1564.001Hidden Files and DirectoriesSub-technique

REPTILE has the ability to communicate with the kernel-mode component to hide files.[1]

EnterpriseT1140Deobfuscate/Decode Files or Information

The REPTILE launcher component can decrypt kernel module code from a file and load it into memory.[1]

EnterpriseT1205Traffic Signaling

The REPTILE reverse shell component can listen for a specialized packet in TCP, UDP, or ICMP for activation.[1]CitationMandiant Fortinet Zero Day

EnterpriseT1059.004Unix ShellSub-technique

REPTILE can deploy components automatically with shell scripts.[1]

EnterpriseT1014Rootkit

REPTILE has the ability to hook kernel functions and modify functions data to achieve rootkit functionality such as hiding processes and network connections.[1]

EnterpriseT1095Non-Application Layer Protocol

REPTILE can communicate using TLS over raw TCP.[1]CitationMandiant Fortinet Zero Day

EnterpriseT1547.006Kernel Modules and ExtensionsSub-technique

The REPTILE rootkit is implemented as a loadable kernel module (LKM).[1]

Associated objects

Groups, software, and campaigns

GroupEnterprise

G1048: UNC3886

UNC3886 is a China-nexus cyberespionage group that has been active since at least 2022, targeting defense, technology, and telecommunication organizations located in the United States and the Asia-Pacific-Japan (APJ) regions. UNC3886 has displayed a deep understanding of edge devices and virtualization technologies through the exploitation of zero-day vulnerabilities and the use of novel malware families and utilities.[1][2]

CampaignEnterprise

C0056: RedPenguin

The RedPenguin project was launched by Juniper in July 2024 to investigate reported malware infections of Juniper MX Series routers. RedPenguin activity was separately attributed to UNC3886 and included the deployment of multiple custom versions of the publicly-available TINYSHELL backdoor on Juniper routers.[1][2]

Relationship explorer

All related ATT&CK context

uses · CampaignC0056: RedPenguinEnterpriseuses · GroupG1048: UNC3886Enterpriseuses · TechniqueT1543.004: Launch DaemonEnterpriseuses · TechniqueT1573.002: Asymmetric CryptographyEnterpriseuses · TechniqueT1205.001: Port KnockingEnterpriseuses · TechniqueT1546.017: Udev RulesEnterpriseuses · TechniqueT1564.001: Hidden Files and DirectoriesEnterpriseuses · TechniqueT1140: Deobfuscate/Decode Files or InformationEnterpriseuses · TechniqueT1205: Traffic SignalingEnterpriseuses · TechniqueT1059.004: Unix ShellEnterpriseuses · TechniqueT1014: RootkitEnterpriseuses · TechniqueT1095: Non-Application Layer ProtocolEnterpriseuses · TechniqueT1547.006: Kernel Modules and ExtensionsEnterprise
Change history

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.

ATT&CK release
19.2
Object version
1.0
Created
Modified
Raw hash
04a87d3e03f33d5d...
Imported snapshots across ATT&CK releases(2)
ReleaseBundle importedObject versionModifiedStatusRaw hash
19.21.0Current bundle04a87d3e03f3…
19.11.0Older bundle04a87d3e03f3…
Raw source

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.

Open mirrored raw JSONOpen MITRE-hosted copy
Source references

External references and citations

MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.

  1. [1]
    Google Cloud Mandiant UNC3886 2024

    Punsaen Boonyakarn, Shawn Chew, Logeswaran Nadarajan, Mathew Potaczek, Jakub Jozwiak, and Alex Marvi. (2024, June 18). Cloaked and Covert: Uncovering UNC3886 Espionage Operations. Retrieved September 24, 2024.

    Open source URL
  2. [2]
    mitre-attackS1219
    Open source URL
Source and licensing

Source: MITRE ATT&CK®. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation. Glexia is not affiliated with or endorsed by MITRE.

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