S0690: Green Lambert
Green Lambert is a modular backdoor that security researchers assess has been used by an advanced threat group referred to as Longhorn and The Lamberts. First reported in 2017, the Windows variant of Green Lambert may have been used as early as 2008; a macOS version was uploaded to a multiscanner service in September 2014.[1][2]
Security context for executives and security teams
S0690: Green Lambert describes [Green Lambert](https://attack.mitre.org/software/S0690) is a modular backdoor that security researchers assess has been used by an advanced threat group referred to as Longhorn and The Lamberts. First reported in 2017, the Windows variant of [Green Lambert](https://attack.mitre.org/software/S0690) may have been used as early as 2008; a macOS version was uploaded to a multiscanner service in September 2014.(Citation: Kaspersky Lamberts Toolkit April 2017)(Citation: Objective See Green Lambert for OSX Oct 2021)
Executive priority
S0690: Green Lambert 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 S0690: Green Lambert by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Windows, iOS, macOS, 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 S0690: Green Lambert 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.
Green Lambert
Green Lambert is a modular backdoor that security researchers assess has been used by an advanced threat group referred to as Longhorn and The Lamberts. First reported in 2017, the Windows variant of Green Lambert may have been used as early as 2008; a macOS version was uploaded to a multiscanner service in September 2014.[1][2]
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 | T1543.004 | Launch DaemonSub-technique | Green Lambert can add a plist file in the `Library/LaunchDaemons` to establish persistence.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1555.001 | KeychainSub-technique | Green Lambert can use Keychain Services API functions to find and collect passwords, such as `SecKeychainFindInternetPassword` and `SecKeychainItemCopyAttributesAndData`.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1082 | System Information Discovery | Green Lambert can use `uname` to identify the operating system name, version, and processor type.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1071.004 | DNSSub-technique | Green Lambert can use DNS for C2 communications.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1140 | Deobfuscate/Decode Files or Information | Green Lambert can use multiple custom routines to decrypt strings prior to execution.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1016 | System Network Configuration Discovery | Green Lambert can obtain proxy information from a victim's machine using system environment variables.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1090 | Proxy | Green Lambert can use proxies for C2 traffic.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1547.015 | Login ItemsSub-technique | Green Lambert can add Login Items to establish persistence.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1070.004 | File DeletionSub-technique | Green Lambert can delete the original executable after initial installation in addition to unused functions.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1005 | Data from Local System | Green Lambert can collect data from a compromised host.[2] |
| Enterprise | T1027 | Obfuscated Files or Information | Green Lambert has encrypted strings.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1059.004 | Unix ShellSub-technique | Green Lambert can use shell scripts for execution, such as |
| Enterprise | T1546.004 | Unix Shell Configuration ModificationSub-technique | Green Lambert can establish persistence on a compromised host through modifying the `profile`, `login`, and run command (rc) files associated with the `bash`, `csh`, and `tcsh` shells. [2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1543.001 | Launch AgentSub-technique | Green Lambert can create a Launch Agent with the `RunAtLoad` key-value pair set to |
| Enterprise | T1037.004 | RC ScriptsSub-technique | Green Lambert can add |
| Enterprise | T1036.004 | Masquerade Task or ServiceSub-technique | Green Lambert has created a new executable named `Software Update Check` to appear legitimate.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1036.005 | Match Legitimate Resource Name or LocationSub-technique | Green Lambert has been disguised as a Growl help file.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
| Enterprise | T1124 | System Time Discovery | Green Lambert can collect the date and time from a compromised host.[2]CitationGlitch-Cat Green Lambert ATTCK Oct 2021 |
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(3)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 20.0 | 1.0 | Current bundle | 57f9d6092e67… | ||
| 19.2 | 1.0 | Older bundle | 57f9d6092e67… | ||
| 19.1 | 1.0 | Older bundle | 57f9d6092e67… |
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]Kaspersky Lamberts Toolkit April 2017
GREAT. (2017, April 11). Unraveling the Lamberts Toolkit. Retrieved March 21, 2022.
Open source URL - [2]Objective See Green Lambert for OSX Oct 2021
Sandvik, Runa. (2021, October 1). Made In America: Green Lambert for OS X. Retrieved March 21, 2022.
Open source URL - [3]Green Lambert
(Citation: Kaspersky Lamberts Toolkit April 2017)
- [4]mitre-attackS0690Open source URL
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