S0219: WINERACK
Analyst context for executives and security teams
WINERACK is documented by ATT&CK as a backdoor associated with APT37. The useful business takeaway is not a specific platform or detection rule—none is provided here—but that this software is linked to post-compromise discovery and command execution behaviors. For leaders, it is a reminder to validate whether endpoint, identity, and SOC telemetry can show an intruder learning which users, services, processes, files, and applications are present before taking follow-on action.
Executive priority
Treat WINERACK as a threat-intelligence-driven validation item for incident readiness. Because ATT&CK lists it as a backdoor and relates it to execution plus multiple discovery techniques, executives should ask whether the organization can rapidly answer: which hosts ran unusual commands, what users were active, what services and processes were enumerated, and what files or directories were inspected. This supports business continuity, audit evidence, and incident decision-making even when no WINERACK-specific detection content is available.
Technical view
ATT&CK provides no official detection text and no platform field for WINERACK, so SOC and IR teams should not assume coverage from a named signature alone. Use the relationships as validation scope: T1059 Command and Scripting Interpreter, plus discovery behaviors including System Service Discovery, Application Window Discovery, System Owner/User Discovery, Process Discovery, System Information Discovery, and File and Directory Discovery. Detection engineering should focus on correlated host activity where command execution is followed by broad enumeration of users, processes, services, windows, system details, or files, while tuning for legitimate administration and inventory tools.
Likely telemetry
- Endpoint process creation and command-line telemetry
- Script and command interpreter execution logs where available
- Service and scheduled task enumeration evidence
- Process listing and application/window enumeration evidence
- Logged-on user, session, and account context
Detection direction
- Validate that discovery behaviors related to T1007, T1010, T1033, T1057, T1082, and T1083 are visible after suspicious command execution under T1059.
- Build correlation around unusual clusters of discovery commands or API-driven enumeration rather than relying only on a WINERACK name match.
- Tune out known administrative, software inventory, monitoring, and helpdesk activity to reduce false positives.
- Confirm coverage gaps caused by missing endpoint command-line capture, limited script logging, or weak user/session context.
- Use the FireEye APT37 reference and ATT&CK mapping as intelligence context, not as proof of current exposure or active exploitation.
Mitigation priorities
- Prioritize reliable endpoint logging and retention for command execution and discovery activity.
- Apply least privilege so routine users and compromised accounts expose less service, process, and system detail than necessary.
- Harden and monitor command and scripting interpreter use according to business need.
- Maintain asset, service, and software inventories so suspicious enumeration can be compared against expected administration patterns.
- Prepare IR playbooks that can quickly scope hosts, users, commands, and discovery activity when a backdoor or related behavior is suspected.
Analyst notes and limits
The supplied ATT&CK object is sparse: WINERACK is described only as a backdoor used by APT37, with no official detection, no aliases, no labels, no tactics, and no object-level platforms. The strongest defensive value comes from the related ATT&CK techniques, which indicate execution and discovery behaviors defenders can validate in their own telemetry.
This take does not assert active exploitation, customer exposure, malware capabilities beyond the provided backdoor description, or platform-specific behavior for WINERACK. Local evidence, telemetry quality, and environment-specific baselines are required before making detection or risk conclusions.
WINERACK
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 | T1057 | Process Discovery | WINERACK can enumerate processes.CitationFireEye APT37 Feb 2018 |
| Enterprise | T1033 | System Owner/User Discovery | WINERACK can gather information on the victim username.CitationFireEye APT37 Feb 2018 |
| Enterprise | T1083 | File and Directory Discovery | WINERACK can enumerate files and directories.CitationFireEye APT37 Feb 2018 |
| Enterprise | T1010 | Application Window Discovery | WINERACK can enumerate active windows.CitationFireEye APT37 Feb 2018 |
| Enterprise | T1059 | Command and Scripting Interpreter | WINERACK can create a reverse shell that utilizes statically-linked Wine cmd.exe code to emulate Windows command prompt commands.CitationFireEye APT37 Feb 2018 |
| Enterprise | T1007 | System Service Discovery | WINERACK can enumerate services.CitationFireEye APT37 Feb 2018 |
| Enterprise | T1082 | System Information Discovery | WINERACK can gather information about the host.CitationFireEye APT37 Feb 2018 |
Groups, software, and campaigns
G0067: APT37
APT37 is a North Korean state-sponsored cyber espionage group that has been active since at least 2012. The group has targeted victims primarily in South Korea, but also in Japan, Vietnam, Russia, Nepal, China, India, Romania, Kuwait, and other parts of the Middle East. APT37 has also been linked to the following campaigns between 2016-2018: Operation Daybreak, Operation Erebus, Golden Time, Evil New Year, Are you Happy?, FreeMilk, North Korean Human Rights, and Evil New Year 2018.[1][2][3]
North Korean group definitions are known to have significant overlap, and some security researchers report all North Korean state-sponsored cyber activity under the name Lazarus Group instead of tracking clusters or subgroups.
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 (1)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.1 | 1.0 | Current bundle | ee41059e830a… |
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.
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[1]
FireEye APT37 Feb 2018
FireEye. (2018, February 20). APT37 (Reaper): The Overlooked North Korean Actor. Retrieved November 17, 2024.
Open source URL -
[2]
mitre-attack S0219Open source URL
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