S0157: SOUNDBITE
Analyst context for executives and security teams
SOUNDBITE is a Windows backdoor documented by MITRE as used by APT32. Its practical significance is not just the malware name, but the behaviors attached to it: DNS-based command-and-control, host and file discovery, application window discovery, and Windows Registry modification. For leaders, this is a reminder that backdoor readiness depends on whether the organization can connect endpoint behavior, registry changes, and DNS activity into an incident picture quickly.
Executive priority
Prioritize SOUNDBITE as a validation case for Windows endpoint visibility and DNS monitoring rather than as a standalone malware signature problem. The business decision is whether SOC and IR teams can prove they collect the evidence needed to identify backdoor activity, scope affected systems, and support audit or incident reporting. Because MITRE provides no official detection text for this object, coverage should be demonstrated through local telemetry and ATT&CK technique-level detections tied to the related behaviors.
Technical view
ATT&CK lists SOUNDBITE as Windows malware and relates it to Application Window Discovery, DNS command-and-control, System Information Discovery, File and Directory Discovery, and Modify Registry. Detection engineering should validate behavior-level coverage across those relationships: endpoint process activity that performs discovery, registry modification events, file system enumeration, and DNS traffic patterns that may indicate command-and-control. Since the object itself has no specified tactics and no official detection guidance, teams should avoid relying on the software name alone and instead map detections to the related ATT&CK techniques.
Likely telemetry
- Windows endpoint process execution and command-line/activity metadata
- Windows Registry modification events
- File and directory enumeration activity from endpoint telemetry
- DNS query and response logs from resolvers, endpoints, or network sensors
- Network connection metadata associated with DNS activity
Detection direction
- Confirm that DNS monitoring is retained and searchable enough to support command-and-control investigations, not only domain blocking.
- Tune detections around unusual or scripted discovery activity, while accounting for legitimate administration, inventory, and software management tools.
- Validate registry modification monitoring on Windows systems, especially changes relevant to persistence or defense impairment, without assuming every registry write is malicious.
- Correlate discovery activity, registry changes, and DNS activity on the same host to reduce false positives and improve incident triage value.
- Use the APT32 relationship as threat-intelligence context, not as proof of attribution in a local incident.
Mitigation priorities
- Ensure Windows endpoints have logging and EDR coverage sufficient for process, registry, file discovery, and network investigation.
- Centralize and retain DNS telemetry so responders can scope suspicious command-and-control patterns across hosts.
- Harden and monitor registry areas commonly abused for persistence or defense impairment, with change control for legitimate administrative activity.
- Maintain incident response playbooks for suspected backdoor activity, including host isolation, DNS/network scoping, and credential-risk review where local evidence supports it.
- Use ATT&CK technique mappings for control validation and compliance evidence because the SOUNDBITE entry itself does not provide detection procedures.
Analyst notes and limits
The most useful defensive reading is behavior-led: SOUNDBITE is a named backdoor, but the supplied relationships provide the actionable validation areas. The APT32 relationship supplies threat context from the official ATT&CK relationship, while local telemetry is required before making any attribution or exposure judgment.
MITRE provides a brief description and no official detection text for SOUNDBITE. The object has no specified tactics and only Windows is supplied as the malware platform. This take does not assert active exploitation, current targeting, customer exposure, or guaranteed detection coverage.
SOUNDBITE
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 | T1082 | System Information Discovery | SOUNDBITE is capable of gathering system information.CitationFireEye APT32 May 2017 |
| Enterprise | T1112 | Modify Registry | SOUNDBITE is capable of modifying the Registry.CitationFireEye APT32 May 2017 |
| Enterprise | T1071.004 | DNS Sub-technique | SOUNDBITE communicates via DNS for C2.CitationFireEye APT32 May 2017 |
| Enterprise | T1010 | Application Window Discovery | SOUNDBITE is capable of enumerating application windows.CitationFireEye APT32 May 2017 |
| Enterprise | T1083 | File and Directory Discovery | SOUNDBITE is capable of enumerating and manipulating files and directories.CitationFireEye APT32 May 2017 |
Groups, software, and campaigns
G0050: APT32
APT32 is a suspected Vietnam-based threat group that has been active since at least 2014. The group has targeted multiple private sector industries as well as foreign governments, dissidents, and journalists with a strong focus on Southeast Asian countries like Vietnam, the Philippines, Laos, and Cambodia. They have extensively used strategic web compromises to compromise victims.[1][2][3]
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 | 1.1 | Current bundle | bd448b1aae0c… |
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]
FireEye APT32 May 2017
Carr, N.. (2017, May 14). Cyber Espionage is Alive and Well: APT32 and the Threat to Global Corporations. Retrieved June 18, 2017.
Open source URL -
[2]
SOUNDBITE
(Citation: FireEye APT32 May 2017)
-
[3]
mitre-attack S0157Open source URL
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.