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SOUNDBITE is a Windows backdoor associated with the Vietnam-aligned espionage group APT32, also known as OceanLotus. It has been identified as part of APT32’s custom malware ecosystem alongside families such as WINDSHIELD, PHOREAL, KOMPROGO, and later SPECTRALVIPER, and has been used in targeted intrusions against private-sector organizations, foreign governments, journalists, dissidents, and other entities of intelligence interest. Reported victim sectors and geographies tied to APT32 operations involving SOUNDBITE include consumer products organizations and other enterprises with business interests connected to Vietnam.
Observed SOUNDBITE behavior includes enumerating application windows on compromised hosts and modifying the Windows Registry. Window enumeration can support operator awareness of user activity and application context, while Registry modification has been used by APT32 backdoors to store configuration data and support persistence or operational control. The malware is part of broader intrusion chains in which APT32 commonly relied on spearphishing with socially engineered document lures that prompted macro execution and led to deployment of multiple payloads and scheduled-task-based persistence. SOUNDBITE is therefore best understood as one component of a mature espionage toolkit used in long-running, targeted collection operations aligned with Vietnamese state interests.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
1 CVE Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.
During one investigation, APT32 was observed using a privilege escalation exploit (CVE-2016-7255) masquerading as a Windows hotfix.
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
Some of the key tools in its arsenal include SOUNDBITE (aka Denis), PHOREAL (aka Rizzo), WINDSHIELD (aka Remy), and, more recently, SPECTRALVIPER...
10 distinct techniques documented for this family, organized by ATT&CK tactic.
Multiple malware families are described as identifying/enumerating open windows or capturing foreground window titles (e.g., via EnumWindows, GetForegroundWindow, GetWindowText) to understand user activity and provide context for keylogging/screencapture.
The content repeatedly describes malware and threat actors collecting host details such as hostname, OS version, architecture, CPU, memory, BIOS, language, and other machine characteristics; e.g., "Action RAT has the ability to collect the hostname, OS version, and OS architecture of an infected host."
61 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
IPs, domains, and DNS infrastructure linked to this family.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A malware tool identified as part of OceanLotus's arsenal.
Backdoor capable of modifying the Windows Registry.
Backdoor using DNS for C2, with process creation, file upload, shell command execution, file/directory and registry manipulation, window enumeration, and system information gathering.
Backdoor capable of modifying the Registry.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.