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MoustachedBouncer is a Belarus-aligned cyber-espionage actor focused on surveillance of foreign diplomats located in Belarus. Also tracked as Storm-1125 and MoushtachedBouncer, the group is assessed to conduct adversary-in-the-middle operations using ISP-level visibility and traffic interception capabilities. It has intercepted connections associated with widely used Microsoft connectivity and update services to deliver malware to selected victims. MoustachedBouncer operates the Disco and NightClub malware families. Disco is a Go-based modular implant used to execute surveillance plugins and exfiltrate collected information over channels including SMTP/IMAP, DNS, and SMB. NightClub is a C++ modular surveillance family that has operated since at least 2014 and includes file-collection, audio-recording, screenshot, keylogging, and DNS-tunneling capabilities. The group has also used PowerShell, reverse-proxy tooling, and local privilege-escalation exploits, including CVE-2021-1732. Its primary assessed motivation is espionage in support of Belarusian state interests.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
39 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
8 malware families attributed to this actor across reporting.
3 additional families tracked in Mallory.
3 CVEs this actor has used in observed campaigns. 3 of them exploited in the wild.
Executes C:\Users\Public\driverpack\driverpackUpdate.exe (the plugin above) using elevated rights via CVE-2021-1732.
This detection identifies instances where Windows Explorer.exe spawns PowerShell or cmd.exe processes, particularly focusing on executions initiated by LNK files. This behavior is associated with the ZDI-CAN-25373 Windows shortcut zero-day vulnerability, where specially crafted LNK files are used to trigger malicious code execution through cmd.exe or powershell.exe. This technique has been actively exploited by multiple APT groups in targeted attacks through both HTTP and SMB delivery methods.
The following analytic detects when su runs from a page-cache-corrupted binary... This activity is significant because it indicates a possible privilege escalation attempt, allowing a user to gain root access... CVE CVE-2026-31431 ... References ... copy-fail-CVE-2026-31431
12 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
MoustachedBouncer is listed in the detection's annotations.
Listed as an associated threat actor for the JavaScript-execution technique.
MoustachedBouncer is listed in the detection's threat-actor annotations.
Listed in the detection's APT annotations.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.