MoustachedBouncer is an espionage group thought to operate from Belarus, with suspected state backing. Public reporting links it to 7 attack techniques, and to attacks on government organisations, with 4 countries and victims named. This free profile shows how it works and who it targets, so you can judge the risk to you.
MoustachedBouncer is tracked under one name in security research. Below is what published reporting says about it, with a link to every report so you can check the detail yourself.
What public reporting says
MoustachedBouncer is a cyberespionage group discovered by ESET Research and first publicly disclosed in August 2023. The group has been active since at least 2014 and only targets foreign embassies in Belarus. Since 2020, MoustachedBouncer has most likely been able to perform adversary-in-the-middle (AitM) attacks at the ISP level, within Belarus, in order to compromise its targets. The group uses two separate toolsets that we have named NightClub and Disco.
Public reports about MoustachedBouncer (1)
Each technique is a known way attackers research, get in, stay hidden or do damage. Here are the 7 linked to MoustachedBouncer, laid out from first look to final blow. Some techniques belong to more than one stage. Pick a stage to see them. Public reporting also lists 4 more specific variations of them, called sub-techniques.
Finding and bundling up the information they came for.
The sectors and places named in public reporting about this group. If yours is on the list, it is worth knowing how they work and which flaws they use.
Countries and victims named (4)
A public profile tells you who a group is. Your account tells you whether it matters to you: we match the software you run to the flaws threat groups use, and we keep watching, so you hear about anything that affects you as soon as we know.
MoustachedBouncer is an espionage group thought to operate from Belarus, with suspected state backing. Public reporting links it to 7 attack techniques, and to attacks on government organisations, with 4 countries and victims named.
Public reporting places MoustachedBouncer as operating from Belarus, with suspected state backing. Attribution is never certain: it rests on the tools, infrastructure and targets researchers have seen.
In public reporting, sectors named include government, and 4 countries and victims are named, including Europe, Eastern Europe, South Asia and Northeast Africa.
Public reporting links MoustachedBouncer to 7 attack techniques. Most of them are about gathering data, keeping contact with their servers and getting in.
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