ESET - MoustachedBouncer: Espionage against foreign diplomats in Belarus

FanJ · Aug 10, 2023

MoustachedBouncer: Espionage against foreign diplomats in Belarus
ESET Research - by Matthieu Faou - 10 Aug 2023
https://www.welivesecurity.com/en/e...pionage-against-foreign-diplomats-in-belarus/

Long-term espionage against diplomats, leveraging email-based C&C protocols, C++ modular backdoors, and adversary-in-the-middle (AitM) attacks… Sounds like the infamous Turla? Think again!
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MoustachedBouncer is a cyberespionage group discovered by ESET Research and first publicly disclosed in this blogpost. 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.
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Conclusion

MoustachedBouncer is a skilled threat actor targeting foreign diplomats in Belarus. It uses quite advanced techniques for C&C communications including network interception at the ISP level for the Disco implant, emails for the NightClub implant, and DNS in one of the NightClub plugins.

The main takeaway is that organizations in foreign countries where the internet cannot be trusted should use an end-to-end encrypted VPN tunnel to a trusted location for all their internet traffic in order to circumvent any network inspection devices.
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ESET - MoustachedBouncer: Espionage against foreign diplomats in Belarus

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ESET - MoustachedBouncer: Espionage against foreign diplomats in Belarus

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