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Threat Group Cards: A Threat Actor Encyclopedia

Permanent link Tool: NetFlash

NamesNetFlash
CategoryMalware
TypeDropper
Description(ESET) a .NET application that dropped an installer for Adobe Flash v32 in %TEMP%\adobe.exe, and NetFlash (a .NET downloader) in %TEMP%\winhost.exe.

According to their compilation timestamps, the malware samples were compiled at the end of August 2019 and at the beginning on September 2019, right before being uploaded to the watering hole’s C&C server.

NetFlash downloads its second stage malware from a hardcoded URL and establishes persistence for this new backdoor using a Windows scheduled task. Figure 5 shows the NetFlash function that downloads the second stage malware, named PyFlash.
Information<https://www.welivesecurity.com/2020/03/12/tracking-turla-new-backdoor-armenian-watering-holes/>
Malpedia<https://malpedia.caad.fkie.fraunhofer.de/details/win.netflash>
AlienVault OTX<https://otx.alienvault.com/browse/pulses?q=tag:NetFlash>

Last change to this tool card: 23 April 2021

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All groups using tool NetFlash

ChangedNameCountryObserved

APT groups

 Turla, Waterbug, Venomous BearRussia1996-Feb 2021 

1 group listed (1 APT, 0 other, 0 unknown)

Thailand Computer Emergency Response Team (ThaiCERT)
Electronic Transactions Development Agency

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