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Threat Group Cards: A Threat Actor Encyclopedia

Permanent link Tool: Karkoff

NamesKarkoff
MailDropper
DropperBackdoor
CategoryMalware
TypeBackdoor, Dropper
Description(Talos) In April, Cisco Talos identified an undocumented malware developed in .NET. On the analyzed samples, the malware author left two different internal names in plain text: 'DropperBackdoor' and 'Karkoff.' We decided to use the second name as the malware's moniker, as it is less generic. The malware is lightweight compared to other malware due to its small size and allows remote code execution from the C2 server. There is no obfuscation and the code can be easily disassembled.
Information<https://blog.talosintelligence.com/2019/04/dnspionage-brings-out-karkoff.html>
Malpedia<https://malpedia.caad.fkie.fraunhofer.de/details/win.karkoff>
AlienVault OTX<https://otx.alienvault.com/browse/pulses?q=tag:Karkoff>

Last change to this tool card: 22 April 2020

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All groups using tool Karkoff

ChangedNameCountryObserved

APT groups

 DNSpionageIran2019-Apr 2019 
 OilRig, APT 34, Helix Kitten, ChryseneIran2014-Jan 2021X

2 groups listed (2 APT, 0 other, 0 unknown)

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

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