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Threat Group Cards: A Threat Actor Encyclopedia

Tool: Necurs

Names	Necurs nucurs
Category	Malware
Type	Botnet, Downloader
Description	(Blueliv) It affects mainly Asian and European countries, but with more than 1.5 million infected computers, it also has active bots across almost every continent. The current number of related bots online is about 1,350,000, but each day more users are infected. Necurs is modular malware with a lot of features, but it is mainly known for sending large spam campaigns via email. This large botnet is actually formed by 7 smaller botnets put together using the same malware. Blueliv’s Threat Intelligence Lab team has performed a deep and detailed malware-reversal analysis on Necurs.
Information	<https://www.blueliv.com/necurs-one-of-the-worlds-biggest-botnets-today/> <https://blog.avast.com/botception-with-necurs-botnet-distributes-script-with-bot-capabilities-avast-threat-labs> <https://www.bitsighttech.com/blog/necurs-proxy-module-with-ddos-features> <http://blog.talosintelligence.com/2017/03/necurs-diversifies.html> <https://www.blueliv.com/wp-content/uploads/2018/07/Blueliv-Necurs-report-2017.pdf> <https://blog.trendmicro.com/trendlabs-security-intelligence/necurs-evolves-to-evade-spam-detection-via-internet-shortcut-file/> <https://www.trustwave.com/Resources/SpiderLabs-Blog/Necurs-Recurs/> <https://blog.trendmicro.com/trendlabs-security-intelligence/the-new-face-of-necurs-noteworthy-changes-to-necurs-behaviors> <https://cofense.com/necurs-targeting-banks-pub-file-drops-flawedammyy/> <https://www.cert.pl/en/news/single/necurs-hybrid-spam-botnet/> <https://en.wikipedia.org/wiki/Necurs_botnet>
Malpedia	<https://malpedia.caad.fkie.fraunhofer.de/details/win.necurs>
AlienVault OTX	<https://otx.alienvault.com/browse/pulses?q=tag:Necurs>

Last change to this tool card: 14 May 2020

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All groups using tool Necurs

Changed	Name	Country	Observed
Other groups
	Monty Spider		2012-Mar 2020

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

Digital Service Security Center
Electronic Transactions Development Agency

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