Extortion teams that ship emails threatening firms with DDoS assaults except paid a sure price are making a comeback, safety agency Radware warned at present.
In a safety alert despatched to its clients and shared with ZDNet this week, Radware mentioned that over the last week of 2020 and the primary week of 2021, its clients obtained a brand new wave of DDoS extortion emails.
Extortionists threatened firms with crippling DDoS assaults except they acquired paid between 5 and 10 bitcoins ($150,000 to $300,000).
Radware mentioned that a few of the emails it seen had been despatched by a gaggle that was energetic over the 2020 summer time when the extortionists focused many monetary organizations the world over.
Corporations that obtained this group’s emails final summer time additionally obtained new threats over the winter, Radware mentioned.
The safety agency believes that the rise within the Bitcoin-to-USD price has led to some teams returning to or re-prioritizing DDoS extortion schemes.
However Radware mentioned that the Bitcoin price surge was so sudden and sudden that it caught even some teams abruptly. Extortionists additionally needed to adapt and scale back their calls for over time, going from requesting 10 BTC to five BTC, as in some circumstances, the extortion price would have been too massive for some firms to pay, because the Bitcoin price tripled since August 2020.
And identical to in the summertime of 2020, Radware mentioned that these DDoS extortion teams had the firepower to ship on their threats.
Radware mentioned it noticed some organizations being focused with DDoS assaults after receiving the extortion emails. Assaults usually lasted round 9 hours and ranged round 200 Gbps, with one assault peaking at 237 Gbps.
However this resurgence in DDoS extortion ways was additionally documented by Lumen’s Black Lotus Lab, which reported on their comeback final week.
The previous CenturyLink division, now a part of Lumen, mentioned these schemes by no means truly stopped, though the frequency of those e-mail threats died down over the autumn, in comparison with their prevalence over the summer time.
Similar to earlier than, the DDoS extortion gangs additionally saved utilizing the names of extra well-known hacking teams to ship their threats, hoping to intimidated victims. Attackers used names corresponding to Fancy Bear, Cozy Bear, Lazarus Group, and Armada Collective.
However in direction of the tip of the 12 months, Black Lotus Lab reported that a few of these extortion emails had been additionally signed utilizing the identify of Kadyrovtsy, the identify of an elite Chechen army group that has additionally been related to DDoS gangs and extortionists within the early 2010s.
Each Black Lotus Labs and Radware beneficial that firms not pay the ransom as this merely invitations extra extortions sooner or later. As an alternative, firms are suggested to request further safety towards any potential assaults from their safety suppliers.
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