Tortoiseshell
No sourced public emblem in this profile.
reference profile · reported nexus: IR (not nationality)
A previously undocumented attack group is using both custom and off-the-shelf malware to target IT providers in Saudi Arabia in what appear to be supply chain attacks with the end goal of compromising the IT providers’ customers. The group, which we are calling Tortoiseshell, has been active since at least July 2018. Symantec has identified a total of 11 organizations hit by the group, the majority of which are based in Saudi Arabia. In at least two organizations, evidence suggests that the attackers gained domain admin-level access.
Source-reported aliases: IMPERIAL KITTEN, Yellow Liderc, Imperial Kitten, TA456, DUSTYCAVE, Crimson Sandstorm, Cuboid Sandstorm, Smoke Sandstorm, CURIUM. Associations do not prove equivalence.
Target geography
Catalog-listed countries (associations, not attack counts): 
United States of America · 
Israel
No bound claim-post feed for this label.
Historical casebook
No dated record curated yet; absence does not establish inactivity.
Planned Kinwilder coverage
Tentative editorial review windows, contingent on evidence and review; not promised publication dates or predictions of attacks.
No assigned review window.
References
https://www.symantec.com/blogs/threat-intelligence/tortoiseshell-apt-supply-chain
https://ctoatncsc.substack.com/p/cto-at-ncsc-summary-week-ending-october
https://services.google.com/fh/files/misc/tool-of-first-resort-israel-hamas-war-cyber.pdf