Shuckworm maintains its focus on Ukrainian targets. Killnet's DDoS and dubious proof-of-work. Iron Tiger's supply chain campaign. TikTok and national security. Dinah Davis from Arctic Wolf shares insights on Dark Utilities. Rick Howard digs into identity management. And an arrest in the case of the Tornado Cash crypto mixer.

For links to all of today's stories check out our CyberWire daily news briefing:
https://thecyberwire.com/newsletters/daily-briefing/11/154

Selected reading.
Shuckworm: Russia-Linked Group Maintains Ukraine Focus (Symantec)
Killnet Releases 'Proof' of its Attack Against Lockheed Martin (SecurityWeek) 
Killnet greift lettisches Parlament an (Tagesspiegel)
Iron Tiger Compromises Chat Application Mimi, Targets Windows, Mac, and Linux Users (Trend Micro)
How Frustration Over TikTok Has Mounted in Washington (New York Times)
3 ways China's access to TikTok data is a security risk (CSO Online)
Arrest of suspected developer of Tornado Cash (FIOD)
Tornado Cash Developer Arrested After U.S. Sanctions the Cryptocurrency Mixer (The Hacker News)
Arrested Tornado Cash developer is Alexey Pertsev, his wife confirms (The Block)