The U.S. Department of Justice seized about US$2.3 million in bitcoin ransom paid to the hackers behind the attack on Colonial Pipeline.
An affidavit filed on Monday said the FBI was in possession of a private key to unlock a bitcoin wallet that had received most of the funds. It was unclear how the FBI gained access to the key.
« unclear how the FBI gained access. » From other sources it sounds like the FBI used a subpoena and gained control over the rented cloud server the hackers were using. Private key sitting on the server, it seems.
Check It Out: $2.3 Million Bitcoin Seized from Colonial Pipeline Hackers

Great story today in the WSJ. https://apple.news/A7xcVNrrRSNeX_TVje3gzZA
Made my day.
“unclear how the FBI gained access.” Keep it unclear, they will need to use the the procedure again.
« For years, the underworld thought its phones were safe. They fell for an encrypted app trap »
https://www.cnn.com/2021/06/08/australia/afp-fbi-anom-app-operation-ironside/index.html