Coinspect has identified CryptoJS.lib.WordArray.random() as the weak random number generator behind the Ill Bloom wallet drains.

Introduced in the JavaScript cryptography library 12 years ago, the function supplied weak entropy that affected wallet apps used to generate recovery phrases. Coinspect’s on-chain analysis puts the measured theft across two sweeps since late May at a lower bound of roughly $5.7 million.

The blockchain security firm, which coined the Ill Bloom name in July, has now confirmed five applications that used the generator as an entropy source for recovery-phrase generation:

• RRWallet, which Coinspect says is discontinued. No fix.
• Bexo Wallet, which Coinspect says has been fixed in version 20.1.0, although…