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# Ill Bloom: A Weak Seed-Phrase Generator Drained Over $5M From Crypto Wallets
- URL: https://www.russianhackers.co/ill-bloom-weak-seed-phrase-drains-crypto-wallets/
- Published: 2026-07-16T20:37:14.000Z
- Updated: 2026-07-16T20:37:14.000Z
- Author: Martin
- Tags: Breaches, Hackers

Researchers at Coinspect have disclosed Ill Bloom, a vulnerability in how several cryptocurrency wallets generate their mnemonic recovery phrases (seed phrases). Exploiting it, attackers emptied hundreds of wallets in a single pass and made off with more than $5.1 million.

The problem is not one specific wallet but the phrase-generation method used by a handful of lesser known apps, mobile and browser extensions, some dating back to 2018\. These wallets relied on a weak random number generator, which shrank the pool of possible seed phrases from astronomically large to something an attacker could search. From there it was a matter of reconstructing the full set of weak phrases, deriving the corresponding addresses, and checking the blockchain for which ones held funds. Such wallets look normal, their word lists appear random, yet the phrase can be brute forced and every balance across every connected chain drained.

The main blow came on May 27, 2026: in a coordinated sweep, roughly $3.1 million was pulled from 431 wallets within hours, with funds from unrelated wallets flowing to the same collection addresses. A second, opportunistic theft followed on June 10, when $2.1 million in USDT was taken from a single exposed wallet. Bitcoin was hit hardest, around $2.57 million, with more than $1.1 million gone from one address. By June 30, Coinspect counted 2,114 vulnerable addresses across Bitcoin, Ethereum, Rootstock, Tron, and Polygon, and the number keeps growing.

The attacker's identity has not been disclosed, and no CVE has been assigned. Coinspect has launched a free checker at illbloom.org and advises owners of potentially affected wallets to treat their recovery phrase as compromised even if the funds are still in place: create a new wallet with a new phrase and move the assets there, without importing the old phrase into other apps. The firm stresses that a genuine checker never asks for secrets and will never request seed phrases, private keys, signatures, or transaction approvals.

Ill Bloom continues a string of similar weak-key incidents. Funds have been drained the same way before, through the Milk Sad bug (CVE-2023-39910) in Libbitcoin Explorer and a flaw in the Trust Wallet browser extension (CVE-2023-31290), as well as the Randstorm campaign that affected Bitcoin wallets created between 2011 and 2015.

*Based on reporting by The Hacker News and Coinspect.*