Mk4 is a technology platform tracked by ThreatCluster, appearing in 1 threat cluster built from 1 intelligence report mention.
Mk4 is a technology platform tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed August 1, 2026; most recent activity August 1, 2026.
A significant firmware vulnerability in Coldcard hardware wallets allowed attackers to exploit weak seed generation, resulting in the theft of approximately 1,367 BTC (around $70 million) from nearly 1,200 wallets. The…
Mk4 is a technology platform tracked by ThreatCluster, appearing in 1 threat cluster built from 1 intelligence report mention.
The most recent intelligence report mentioning Mk4 on ThreatCluster is dated August 1, 2026.
Across ThreatCluster reporting, Mk4 most frequently co-occurs with Coinkite, Coldcard, MicroPython, Mk3, Mk5, among 9 tracked related entities.
The most significant recent cluster is “Coldcard Firmware Flaw Leads to $70M Bitcoin Theft” (18 articles · Updated August 2, 2026). Mk4 appears across 1 threat cluster in total, listed above with sources.
Mk4 appears in 1 intelligence report mention across 1 deduplicated threat cluster, aggregated from 17,000+ monitored sources.