At 02:17 UTC on March 19, a security researcher watching a major cloud provider’s console saw audit logs vanish from the original S3 bucket and appear in a newly created destination bucket—without a single alert firing.
This is the core of the bucket hijacking attack uncovered by The420.in, which demonstrates that threat actors can silently divert cloud audit logs, the digital fingerprints of every admin action, to a location they control.
How the attack works
The attacker first gains read‑write permissions on a victim’s storage bucket, often through mis‑configured IAM policies or compromised credentials. They then create a second bucket under their own account and modify the original bucket’s event notification configuration to forward all CloudTrail or audit‑log objects to the new bucket.
Because most monitoring tools watch the source bucket for changes, they miss the redirection. The cloud provider’s native alerting engines also rely on the original bucket’s metadata, so no “log missing” warning is generated.
Why does this matter?
Audit logs are the forensic backbone for breach investigations. If an attacker can hide their footprints, incident responders lose the ability to trace intrusions, attribute actions, or comply with regulations such as GDPR and HIPAA.
Enterprises that host critical workloads on AWS, Azure, or GCP could unknowingly operate in a blind spot, while attackers move laterally, exfiltrate data, and install ransomware with impunity.
Real‑world impact and numbers
Since the technique was disclosed, The420.in reports at least three separate incidents where financial services firms detected anomalous data transfers only after the hijacked logs were discovered during a manual audit.
In each case, the loss of log integrity delayed response times by an average of 72 hours, adding an estimated $1.2 million in remediation costs per breach.
Cloud‑security vendors are scrambling. Some have begun rolling out “log integrity checks” that compare checksum hashes between source and destination buckets, but adoption remains under 30 % among Fortune 500 firms.
What happens next?
Security teams should immediately audit bucket policies, enforce least‑privilege IAM roles, and enable multi‑region log replication that includes immutable storage classes.
Regulators may soon require proof‑of‑log‑integrity as part of audit frameworks, pushing the industry toward more transparent monitoring.
For more on how cloud misconfigurations fuel cyber conflict, see our coverage in technology and AI and the broader geopolitical implications in war‑geopolitics.
Stay tuned as cloud providers announce patches and as security researchers race to weaponize or defend against this silent intrusion vector.