Host Wiped Before Forensic Acquisition

The compromised host has been zeroed or securely wiped (DBAN, `dd if=/dev/zero`, `sdelete`, `shred`) before forensic imaging could begin. Traditional filesystem-carving techniques recover limited content; the investigation must pivot to peer-host artifacts, network telemetry, and cloud/identity records that survived the wipe.

Signals

  • •Target disk is fully zeroed with no recognizable filesystem or slack-space content
  • •Sequential 4KB blocks of repeated zero bytes detected across the entire device
  • •System clock of the wipe event visible in BMC/IPMI logs or the last UEFI firmware event

Pivot Actions

  1. 1.Capture BMC/IPMI, UEFI firmware, and TPM event logs that survive disk wipe -- wipe tools rarely touch firmware-resident logs
  2. 2.Pull peer-host artifacts (adjacent endpoints, domain controllers, network devices) that captured lateral movement from the wiped host
  3. 3.Request backup-system restoration of the last pre-wipe snapshot if backup software was configured for the host
  4. 4.Harvest network telemetry (flow records, DNS logs, proxy logs, firewall logs) covering the wiped host's IP and MAC address history
  5. 5.Review cloud/identity traces (Azure AD, Okta, CloudTrail) for authentication, API usage, and file access originating from the wiped host

Alternate Evidence Sources

  • •BMC/IPMI out-of-band management logs preserved on the management controller, not the wiped disk
  • •TPM PCR event log entries providing firmware and boot-time attestation evidence
  • •Backup snapshots (Veeam, Commvault, Rubrik, AWS Backup) predating the wipe event
  • •Network-level evidence (NetFlow, IDS/IPS alerts, firewall session logs) matching the host's IP/MAC during the compromise window
  • •Peer-host EDR telemetry showing remote sessions into or out of the wiped host