# T1561 - Disk Wipe

## SOC Recommendation
Investigate Disk Wipe activity in the context of Impact: confirm scope, affected host/identity, and whether it matches expected administrative behaviour before deciding this is benign.

## D3FEND Mappings
| D3FEND Technique | Relationship | Practical SOC Action |
|---|---|---|
| Disk Partitioning | Evict | Use Disk Partitioning to remove the adversary's foothold once this technique is confirmed. |

## Investigation Steps
1. Review Defender for Endpoint / Defender XDR alerts and timeline for the affected host or identity.
2. Check Sentinel analytics rules and incidents correlated with this technique.
3. Review Entra ID sign-in and audit logs if the technique involves an identity or cloud resource.

## Evidence to Collect
- Host or resource affected
- Account or identity involved
- Timestamp of the activity
- Related process, file, or network artifact
- Any preceding or follow-on alerts

## Response Actions
| Action | Risk | Automation Safe | Approval Required |
|---|---|---|---|
| Isolate device IMMEDIATELY | Medium | No | Yes |
| Preserve forensic image before any further disk activity | Low | No | Yes |
| Notify SOC Manager and customer CISO | Low | Yes | No |
| Assess whether data can be recovered from backups | Low | No | Yes |
| If nation-state indicators: NCSC notification | Low | No | Yes |

## KQL
```kql
let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/DEV-0586.csv"] with (format="csv", ignoreFirstRecord=True);
let sha256Hashes = (iocs | where Type =~ "sha256" | project IoC);
let Command_Line = (iocs | where Type =~ "CommandLine" | project IoC);
(union isfuzzy=true
(DeviceProcessEvents
| where InitiatingProcessSHA256 in (sha256Hashes) or SHA256 in (sha256Hashes) or ( InitiatingProcessCommandLine has ('127.0.0.1\\ADMIN$') and InitiatingProcessCommandLine has_any (Command_Line))
| project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName,  InitiatingProcessSHA256, Type, AccountName, SHA256
| extend Account = AccountName, Computer = DeviceName,  CommandLine = InitiatingProcessCommandLine, FileHash = case(InitiatingProcessSHA256 in (sha256Hashes), "InitiatingProcessSHA256", SHA256 in (sha256Hashes), "SHA256", "No Match")
| extend timestamp = TimeGenerated, HostCustomEntity = Computer , AccountCustomEntity = Account, ProcessCustomEntity = InitiatingProcessFileName, FileHashCustomEntity = case(FileHash == "InitiatingProcessSHA256", InitiatingProcessSHA256, FileHash == "SHA256", SHA256, "No Match"), AlgorithmCustomEntity = "SHA256"
),
( SecurityEvent
| where EventID == 4688
| where ( CommandLine has (@'127.0.0.1\\ADMIN$') and CommandLine has_any (Command_Line))
| project TimeGenerated, Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type, EventID
| extend timestamp = TimeGenerated, HostCustomEntity = Computer , AccountCustomEntity = Account, ProcessCustomEntity = NewProcessName
),
( CommonSecurityLog
| where FileHash in (sha256Hashes)
| project TimeGenerated, Message, SourceUserID, FileHash, Type
| extend timestamp = TimeGenerated, FileHashCustomEntity = FileHash, Account = SourceUserID, AlgorithmCustomEntity = "SHA256"
),
( imFileEvent
| where Hash in~ (sha256Hashes) or  ( ActingProcessCommandLine has ('127.0.0.1\\ADMIN$') and ActingProcessCommandLine has_any (Command_Line))
| extend Account = ActorUsername, Computer = DvcHostname, IPAddress = SrcIpAddr, CommandLine = ActingProcessCommandLine, FileHash = TargetFileSHA256
| project Type, TimeGenerated, Computer, Account, IPAddress, CommandLine, FileHash
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, FileHashCustomEntity = FileHash, AlgorithmCustomEntity = "SHA256"
),
(Event
| where Source == "Microsoft-Windows-Sysmon"
| where EventID == 1
| extend EvData = parse_xml(EventData)
| extend EventDetail = EvData.DataItem.EventData.Data
| extend Image = EventDetail.[4].["#text"],  CommandLine = EventDetail.[10].["#text"], Hashes = tostring(EventDetail.[17].["#text"])
| extend Hashes = extract_all(@"(?P<key>\w+)=(?P<value>[a-zA-Z0-9]+)", dynamic(["key","value"]), Hashes)
| extend Hashes = column_ifexists("Hashes", ""), CommandLine = column_ifexists("CommandLine", "")
| extend Hashes = todynamic(Hashes) | mv-expand Hashes
| where (Hashes[0] =~ "SHA256" and Hashes[1] has_any (sha256Hashes)) or ( CommandLine has ('127.0.0.1\\ADMIN$') and CommandLine has_any (Command_Line)) 
| project TimeGenerated, EventDetail, UserName, Computer, Type, Source, Hashes, CommandLine, Image
| extend Type = strcat(Type, ": ", Source)
| extend timestamp = TimeGenerated, HostCustomEntity = Computer , AccountCustomEntity = UserName, ProcessCustomEntity = tostring(split(Image, '\\', -1)[-1]), FileHashCustomEntity = tostring(Hashes[1]), AlgorithmCustomEntity = "SHA256"
)
)
```

## Escalation Criteria
- Disk Wipe activity observed on a privileged account or critical system.
- Activity follows or precedes other suspicious behaviour in the same investigation.
- Automated triage cannot confidently rule out malicious intent.

## False Positive Considerations
- Legitimate administrative or maintenance activity matching this pattern.
- Approved security testing or red team exercise.
- Known benign software producing similar telemetry.

Generated by SOC Response Atlas by Basyrix.