T1070.006: Timestomp
Adversaries may modify file time attributes to hide new or changes to existing files. Timestomping is a technique that modifies the timestamps of a file (the modify, access, create, and change times), often to mimic files that are in the same folder. This is done, for example, on files that have been modified or created by the adversary so that they do not appear conspicuous to forensic investigators or file analysis tools.
Timestomping may be used along with file name Masquerading to hide malware and tools.
Positive Technologies products that cover the technique
MaxPatrol SIEM knowledge base
— Linux: Monitoring of processes run with command line input containing the 'touch' command and the '-t' or '-acmr' parameter. — Windows: Monitoring of events related to execution of PowerShell commands with command line input containing the Get-ChildItem cmdlet and fragment '.CreationTime', '.LastWriteTime', or '.LastAccessTime'.
Expert Required. The technique is detected only with the combination of «PT Product + Expert»
Detection
| ID | DS0022 | Data source and component | File: File Modification | Description | Monitor for unexpected modifications to file timestamps |
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| ID | DS0022 | Data source and component | File: File Metadata | Description | Monitor for file modifications that collects information on file handle opens and can compare timestamp values |
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