Monitoring For Persistence Via BITS
BITS will allow you to schedule a command to execute after a successful download to notify you that the job is finished. When the job runs on the system the command specified in the BITS job will be executed. This can be abused by actors to create a backdoor within the system and for persistence. It will be chained in a BITS job to schedule the download of malware/additional binaries and execute the program after being downloaded.
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
detection:
selection_img:
- Image|endswith: '\bitsadmin.exe'
- OriginalFileName: 'bitsadmin.exe'
selection_cli_notify_1:
CommandLine|contains: '/SetNotifyCmdLine'
selection_cli_notify_2:
CommandLine|contains:
- '%COMSPEC%'
- 'cmd.exe'
- 'regsvr32.exe'
selection_cli_add_1:
CommandLine|contains: '/Addfile'
selection_cli_add_2:
CommandLine|contains:
- 'http:'
- 'https:'
- 'ftp:'
- 'ftps:'
condition: selection_img and (all of selection_cli_notify_* or all of selection_cli_add_*)False positive likelihood has not been assessed. Additional context may be needed during triage.
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