Uncommon One Time Only Scheduled Task At 00:00

calendar Dec 1, 2023 · attack.execution attack.persistence attack.privilege_escalation attack.t1053.005  ·
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Detects scheduled task creation events that include suspicious actions, and is run once at 00:00

Sigma rule (View on GitHub)

 1title: Uncommon One Time Only Scheduled Task At 00:00
 2id: 970823b7-273b-460a-8afc-3a6811998529
 3status: test
 4description: Detects scheduled task creation events that include suspicious actions, and is run once at 00:00
 5references:
 6    - https://www.trendmicro.com/vinfo/us/security/news/ransomware-spotlight/ransomware-spotlight-blackbyte
 7author: pH-T (Nextron Systems)
 8date: 2022/07/15
 9modified: 2023/02/03
10tags:
11    - attack.execution
12    - attack.persistence
13    - attack.privilege_escalation
14    - attack.t1053.005
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection_img:
20        - Image|contains: '\schtasks.exe'
21        - OriginalFileName: 'schtasks.exe'
22    selection_cli:
23        CommandLine|contains:
24            - 'wscript'
25            - 'vbscript'
26            - 'cscript'
27            - 'wmic '
28            - 'wmic.exe'
29            - 'regsvr32.exe'
30            - 'powershell'
31            - '\AppData\'
32    selection_time:
33        CommandLine|contains|all:
34            - 'once'
35            - '00:00'
36    condition: all of selection_*
37falsepositives:
38    - Software installation
39level: high

References

  • Ransomware Spotlight: BlackByte - Security News

    BlackByte is a ransomware group that has been building a name for itself since 2021. Like its contemporaries, it has gone after critical infrastructure for a higher chance of getting a payout. What techniques sets it apart?


    Read More

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