Suspicious Scheduled Task Name As GUID

 1title: Suspicious Scheduled Task Name As GUID
 2id: ff2fff64-4cd6-4a2b-ba7d-e28a30bbe66b
 3status: test
 4description: Detects creation of a scheduled task with a GUID like name
 5references:
 6    - https://thedfirreport.com/2022/10/31/follina-exploit-leads-to-domain-compromise/
 7    - https://thedfirreport.com/2022/02/21/qbot-and-zerologon-lead-to-full-domain-compromise/
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2022/10/31
10tags:
11    - attack.execution
12    - attack.t1053.005
13logsource:
14    product: windows
15    category: process_creation
16detection:
17    selection_img:
18        Image|endswith: '\schtasks.exe'
19        CommandLine|contains: '/Create '
20    selection_tn:
21        CommandLine|contains:
22            # Can start with single or double quote
23            - '/TN "{'
24            - "/TN '{"
25            - "/TN {"
26    selection_end:
27        CommandLine|contains:
28            # Ending of the name to avoid possible FP in the rest of the commandline
29            - '}"'
30            - "}'"
31            - '} '
32    condition: all of selection_*
33falsepositives:
34    - Legitimate software naming their tasks as GUIDs
35level: medium

References

• Follina Exploit Leads to Domain Compromise

  

  In early June 2022, we observed an intrusion where a threat actor gained initial access by exploiting the CVE-2022-30190 (Follina) vulnerability which triggered a Qbot infection chain.

  
  Read More

• Qbot and Zerologon Lead To Full Domain Compromise

  

  In this intrusion (from November 2021), a threat actor gained its initial foothold in the environment through the use of QBot (a.k.a. Quakbot/Qakbot) malware.

  
  Read More

Related rules

• Schtasks From Suspicious Folders
• Suspicious Add Scheduled Task Parent
• Suspicious Modification Of Scheduled Tasks
• Suspicious Scheduled Task Creation
• Suspicious Scheduled Task Update