Renamed ZOHO Dctask64 Execution

calendar Oct 23, 2025 · attack.privilege-escalation attack.defense-evasion attack.t1036 attack.t1055.001 attack.t1202 attack.t1218  ·
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Detects a renamed "dctask64.exe" execution, a signed binary by ZOHO Corporation part of ManageEngine Endpoint Central. This binary can be abused for DLL injection, arbitrary command and process execution.

Sigma rule (View on GitHub)

 1title: Renamed ZOHO Dctask64 Execution
 2id: 340a090b-c4e9-412e-bb36-b4b16fe96f9b
 3status: test
 4description: |
 5    Detects a renamed "dctask64.exe" execution, a signed binary by ZOHO Corporation part of ManageEngine Endpoint Central.
 6    This binary can be abused for DLL injection, arbitrary command and process execution.    
 7references:
 8    - https://twitter.com/gN3mes1s/status/1222088214581825540
 9    - https://twitter.com/gN3mes1s/status/1222095963789111296
10    - https://twitter.com/gN3mes1s/status/1222095371175911424
11author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
12date: 2020-01-28
13modified: 2025-01-22
14tags:
15    - attack.privilege-escalation
16    - attack.defense-evasion
17    - attack.t1036
18    - attack.t1055.001
19    - attack.t1202
20    - attack.t1218
21logsource:
22    category: process_creation
23    product: windows
24detection:
25    selection:
26        Hashes|contains:
27            - 'IMPHASH=6834B1B94E49701D77CCB3C0895E1AFD'
28            - 'IMPHASH=1BB6F93B129F398C7C4A76BB97450BBA'
29            - 'IMPHASH=FAA2AC19875FADE461C8D89DCF2710A3'
30            - 'IMPHASH=F1039CED4B91572AB7847D26032E6BBF'
31    filter_main_legit_name:
32        Image|endswith: '\dctask64.exe'
33    condition: selection and not 1 of filter_main_*
34falsepositives:
35    - Unknown
36level: high

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