Sigma rule: Renamed ZOHO Dctask64 Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-f20a2a5948fd, updated 2025-01-22T00:00:00.000Z.

Rule

Title
Renamed ZOHO Dctask64 Execution
Status
test
Level
high
Author
Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
Date
2020-01-28
Modified
2025-01-22
File
rules/windows/process_creation/proc_creation_win_renamed_dctask64.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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.

Log source

product
windows
category
process_creation

Detection

selection:
    Hashes|contains:
        - 'IMPHASH=6834B1B94E49701D77CCB3C0895E1AFD'
        - 'IMPHASH=1BB6F93B129F398C7C4A76BB97450BBA'
        - 'IMPHASH=FAA2AC19875FADE461C8D89DCF2710A3'
        - 'IMPHASH=F1039CED4B91572AB7847D26032E6BBF'
filter_main_legit_name:
    Image|endswith: '\dctask64.exe'
condition: selection and not 1 of filter_main_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.stealth
  • attack.t1036
  • attack.t1055.001
  • attack.t1202
  • attack.t1218

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_renamed_dctask64.yml

Sources and licences

  • SigmaHQ

    "Renamed ZOHO Dctask64 Execution" by Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_renamed_dctask64.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Renamed ZOHO Dctask64 Execution",
entity page, dataset version ref-f20a2a5948fd, updated 2025-01-22T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/340a090b-c4e9-412e-bb36-b4b16fe96f9b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 340a090b-c4e9-412e-bb36-b4b16fe96f9b, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.