Sigma rule: Malware Shellcode in Verclsid Target Process

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0d99555175dc, updated 2021-11-27T00:00:00.000Z.

Rule

Title
Malware Shellcode in Verclsid Target Process
Status
test
Level
high
Author
John Lambert (tech), Florian Roth (Nextron Systems)
Date
2017-03-04
Modified
2021-11-27
File
rules-emerging-threats/2017/Malware/Hancitor/proc_access_win_malware_verclsid_shellcode.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a process access to verclsid.exe that injects shellcode from a Microsoft Office application / VBA macro

Log source

product
windows
category
process_access
definition
Requirements: The following config is required to generate the necessary Event ID 10 Process Access events: <ProcessAccess onmatch="include"><CallTrace condition="contains">VBE7.DLL</CallTrace></ProcessAccess><ProcessAccess onmatch="exclude"><CallTrace condition="excludes">UNKNOWN</CallTrace></ProcessAccess>

Detection

selection_target:
    TargetImage|endswith: '\verclsid.exe'
    GrantedAccess: '0x1FFFFF'
selection_calltrace_1:
    CallTrace|contains|all:
        - '|UNKNOWN('
        - 'VBE7.DLL'
selection_calltrace_2:
    SourceImage|contains: '\Microsoft Office\'
    CallTrace|contains: '|UNKNOWN'
condition: selection_target and 1 of selection_calltrace_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.stealth
  • attack.t1055
  • detection.emerging-threats

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-emerging-threats/2017/Malware/Hancitor/proc_access_win_malware_verclsid_shellcode.yml

Sources and licences

  • SigmaHQ

    "Malware Shellcode in Verclsid Target Process" by John Lambert (tech), Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2017/Malware/Hancitor/proc_access_win_malware_verclsid_shellcode.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: Malware Shellcode in Verclsid Target Process",
entity page, dataset version ref-0d99555175dc, updated 2021-11-27T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/b7967e22-3d7e-409b-9ed5-cdae3f9243a1 (accessed 2026-11-03).
Underlying source: SigmaHQ rule b7967e22-3d7e-409b-9ed5-cdae3f9243a1, 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.