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Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
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17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
Potential Pikabot Hollowing Activity
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Pikabot Hollowing Activity
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: Potential Pikabot Hollowing Activity
id: d8937fe7-42d5-4b4d-8178-e089c908f63f
status: test
description: |
Detects the execution of rundll32 that leads to the invocation of legitimate Windows binaries.
The malware Pikabot has been seen to use this technique for process hollowing through hard-coded Windows binaries
references:
- https://www.virustotal.com/gui/file/b6e8910fb9b3bb1fcddefd35ff0ed8624930d30d6977e11808c8330415685a62
- https://www.virustotal.com/gui/file/6bb4cdbaef03b732a93559a58173e7f16b29bfb159a1065fae9185000ff23b4b
- https://github.com/pr0xylife/Pikabot/blob/7f7723a74ca325ec54c6e61e076acce9a4b20538/Pikabot_06.12.2023.txt
author: Andreas Braathen (mnemonic.io)
date: 2023-10-27
modified: 2024-01-26
tags:
- attack.privilege-escalation
- attack.defense-evasion
- attack.t1055.012
- detection.emerging-threats
logsource:
product: windows
category: process_creation
detection:
selection:
ParentImage|endswith: '\rundll32.exe'
Image|endswith:
# Note: Only add processes seen used by Pikabot to avoid collision with other strains of malware
- '\SearchFilterHost.exe'
- '\SearchProtocolHost.exe'
- '\sndvol.exe'
- '\wermgr.exe'
- '\wwahost.exe'
filter_main_legit_sndvol:
Image|endswith: '\sndvol.exe'
ParentCommandLine|contains: 'mmsys.cpl'
condition: selection and not 1 of filter_main_*
falsepositives:
- Unlikely
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2023/Malware/Pikabot/proc_creation_win_malware_pikabot_rundll32_hollowing.yml