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Proc creation lnx process discovery #5117

Merged
merged 6 commits into from
Dec 14, 2024
Merged

Proc creation lnx process discovery #5117

merged 6 commits into from
Dec 14, 2024

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CheraghiMilad
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Summary of the Pull Request

Changelog

Example Log Event

pgrep log

<Events>
  <Event>
    <System>
      <Provider Name="Linux-Sysmon" Guid="{ff032593-a8d3-4f13-b0d6-01fc615a0f97}"/>
      <EventID>1</EventID>
      <Version>5</Version>
      <Level>4</Level>
      <Task>1</Task>
      <Opcode>0</Opcode>
      <Keywords>0x8000000000000000</Keywords>
      <TimeCreated SystemTime="2024-12-10T08:24:38.911075000Z"/>
      <EventRecordID>383812</EventRecordID>
      <Correlation/>
      <Execution ProcessID="1252" ThreadID="1252"/>
      <Channel>Linux-Sysmon/Operational</Channel>
      <Computer>caldera-virtual-machine</Computer>
      <Security UserId="0"/>
    </System>
    <EventData>
      <Data Name="RuleName">-</Data>
      <Data Name="UtcTime">2024-12-08 18:58:36.665</Data>
      <Data Name="ProcessGuid">{36fe7a82-ec5c-6755-c12c-d51439560000}</Data>
      <Data Name="ProcessId">9116</Data>
      <Data Name="Image">/usr/bin/pgrep</Data>
      <Data Name="FileVersion">-</Data>
      <Data Name="Description">-</Data>
      <Data Name="Product">-</Data>
      <Data Name="Company">-</Data>
      <Data Name="OriginalFileName">-</Data>
      <Data Name="CommandLine">pgrep terminal</Data>
      <Data Name="CurrentDirectory">/home/caldera</Data>
      <Data Name="User">caldera</Data>
      <Data Name="LogonGuid">{36fe7a82-0000-0000-e803-000001000000}</Data>
      <Data Name="LogonId">1000</Data>
      <Data Name="TerminalSessionId">3</Data>
      <Data Name="IntegrityLevel">no level</Data>
      <Data Name="Hashes">SHA256=5b8ca0397fa4150b1637b3c7998b5976731d0064c1fd5ce3ab8d9ce879410c31</Data>
      <Data Name="ParentProcessGuid">{36fe7a82-ec55-6755-d566-10a0cb550000}</Data>
      <Data Name="ParentProcessId">8908</Data>
      <Data Name="ParentImage">/usr/bin/bash</Data>
      <Data Name="ParentCommandLine">bash</Data>
      <Data Name="ParentUser">caldera</Data>
    </EventData>
  </Event>

pstree log

  <Event>
    <System>
      <Provider Name="Linux-Sysmon" Guid="{ff032593-a8d3-4f13-b0d6-01fc615a0f97}"/>
      <EventID>1</EventID>
      <Version>5</Version>
      <Level>4</Level>
      <Task>1</Task>
      <Opcode>0</Opcode>
      <Keywords>0x8000000000000000</Keywords>
      <TimeCreated SystemTime="2024-12-10T08:00:16.795111000Z"/>
      <EventRecordID>383002</EventRecordID>
      <Correlation/>
      <Execution ProcessID="1252" ThreadID="1252"/>
      <Channel>Linux-Sysmon/Operational</Channel>
      <Computer>caldera-virtual-machine</Computer>
      <Security UserId="0"/>
    </System>
    <EventData>
      <Data Name="RuleName">-</Data>
      <Data Name="UtcTime">2024-12-08 18:34:14.542</Data>
      <Data Name="ProcessGuid">{36fe7a82-e6a6-6755-75f5-e440d3550000}</Data>
      <Data Name="ProcessId">7884</Data>
      <Data Name="Image">/usr/bin/pstree</Data>
      <Data Name="FileVersion">-</Data>
      <Data Name="Description">-</Data>
      <Data Name="Product">-</Data>
      <Data Name="Company">-</Data>
      <Data Name="OriginalFileName">-</Data>
      <Data Name="CommandLine">pstree</Data>
      <Data Name="CurrentDirectory">/home/caldera</Data>
      <Data Name="User">caldera</Data>
      <Data Name="LogonGuid">{36fe7a82-0000-0000-e803-000000000000}</Data>
      <Data Name="LogonId">1000</Data>
      <Data Name="TerminalSessionId">3</Data>
      <Data Name="IntegrityLevel">no level</Data>
      <Data Name="Hashes">SHA256=8e43af67366ab733b795b8e4b8bff265ef0b32c8e9f07cb333796e0baad44fe6</Data>
      <Data Name="ParentProcessGuid">{36fe7a82-6868-6755-d5d6-c908e8550000}</Data>
      <Data Name="ParentProcessId">2352</Data>
      <Data Name="ParentImage">/usr/bin/bash</Data>
      <Data Name="ParentCommandLine">bash</Data>
      <Data Name="ParentUser">caldera</Data>
    </EventData>
  </Event>

atop log

  <Event>
    <System>
      <Provider Name="Linux-Sysmon" Guid="{ff032593-a8d3-4f13-b0d6-01fc615a0f97}"/>
      <EventID>1</EventID>
      <Version>5</Version>
      <Level>4</Level>
      <Task>1</Task>
      <Opcode>0</Opcode>
      <Keywords>0x8000000000000000</Keywords>
      <TimeCreated SystemTime="2024-12-10T08:42:03.873352000Z"/>
      <EventRecordID>384821</EventRecordID>
      <Correlation/>
      <Execution ProcessID="1252" ThreadID="1252"/>
      <Channel>Linux-Sysmon/Operational</Channel>
      <Computer>caldera-virtual-machine</Computer>
      <Security UserId="0"/>
    </System>
    <EventData>
      <Data Name="RuleName">-</Data>
      <Data Name="UtcTime">2024-12-08 19:16:01.626</Data>
      <Data Name="ProcessGuid">{36fe7a82-f071-6755-7dd4-601101560000}</Data>
      <Data Name="ProcessId">10711</Data>
      <Data Name="Image">/usr/bin/atop</Data>
      <Data Name="FileVersion">-</Data>
      <Data Name="Description">-</Data>
      <Data Name="Product">-</Data>
      <Data Name="Company">-</Data>
      <Data Name="OriginalFileName">-</Data>
      <Data Name="CommandLine">atop</Data>
      <Data Name="CurrentDirectory">/home/caldera</Data>
      <Data Name="User">caldera</Data>
      <Data Name="LogonGuid">{36fe7a82-0000-0000-e803-000000000000}</Data>
      <Data Name="LogonId">1000</Data>
      <Data Name="TerminalSessionId">3</Data>
      <Data Name="IntegrityLevel">no level</Data>
      <Data Name="Hashes">SHA256=465ab294b593beef48a4432fa7377c1e425c774a8214a25b34c5c17e3d56bae9</Data>
      <Data Name="ParentProcessGuid">{36fe7a82-6868-6755-d5d6-c908e8550000}</Data>
      <Data Name="ParentProcessId">2352</Data>
      <Data Name="ParentImage">/usr/bin/bash</Data>
      <Data Name="ParentCommandLine">bash</Data>
      <Data Name="ParentUser">caldera</Data>
    </EventData>
  </Event>

htop log

  <Event>
    <System>
      <Provider Name="Linux-Sysmon" Guid="{ff032593-a8d3-4f13-b0d6-01fc615a0f97}"/>
      <EventID>1</EventID>
      <Version>5</Version>
      <Level>4</Level>
      <Task>1</Task>
      <Opcode>0</Opcode>
      <Keywords>0x8000000000000000</Keywords>
      <TimeCreated SystemTime="2024-12-10T08:11:28.822152000Z"/>
      <EventRecordID>383673</EventRecordID>
      <Correlation/>
      <Execution ProcessID="1252" ThreadID="1252"/>
      <Channel>Linux-Sysmon/Operational</Channel>
      <Computer>caldera-virtual-machine</Computer>
      <Security UserId="0"/>
    </System>
    <EventData>
      <Data Name="RuleName">-</Data>
      <Data Name="UtcTime">2024-12-08 18:45:26.573</Data>
      <Data Name="ProcessGuid">{36fe7a82-e946-6755-255e-99ba7c550000}</Data>
      <Data Name="ProcessId">8879</Data>
      <Data Name="Image">/usr/bin/htop</Data>
      <Data Name="FileVersion">-</Data>
      <Data Name="Description">-</Data>
      <Data Name="Product">-</Data>
      <Data Name="Company">-</Data>
      <Data Name="OriginalFileName">-</Data>
      <Data Name="CommandLine">htop</Data>
      <Data Name="CurrentDirectory">/home/caldera</Data>
      <Data Name="User">caldera</Data>
      <Data Name="LogonGuid">{36fe7a82-0000-0000-e803-000000000000}</Data>
      <Data Name="LogonId">1000</Data>
      <Data Name="TerminalSessionId">3</Data>
      <Data Name="IntegrityLevel">no level</Data>
      <Data Name="Hashes">SHA256=1e14eb87ca42767242bb82f432dfc4cba3aa7d920323191cf943c368cc01b5bf</Data>
      <Data Name="ParentProcessGuid">{36fe7a82-6868-6755-d5d6-c908e8550000}</Data>
      <Data Name="ParentProcessId">2352</Data>
      <Data Name="ParentImage">/usr/bin/bash</Data>
      <Data Name="ParentCommandLine">bash</Data>
      <Data Name="ParentUser">caldera</Data>
    </EventData>
  </Event>
</Events>

Fixed Issues

SigmaHQ Rule Creation Conventions

  • If your PR adds new rules, please consider following and applying these conventions

@github-actions github-actions bot added Rules Linux Pull request add/update linux related rules labels Dec 10, 2024
@frack113 frack113 added the Work In Progress Some changes are needed label Dec 14, 2024
nasbench and others added 3 commits December 14, 2024 22:08
@nasbench @frack113
Apply suggestions from code review
b4744cb 
Co-authored-by: frack113 <62423083+frack113@users.noreply.github.com>
@nasbench
Update proc_creation_lnx_process_discovery.yml
63b6604
@nasbench
move to th
c836eba
@nasbench nasbench dismissed frack113’s stale review December 14, 2024 20:15

Suggestion applied

@nasbench nasbench merged commit 44775b8 into SigmaHQ:master Dec 14, 2024
12 checks passed
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Reviewers

@nasbench nasbench nasbench approved these changes

@frack113 frack113 frack113 left review comments

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3 participants
@CheraghiMilad @nasbench @frack113