Detection rules › Sigma

HackTool - XORDump Execution

Status
test
Severity
high
Log source
category process_creation, product windows
Author
Florian Roth (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects suspicious use of XORDump process memory dumping utility

Known false positives

  • Another tool that uses the command line switches of XORdump

MITRE ATT&CK coverage

Telemetry coverage

Rule body

title: HackTool - XORDump Execution
id: 66e563f9-1cbd-4a22-a957-d8b7c0f44372
status: test
description: Detects suspicious use of XORDump process memory dumping utility
references:
    - https://github.com/audibleblink/xordump
author: Florian Roth (Nextron Systems)
date: 2022-01-28
modified: 2023-02-08
tags:
    - attack.stealth
    - attack.t1036
    - attack.t1003.001
    - attack.credential-access
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\xordump.exe'
        - CommandLine|contains:
              - ' -process lsass.exe '
              - ' -m comsvcs '
              - ' -m dbghelp '
              - ' -m dbgcore '
    condition: selection
falsepositives:
    - Another tool that uses the command line switches of XORdump
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    - Image|endswith: '\xordump.exe'
    - CommandLine|contains:
          - ' -process lsass.exe '
          - ' -m comsvcs '
          - ' -m dbghelp '
          - ' -m dbgcore '

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • -m comsvcs
  • -m dbgcore
  • -m dbghelp
  • -process lsass.exe
field:"CommandLine" kind:match
Imageends_with
  • \xordump.exe
field:"Image" kind:ends_with value:"\xordump.exe"