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73 lines
2.2 KiB
YAML
73 lines
2.2 KiB
YAML
title: Exchange Exploitation Activity
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id: bbb2dedd-a0e3-46ab-ba6c-6c82ae7a9aa7
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description: Detects activity observed by different researchers to be HAFNIUM group acitivity (or related) on Exchange servers
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author: Florian Roth
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date: 2021/03/09
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modified: 2021/03/16
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status: experimental
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references:
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- https://blog.truesec.com/2021/03/07/exchange-zero-day-proxylogon-and-hafnium/
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- https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/
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- https://discuss.elastic.co/t/detection-and-response-for-hafnium-activity/266289/3
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- https://twitter.com/GadixCRK/status/1369313704869834753?s=20
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- https://twitter.com/BleepinComputer/status/1372218235949617161
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logsource:
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category: process_creation
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product: windows
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detection:
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selection1:
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CommandLine|contains|all:
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- 'attrib'
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- ' +h '
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- ' +s '
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- ' +r '
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- '.aspx'
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selection2:
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CommandLine|contains|all:
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- 'schtasks'
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- 'VSPerfMon'
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selection3:
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CommandLine|contains|all:
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- 'vssadmin list shadows'
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- 'Temp\__output'
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selection4:
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CommandLine|contains: '%TEMP%\execute.bat'
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selection5:
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Image|endswith: 'Users\Public\opera\Opera_browser.exe'
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selection6:
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Image|endswith: 'Opera_browser.exe'
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ParentImage|endswith:
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- '\services.exe'
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- '\svchost.exe'
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selection7:
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Image|contains: '\ProgramData\VSPerfMon\'
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selection8:
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CommandLine|contains|all:
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- ' -t7z '
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- 'C:\Programdata\pst'
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- '\it.zip'
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selection9:
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Image|endswith: '\makecab.exe'
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CommandLine|contains:
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- 'Microsoft\Exchange Server\'
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- 'inetpub\wwwroot'
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selection10:
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CommandLine|contains:
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- '\Temp\xx.bat'
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- 'Windows\WwanSvcdcs'
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- 'Windows\Temp\cw.exe'
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selection11:
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CommandLine|contains|all:
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- '\comsvcs.dll'
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- 'Minidump'
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- '\inetpub\wwwroot'
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selection12:
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CommandLine|contains|all:
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- 'dsquery'
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- ' -uco '
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- '\inetpub\wwwroot'
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condition: 1 of them
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falsepositives:
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- Unknown
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level: high
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