Malware Analysis Report

2024-10-19 10:21

Sample ID 220121-2ze1lscaf6
Target e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f
SHA256 e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f
Tags
crimsonrat rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f

Threat Level: Known bad

The file e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f was found to be: Known bad.

Malicious Activity Summary

crimsonrat rat

CrimsonRAT Main Payload

CrimsonRat

Executes dropped EXE

Drops file in Program Files directory

Drops file in Windows directory

Enumerates physical storage devices

Office loads VBA resources, possible macro or embedded object present

Enumerates system info in registry

Modifies registry class

Checks processor information in registry

Suspicious use of SetWindowsHookEx

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-01-21 23:00

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-21 23:00

Reported

2022-01-21 23:14

Platform

win7-en-20211208

Max time kernel

127s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe"

Signatures

CrimsonRAT Main Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

CrimsonRat

rat crimsonrat

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Hanthavra\rnthiavesa.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\PROGRA~3\HANTHA~1\rnthiavesa.exe C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe N/A
File created C:\PROGRA~3\HANTHA~1\rnthiavesa.exe C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\WIA\wiatrace.log C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Enumerates physical storage devices

Office loads VBA resources, possible macro or embedded object present

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\COMMAND C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (int) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\"" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (int) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\ = "&Edit" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\COMMAND C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\"" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Toolbar C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\ = "&Edit" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ddeexec\topic\ = "system" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\topic\ = "system" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\DefaultIcon C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\application C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b005000750062005000720069006d006100720079003e00520024006e0075006a0053005700460065003f007d0061004c00720052007000390078004000570020002500310000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\ = "&Edit" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\ = "&Print" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ddeexec\topic C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\application\ = "Excel" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shellex\IconHandler C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\ = "&Print" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\InprocServer32\ThreadingModel = "Apartment" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit\ = "&Open" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Word\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit\ = "&Open" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Version C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Word\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit\ = "&Edit" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application\ = "Excel" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\InprocServer32\ = "C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohevi.dll" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\"" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\WinWord.exe\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Publisher\shell\edit C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" /p %1" C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Version\14 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.htm C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\WinWord.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000 C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 812 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
PID 812 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
PID 812 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
PID 812 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
PID 812 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\ProgramData\Hanthavra\rnthiavesa.exe
PID 812 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\ProgramData\Hanthavra\rnthiavesa.exe
PID 812 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe C:\ProgramData\Hanthavra\rnthiavesa.exe
PID 1300 wrote to memory of 1132 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 1300 wrote to memory of 1132 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 1300 wrote to memory of 1132 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 1300 wrote to memory of 1132 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe

"C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe"

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE

"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\Documents\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f-03-.docx"

C:\ProgramData\Hanthavra\rnthiavesa.exe

"C:\ProgramData\Hanthavra\rnthiavesa.exe"

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

Network

Country Destination Domain Proto
CA 209.127.16.126:4768 tcp

Files

memory/812-54-0x0000000000BE0000-0x0000000000BE2000-memory.dmp

memory/812-55-0x000007FEF2B40000-0x000007FEF3BD6000-memory.dmp

memory/812-56-0x0000000000BE6000-0x0000000000C05000-memory.dmp

memory/1300-57-0x0000000072F21000-0x0000000072F24000-memory.dmp

memory/1300-58-0x00000000709A1000-0x00000000709A3000-memory.dmp

memory/1300-59-0x000000005FFF0000-0x0000000060000000-memory.dmp

memory/1300-60-0x0000000076C91000-0x0000000076C93000-memory.dmp

C:\Users\Admin\Documents\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f-03-.docx

MD5 498aba93d84770619caa1029cde79bf7
SHA1 63c5f8f5ac49040d8a2d19e41a0c499076881112
SHA256 994dddf45424b2ec72cf186de56f9190a643718bc5c3006465b1bd958a6eb5e8
SHA512 1de8c8e20cc4a88da9441339454a9370d4453853dc3969a02ec8f2477596419ebe2e06ba6b39dacb05eeb85b0ed19e4e93473af31b4bd97adf2bbd53f4c823e7

C:\ProgramData\Hanthavra\rnthiavesa.exe

MD5 d5783c974f54f8eb9ba0eb4396b04187
SHA1 f246f1db61947165aa25a7d7f04e1b231a867b99
SHA256 e38ff03d54d40f4e10292d7cbd614f26f3af13d01ded95dc7c363b317a5d6dd4
SHA512 9baf895b24696d6b760925a34d1eb5ae6b6599601d3ed77d8cbae425bb57a1692c233ef6f67acf83332532ea39a6752e39375b7a0bfb4ab19e8a06e06fc86ce9

C:\ProgramData\Hanthavra\rnthiavesa.exe

MD5 d5783c974f54f8eb9ba0eb4396b04187
SHA1 f246f1db61947165aa25a7d7f04e1b231a867b99
SHA256 e38ff03d54d40f4e10292d7cbd614f26f3af13d01ded95dc7c363b317a5d6dd4
SHA512 9baf895b24696d6b760925a34d1eb5ae6b6599601d3ed77d8cbae425bb57a1692c233ef6f67acf83332532ea39a6752e39375b7a0bfb4ab19e8a06e06fc86ce9

memory/1572-64-0x000007FEF2B40000-0x000007FEF3BD6000-memory.dmp

memory/1572-65-0x0000000000B40000-0x0000000000B42000-memory.dmp

memory/1572-66-0x0000000000B46000-0x0000000000B65000-memory.dmp

memory/1132-67-0x000007FEFC521000-0x000007FEFC523000-memory.dmp

memory/1300-68-0x000000005FFF0000-0x0000000060000000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-01-21 23:00

Reported

2022-01-21 23:15

Platform

win10-en-20211208

Max time kernel

140s

Max time network

162s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe"

Signatures

CrimsonRAT Main Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

CrimsonRat

rat crimsonrat

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Hanthavra\rnthiavesa.exe N/A

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe

"C:\Users\Admin\AppData\Local\Temp\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f.exe"

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE

"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f-03-.docx" /o ""

C:\ProgramData\Hanthavra\rnthiavesa.exe

"C:\ProgramData\Hanthavra\rnthiavesa.exe"

Network

Country Destination Domain Proto
CA 209.127.16.126:4768 tcp

Files

memory/3348-118-0x0000000002740000-0x0000000002742000-memory.dmp

memory/3584-120-0x00007FF893410000-0x00007FF893420000-memory.dmp

memory/3584-121-0x00007FF893410000-0x00007FF893420000-memory.dmp

C:\ProgramData\Hanthavra\rnthiavesa.exe

MD5 93e588df26c62a47d3564e58ec988368
SHA1 fcd11555531f636245d4c03f151dceb62ba72f6e
SHA256 6cecd33e717c607ce578942e35c020d7571a7db67ce9270f9dcff30018a666cc
SHA512 0f1f527eed767036dd6323fb5bfbf3e83fc7c2ef842c6d297742d536f8b1ae5b0b54a8ef83fe26f42916656feb0752badb6a39e63067a7dc6fe3e0797738a8ef

C:\ProgramData\Hanthavra\rnthiavesa.exe

MD5 93e588df26c62a47d3564e58ec988368
SHA1 fcd11555531f636245d4c03f151dceb62ba72f6e
SHA256 6cecd33e717c607ce578942e35c020d7571a7db67ce9270f9dcff30018a666cc
SHA512 0f1f527eed767036dd6323fb5bfbf3e83fc7c2ef842c6d297742d536f8b1ae5b0b54a8ef83fe26f42916656feb0752badb6a39e63067a7dc6fe3e0797738a8ef

memory/2556-132-0x00000232C3410000-0x00000232C3DBA000-memory.dmp

memory/2556-146-0x00000232DE3D0000-0x00000232DE3D2000-memory.dmp

C:\Users\Admin\Documents\e7dbf1eacfbd73576b0e410099898e4c7e2d51d76fe3095314dee1b54860bf4f-03-.docx

MD5 498aba93d84770619caa1029cde79bf7
SHA1 63c5f8f5ac49040d8a2d19e41a0c499076881112
SHA256 994dddf45424b2ec72cf186de56f9190a643718bc5c3006465b1bd958a6eb5e8
SHA512 1de8c8e20cc4a88da9441339454a9370d4453853dc3969a02ec8f2477596419ebe2e06ba6b39dacb05eeb85b0ed19e4e93473af31b4bd97adf2bbd53f4c823e7