Analysis Overview
SHA256
88b021b7ca90fd43794747c2a417e74a70c494276d4ebc3cee4c5c9b0d1f68ad
Threat Level: Known bad
The file c4633cedf3f1b0c1527012a4f67d9a01.bin was found to be: Known bad.
Malicious Activity Summary
Darkcomet
Modifies WinLogon for persistence
Darkcomet family
Loads dropped DLL
Deletes itself
Executes dropped EXE
Checks computer location settings
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Enumerates physical storage devices
Unsigned PE
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-13 01:47
Signatures
Darkcomet family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-13 01:47
Reported
2024-04-13 01:50
Platform
win7-20240221-en
Max time kernel
145s
Max time network
153s
Command Line
Signatures
Darkcomet
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\notepad.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 0.tcp.eu.ngrok.io | N/A | N/A |
| N/A | 0.tcp.eu.ngrok.io | N/A | N/A |
| N/A | 0.tcp.eu.ngrok.io | N/A | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe
"C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe"
C:\Windows\SysWOW64\notepad.exe
notepad
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 0.tcp.eu.ngrok.io | udp |
| DE | 3.124.142.205:1604 | 0.tcp.eu.ngrok.io | tcp |
| DE | 3.124.142.205:1604 | 0.tcp.eu.ngrok.io | tcp |
| DE | 3.124.142.205:1604 | 0.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 0.tcp.eu.ngrok.io | udp |
| DE | 3.125.209.94:1604 | 0.tcp.eu.ngrok.io | tcp |
| DE | 3.125.209.94:1604 | 0.tcp.eu.ngrok.io | tcp |
| DE | 3.125.209.94:1604 | 0.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 0.tcp.eu.ngrok.io | udp |
| DE | 3.125.102.39:1604 | 0.tcp.eu.ngrok.io | tcp |
Files
memory/1964-0-0x0000000000240000-0x0000000000241000-memory.dmp
memory/2508-3-0x00000000000C0000-0x00000000000C1000-memory.dmp
memory/2508-29-0x00000000003E0000-0x00000000003E1000-memory.dmp
\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | c4633cedf3f1b0c1527012a4f67d9a01 |
| SHA1 | 221067b2868decbddcaf4e1758dfd9c1e7fced94 |
| SHA256 | 97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8 |
| SHA512 | 87c107bf0c04b2ffc94fe1f2dd9df5b3e19fee67e15620dab90fa8abac90002f62178ca5fd2d3994b76a156c9b7ae690cf76cc7397c915e75aa445aa60b7c2a4 |
memory/2656-38-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/1964-40-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2656-42-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2656-44-0x0000000000400000-0x00000000004B3000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-13 01:47
Reported
2024-04-13 01:50
Platform
win10v2004-20240412-en
Max time kernel
148s
Max time network
135s
Command Line
Signatures
Darkcomet
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-776854024-226333264-2052258302-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\notepad.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-776854024-226333264-2052258302-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-776854024-226333264-2052258302-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 0.tcp.eu.ngrok.io | N/A | N/A |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ | C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe
"C:\Users\Admin\AppData\Local\Temp\97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8.exe"
C:\Windows\SysWOW64\notepad.exe
notepad
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.tcp.eu.ngrok.io | udp |
| DE | 3.124.142.205:1604 | 0.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.141.79.40.in-addr.arpa | udp |
Files
memory/1572-0-0x0000000002410000-0x0000000002411000-memory.dmp
memory/924-3-0x0000000000690000-0x0000000000691000-memory.dmp
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | c4633cedf3f1b0c1527012a4f67d9a01 |
| SHA1 | 221067b2868decbddcaf4e1758dfd9c1e7fced94 |
| SHA256 | 97e952e79c07ce103290267a4209cadcb96b010ea18d4d7932d4649eb242afc8 |
| SHA512 | 87c107bf0c04b2ffc94fe1f2dd9df5b3e19fee67e15620dab90fa8abac90002f62178ca5fd2d3994b76a156c9b7ae690cf76cc7397c915e75aa445aa60b7c2a4 |
memory/3248-62-0x00000000021D0000-0x00000000021D1000-memory.dmp
memory/1572-63-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/3248-65-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/3248-67-0x0000000000400000-0x00000000004B3000-memory.dmp