Analysis Overview
SHA256
27e663cc439cf3ff7b2f66260a851c8cf0ea5292d259bd1c22171685017dbd4c
Threat Level: Known bad
The file a31d59e190008f0a3a2abc334c6ce9f9 was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
Darkcomet
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Writes to the Master Boot Record (MBR)
Suspicious use of SetThreadContext
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-25 06:31
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-25 06:31
Reported
2024-02-25 06:33
Platform
win7-20240221-en
Max time kernel
150s
Max time network
152s
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\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| 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\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1650401615-1019878084-3673944445-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1848 set thread context of 2368 | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe |
| PID 2368 set thread context of 2964 | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe |
| PID 2560 set thread context of 2444 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe |
| PID 2444 set thread context of 2832 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe
"C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe"
C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe
"C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe"
C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe
"C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe"
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
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 | pozza.no-ip.biz | udp |
Files
memory/2368-2-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2368-4-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2368-6-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2368-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2368-12-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2368-14-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2964-17-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-19-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-21-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-23-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-25-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-27-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-29-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-31-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-35-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-36-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2368-37-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2964-39-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-40-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-41-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2964-42-0x0000000000280000-0x0000000000281000-memory.dmp
\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | a31d59e190008f0a3a2abc334c6ce9f9 |
| SHA1 | 37456e8559512dff814b09f9ca3710517148f8f2 |
| SHA256 | 27e663cc439cf3ff7b2f66260a851c8cf0ea5292d259bd1c22171685017dbd4c |
| SHA512 | 47bdeb93ec8e8b659d3279c43524b4410bb91fc8b96e6f3a8044f189d91269b9e0d3fa236063f2fc05c12cf73777079f6e84f4b935e8122c095e85e525b49d75 |
memory/2964-53-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2444-99-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/2832-98-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/2832-100-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/2832-106-0x0000000000400000-0x00000000004AF000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-25 06:31
Reported
2024-02-25 06:33
Platform
win10v2004-20240221-en
Max time kernel
149s
Max time network
148s
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\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| 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-1-5-21-1712835645-2080934712-2142796781-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 380 set thread context of 4400 | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe |
| PID 4400 set thread context of 400 | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe |
| PID 4952 set thread context of 4836 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe |
| PID 4836 set thread context of 1976 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe
"C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe"
C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe
"C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe"
C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe
"C:\Users\Admin\AppData\Local\Temp\a31d59e190008f0a3a2abc334c6ce9f9.exe"
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
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 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| GB | 92.123.128.167:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 167.128.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
| US | 8.8.8.8:53 | pozza.no-ip.biz | udp |
Files
memory/4400-2-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/4400-4-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/400-7-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/400-8-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/400-9-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/4400-10-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/400-12-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/400-13-0x00000000022A0000-0x00000000022A1000-memory.dmp
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | a31d59e190008f0a3a2abc334c6ce9f9 |
| SHA1 | 37456e8559512dff814b09f9ca3710517148f8f2 |
| SHA256 | 27e663cc439cf3ff7b2f66260a851c8cf0ea5292d259bd1c22171685017dbd4c |
| SHA512 | 47bdeb93ec8e8b659d3279c43524b4410bb91fc8b96e6f3a8044f189d91269b9e0d3fa236063f2fc05c12cf73777079f6e84f4b935e8122c095e85e525b49d75 |
memory/400-25-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/4836-33-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/1976-39-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/4836-40-0x0000000000400000-0x00000000004AD000-memory.dmp
memory/1976-41-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-44-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-43-0x00000000026F0000-0x00000000026F1000-memory.dmp
memory/1976-45-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-46-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-47-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-48-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-49-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-50-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-51-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-52-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-53-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-54-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-55-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-56-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-57-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-58-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-59-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-60-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/1976-61-0x0000000000400000-0x00000000004AF000-memory.dmp