Analysis Overview
SHA256
4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5
Threat Level: Known bad
The file 4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe was found to be: Known bad.
Malicious Activity Summary
Darkcomet family
Modifies WinLogon for persistence
Darkcomet
Executes dropped EXE
Loads dropped DLL
Checks computer location settings
Adds Run key to start application
UPX packed file
Unsigned PE
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-09-28 08:36
Signatures
Darkcomet family
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-09-28 08:36
Reported
2024-09-28 08:38
Platform
win7-20240903-en
Max time kernel
140s
Max time network
142s
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\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2232 wrote to memory of 2172 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
| PID 2232 wrote to memory of 2172 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
| PID 2232 wrote to memory of 2172 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
| PID 2232 wrote to memory of 2172 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe
"C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe"
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | sexystar.myq-see.com | udp |
| US | 8.8.8.8:53 | sexystar.myq-see.com | udp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
Files
memory/2232-0-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/2232-1-0x0000000000260000-0x0000000000261000-memory.dmp
\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
| MD5 | b7b88850bc66c349bc02f81a3b443f39 |
| SHA1 | 4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0 |
| SHA256 | 4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5 |
| SHA512 | 47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282 |
memory/2232-11-0x00000000036B0000-0x0000000003767000-memory.dmp
memory/2172-13-0x00000000002E0000-0x00000000002E1000-memory.dmp
memory/2232-15-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/2172-16-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/2172-18-0x00000000002E0000-0x00000000002E1000-memory.dmp
memory/2172-20-0x0000000000400000-0x00000000004B7000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-09-28 08:36
Reported
2024-09-28 08:38
Platform
win10v2004-20240802-en
Max time kernel
149s
Max time network
145s
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\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1104 wrote to memory of 4560 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
| PID 1104 wrote to memory of 4560 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
| PID 1104 wrote to memory of 4560 | N/A | C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe | C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe
"C:\Users\Admin\AppData\Local\Temp\4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5.exe"
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | sexystar.myq-see.com | udp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 136.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 75.117.19.2.in-addr.arpa | udp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 52.111.227.11:443 | tcp | |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | sexystar.myq-see.com | tcp |
| US | 208.91.197.132:5552 | tcp |
Files
memory/1104-0-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/1104-1-0x0000000000C40000-0x0000000000C41000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
| MD5 | b7b88850bc66c349bc02f81a3b443f39 |
| SHA1 | 4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0 |
| SHA256 | 4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5 |
| SHA512 | 47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282 |
memory/4560-14-0x00000000006E0000-0x00000000006E1000-memory.dmp
memory/1104-15-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/4560-16-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/4560-18-0x00000000006E0000-0x00000000006E1000-memory.dmp
memory/4560-20-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/4560-22-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/4560-28-0x0000000000400000-0x00000000004B7000-memory.dmp
memory/4560-30-0x0000000000400000-0x00000000004B7000-memory.dmp