Analysis Overview
SHA256
70635ba75fdb495bb4c0209f26176f0c0d40fd294c8b39898f18742f2e55ce20
Threat Level: Known bad
The file 6b18a6b20832fb7929ccb4b3043f3218 was found to be: Known bad.
Malicious Activity Summary
Darkcomet
Modifies WinLogon for persistence
Loads dropped DLL
Executes dropped EXE
Checks computer location settings
Writes to the Master Boot Record (MBR)
Program crash
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-20 18:09
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-20 18:09
Reported
2024-01-20 18:12
Platform
win10v2004-20231215-en
Max time kernel
147s
Max time network
155s
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\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.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 |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Program Files (x86)\Internet Explorer\iexplore.exe |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | C:\Program Files (x86)\Internet Explorer\iexplore.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4824 set thread context of 4072 | N/A | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe |
| PID 2740 set thread context of 3604 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe |
| PID 3604 set thread context of 3340 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Program Files (x86)\Internet Explorer\iexplore.exe |
| PID 3340 set thread context of 4648 | N/A | C:\Program Files (x86)\Internet Explorer\iexplore.exe | C:\Program Files (x86)\Internet Explorer\iexplore.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\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Internet Explorer\iexplore.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe
"C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe"
C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe
"C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.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:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 4648 -ip 4648
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4648 -s 84
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 192.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 170.117.168.52.in-addr.arpa | udp |
Files
memory/4072-2-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/4072-3-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/4072-4-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/4072-5-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/4072-6-0x0000000000750000-0x0000000000751000-memory.dmp
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | 6b18a6b20832fb7929ccb4b3043f3218 |
| SHA1 | 6f35aca55396af3e9f8e6939c4ee1bfb3f5bc69a |
| SHA256 | 70635ba75fdb495bb4c0209f26176f0c0d40fd294c8b39898f18742f2e55ce20 |
| SHA512 | f69815bc4bead7481be0ecaa43eb53b32c26a5502e40f4b3f68789534cf501246528a35e86bf3b092aed4864691192527414c7c949327c7610e1659377b230f9 |
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | 83ca740e49c563d0601ac4814fbaf290 |
| SHA1 | 52078490097e9507c60531b081231b89fcc10a27 |
| SHA256 | c1634b036cc7b82c68246af1fb32fbca23d364a05763a1d70bfbeb2a1b8c74bf |
| SHA512 | 33817687be440fb581d3bbb411ee56e531e7fd5c13aca582a0814ed896b8ca2bd0e10be7757fe686c7501ced58e7d121dbf9d5588667926e6affcd1cc91a63d9 |
memory/4072-19-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/3604-27-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/3604-28-0x0000000000810000-0x0000000000811000-memory.dmp
memory/3604-26-0x0000000000400000-0x00000000004F2000-memory.dmp
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | 889d5824f56c3e078758ef4e53f31727 |
| SHA1 | e77aacc4bc9edde803f92a70ea50f9fa4975cf35 |
| SHA256 | 30fb698b784ebb140d2d21b137d762638a58d8ceef1942a22923ca7fb1b53de3 |
| SHA512 | d656a683b0051989c958de8ea3c689e080612a78a36da3d7ba7154fcc82977fc1136d5e1b54208336ee9ecfcf36a7e61edbc19b0ffac0d6a667679c5a613e5a1 |
memory/3340-29-0x0000000000400000-0x00000000004F1000-memory.dmp
memory/3604-30-0x0000000000400000-0x00000000004F2000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-20 18:09
Reported
2024-01-20 18:12
Platform
win7-20231215-en
Max time kernel
131s
Max time network
143s
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\6b18a6b20832fb7929ccb4b3043f3218.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 |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.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-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.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\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| File opened for modification | \??\PhysicalDrive0 | C:\Program Files (x86)\Internet Explorer\iexplore.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2612 set thread context of 1940 | N/A | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe | C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe |
| PID 2748 set thread context of 2536 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe |
| PID 2536 set thread context of 2528 | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | C:\Program Files (x86)\Internet Explorer\iexplore.exe |
| PID 2528 set thread context of 2560 | N/A | C:\Program Files (x86)\Internet Explorer\iexplore.exe | C:\Program Files (x86)\Internet Explorer\iexplore.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\6b18a6b20832fb7929ccb4b3043f3218.exe | N/A |
| N/A | N/A | C:\Users\Admin\Documents\MSDCSC\msdcsc.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Internet Explorer\iexplore.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Internet Explorer\iexplore.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe
"C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe"
C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.exe
"C:\Users\Admin\AppData\Local\Temp\6b18a6b20832fb7929ccb4b3043f3218.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:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
Network
| Country | Destination | Domain | Proto |
| CH | 84.72.27.213:1604 | tcp | |
| CH | 84.72.27.213:1604 | tcp | |
| CH | 84.72.27.213:1604 | tcp | |
| CH | 84.72.27.213:1604 | tcp | |
| CH | 84.72.27.213:1604 | tcp | |
| CH | 84.72.27.213:1604 | tcp | |
| CH | 84.72.27.213:1604 | tcp |
Files
memory/1940-2-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-4-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-6-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-8-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-10-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-12-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-14-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-16-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-18-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1940-20-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-21-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-22-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-23-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-24-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/1940-25-0x0000000000240000-0x0000000000241000-memory.dmp
\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | c9a40619dfdc1dada43c412323a32069 |
| SHA1 | 667962426ebd67c057ad286f91e8f91b9c20e3bf |
| SHA256 | da8b4dac71272c87c9340886ca40a70e24fd566d4ac7b3a8b3072d7789af9f35 |
| SHA512 | 01ee538fc6cb872d1e4c0f65e53cb38cae975236003e1dae86641950ddab15e548ae0468527d66b5f8ed8534020cadb1c0fb8e6fdccbc456bd8c72cb025a3bf9 |
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | 6b18a6b20832fb7929ccb4b3043f3218 |
| SHA1 | 6f35aca55396af3e9f8e6939c4ee1bfb3f5bc69a |
| SHA256 | 70635ba75fdb495bb4c0209f26176f0c0d40fd294c8b39898f18742f2e55ce20 |
| SHA512 | f69815bc4bead7481be0ecaa43eb53b32c26a5502e40f4b3f68789534cf501246528a35e86bf3b092aed4864691192527414c7c949327c7610e1659377b230f9 |
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | 7617c14e04407e82bbec55f07f6e3f55 |
| SHA1 | c9704a54b9077790394868c0b04f0e34ae3805ef |
| SHA256 | c259d6579356f15594eaf963c5e620ae15f16ab84a3715d66390f94997f4f68c |
| SHA512 | 5272bf36b1f43c0a03c60e7d23afe2b15ba2a5f927260f25db46b22353d1c2445b4e4bf82fa2ae83b1ee2d17256f9be42f73124a69897e5ea414ee51236ad3cb |
memory/1940-36-0x0000000000400000-0x00000000004F2000-memory.dmp
\Users\Admin\Documents\MSDCSC\msdcsc.exe
| MD5 | fc65b192df46c0032665308e99e38a8e |
| SHA1 | 08ea4b9c54456f97b2502e615dc84f0e9d6c5e98 |
| SHA256 | 71e059fa78fa9f26226e1714295507cf4282dc73899a36a559fe65e5365c32a7 |
| SHA512 | c76a76acdba663b5859a5a4af70e400a1676cd87c57a19d9c80a3817b3927f88c4322bd96ff17783caff7d1cbea49ac9de274beb361b4a1943bf34d764227afc |
memory/2536-63-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/2536-64-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/2536-68-0x0000000000400000-0x00000000004F2000-memory.dmp
memory/2528-67-0x0000000000400000-0x00000000004F1000-memory.dmp
memory/2536-66-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/2536-65-0x0000000000400000-0x00000000004F2000-memory.dmp