Analysis Overview
SHA256
1b42202ece42ad388bfc7130f23945748a26ef286e8478e3f800d7f552fe340f
Threat Level: Known bad
The file 15b7e0abf99ca0d676029e8b22498209_JaffaCakes118 was found to be: Known bad.
Malicious Activity Summary
Darkcomet
Modifies WinLogon for persistence
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Uses the VBS compiler for execution
Adds Run key to start application
Drops file in System32 directory
Suspicious use of SetThreadContext
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-27 10:49
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-27 10:49
Reported
2024-06-27 10:52
Platform
win7-20240508-en
Max time kernel
120s
Max time network
121s
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:\\Windows\\system32\\System32.exe" | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\System32.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Uses the VBS compiler for execution
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\DarkComet RAT = "C:\\Windows\\system32\\System32.exe" | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\JavaUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\JavaUpdtr\\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe" | C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\System32.exe | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
| File created | C:\Windows\SysWOW64\System32.exe | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2096 set thread context of 1664 | N/A | C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe | C:\Users\Admin\AppData\Local\Temp\vbc.exe |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe"
C:\Users\Admin\AppData\Local\Temp\vbc.exe
C:\Users\Admin\AppData\Local\Temp\vbc.exe
C:\Windows\SysWOW64\System32.exe
"C:\Windows\system32\System32.exe"
Network
Files
memory/2096-0-0x0000000073FF1000-0x0000000073FF2000-memory.dmp
memory/2096-1-0x0000000073FF0000-0x000000007459B000-memory.dmp
memory/2096-2-0x0000000073FF0000-0x000000007459B000-memory.dmp
\Users\Admin\AppData\Local\Temp\vbc.exe
| MD5 | 34aa912defa18c2c129f1e09d75c1d7e |
| SHA1 | 9c3046324657505a30ecd9b1fdb46c05bde7d470 |
| SHA256 | 6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386 |
| SHA512 | d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98 |
memory/1664-9-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-19-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-29-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-27-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1664-23-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-21-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-17-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-15-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-11-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-13-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-30-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/1664-31-0x00000000003F0000-0x00000000003F1000-memory.dmp
memory/1664-32-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/2096-38-0x0000000073FF0000-0x000000007459B000-memory.dmp
memory/1664-42-0x0000000000400000-0x00000000004B2000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-27 10:49
Reported
2024-06-27 10:52
Platform
win10v2004-20240508-en
Max time kernel
92s
Max time network
93s
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:\\Windows\\system32\\System32.exe" | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\System32.exe | N/A |
Uses the VBS compiler for execution
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JavaUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\JavaUpdtr\\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe" | C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DarkComet RAT = "C:\\Windows\\system32\\System32.exe" | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\System32.exe | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
| File created | C:\Windows\SysWOW64\System32.exe | C:\Users\Admin\AppData\Local\Temp\vbc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2736 set thread context of 3984 | N/A | C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe | C:\Users\Admin\AppData\Local\Temp\vbc.exe |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\15b7e0abf99ca0d676029e8b22498209_JaffaCakes118.exe"
C:\Users\Admin\AppData\Local\Temp\vbc.exe
C:\Users\Admin\AppData\Local\Temp\vbc.exe
C:\Windows\SysWOW64\System32.exe
"C:\Windows\system32\System32.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
Files
memory/2736-0-0x0000000074A22000-0x0000000074A23000-memory.dmp
memory/2736-1-0x0000000074A20000-0x0000000074FD1000-memory.dmp
memory/2736-2-0x0000000074A20000-0x0000000074FD1000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\vbc.exe
| MD5 | d881de17aa8f2e2c08cbb7b265f928f9 |
| SHA1 | 08936aebc87decf0af6e8eada191062b5e65ac2a |
| SHA256 | b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0 |
| SHA512 | 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34 |
memory/3984-7-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/3984-10-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/3984-12-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/3984-14-0x0000000000400000-0x00000000004B2000-memory.dmp
memory/3984-26-0x00000000023B0000-0x00000000023B1000-memory.dmp
memory/2736-25-0x0000000074A20000-0x0000000074FD1000-memory.dmp
memory/3984-28-0x0000000000400000-0x00000000004B2000-memory.dmp