Analysis Overview
SHA256
69ec29e540120ba091110e2ff51bddd3b67c5de8eb466959d2bb24316f5e813c
Threat Level: Known bad
The file JaffaCakes118_25d94481f4967537d4b75902827e1948 was found to be: Known bad.
Malicious Activity Summary
Darkcomet
Darkcomet family
Modifies WinLogon for persistence
Executes dropped EXE
Loads dropped DLL
Uses the VBS compiler for execution
Adds Run key to start application
Suspicious use of SetThreadContext
Unsigned PE
System Network Configuration Discovery: Internet Connection Discovery
System Location Discovery: System Language Discovery
Runs ping.exe
Suspicious use of AdjustPrivilegeToken
Modifies registry class
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-02-26 12:11
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-26 12:11
Reported
2025-02-26 12:13
Platform
win7-20240729-en
Max time kernel
63s
Max time network
17s
Command Line
Signatures
Darkcomet
Darkcomet family
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:\\Windupdt\\winupdate.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windupdt\winupdate.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1096 set thread context of 2892 | N/A | C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\PING.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windupdt\winupdate.exe | N/A |
System Network Configuration Discovery: Internet Connection Discovery
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windupdt\winupdate.exe
"C:\Windupdt\winupdate.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5 > NUL&del "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 5
Network
Files
memory/1096-0-0x0000000073EF1000-0x0000000073EF2000-memory.dmp
memory/1096-1-0x0000000073EF0000-0x000000007449B000-memory.dmp
memory/1096-2-0x0000000073EF0000-0x000000007449B000-memory.dmp
memory/2892-3-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-16-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-15-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2892-12-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-11-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-10-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-9-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-8-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-7-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-5-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-17-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-18-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2892-20-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/1096-19-0x0000000073EF0000-0x000000007449B000-memory.dmp
\Windupdt\winupdate.exe
| MD5 | 34aa912defa18c2c129f1e09d75c1d7e |
| SHA1 | 9c3046324657505a30ecd9b1fdb46c05bde7d470 |
| SHA256 | 6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386 |
| SHA512 | d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98 |
memory/2892-31-0x0000000000400000-0x00000000004B3000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-26 12:11
Reported
2025-02-26 12:13
Platform
win10v2004-20250217-en
Max time kernel
111s
Max time network
146s
Command Line
Signatures
Darkcomet
Darkcomet family
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:\\Windupdt\\winupdate.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windupdt\winupdate.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-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3252 set thread context of 1432 | N/A | C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe |
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\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windupdt\winupdate.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\PING.EXE | N/A |
System Network Configuration Discovery: Internet Connection Discovery
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_25d94481f4967537d4b75902827e1948.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windupdt\winupdate.exe
"C:\Windupdt\winupdate.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5 > NUL&del "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 5
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
Files
memory/3252-0-0x0000000075372000-0x0000000075373000-memory.dmp
memory/3252-1-0x0000000075370000-0x0000000075921000-memory.dmp
memory/3252-2-0x0000000075370000-0x0000000075921000-memory.dmp
memory/1432-3-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/1432-4-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/1432-6-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/3252-7-0x0000000075370000-0x0000000075921000-memory.dmp
memory/1432-8-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/1432-9-0x0000000000400000-0x00000000004B3000-memory.dmp
C:\Windupdt\winupdate.exe
| MD5 | d881de17aa8f2e2c08cbb7b265f928f9 |
| SHA1 | 08936aebc87decf0af6e8eada191062b5e65ac2a |
| SHA256 | b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0 |
| SHA512 | 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34 |
memory/1432-70-0x0000000000400000-0x00000000004B3000-memory.dmp