Analysis
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max time kernel
121s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
11-12-2024 19:46
Static task
static1
Behavioral task
behavioral1
Sample
8B744166EECACE320158F4D0F704B13E.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
8B744166EECACE320158F4D0F704B13E.exe
Resource
win10v2004-20241007-en
General
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Target
8B744166EECACE320158F4D0F704B13E.exe
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Size
2.7MB
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MD5
8b744166eecace320158f4d0f704b13e
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SHA1
b92636084b3bd914514bc44556c4803933d667a3
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SHA256
aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9
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SHA512
641b3065e30186ccf9ba84ce6d345565763bbdb5fc1b1201c3f08fce5466c2384250b85b4c0220d2b9e21c5a51ff5ef60e9b910e07107e2b7e06f97b4e429d27
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SSDEEP
24576:l+O4GuNVHU+AH2FWxOYIOlIZBrlsQBYI63DSyve5fG:s3N5IO6OtsMYIxS
Malware Config
Signatures
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Dcrat family
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Modifies WinLogon for persistence 2 TTPs 3 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\System32\\ROUTE\\services.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\System32\\ROUTE\\services.exe\", \"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPC\\OSPPSVC.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\System32\\ROUTE\\services.exe\", \"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPC\\OSPPSVC.exe\", \"C:\\Windows\\System32\\msvcp140\\winlogon.exe\"" 8B744166EECACE320158F4D0F704B13E.exe -
Process spawned unexpected child process 3 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2228 1840 schtasks.exe 30 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2132 1840 schtasks.exe 30 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2980 1840 schtasks.exe 30 -
Executes dropped EXE 1 IoCs
pid Process 2816 OSPPSVC.exe -
Adds Run key to start application 2 TTPs 6 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\ROUTE\\services.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\ROUTE\\services.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPC\\OSPPSVC.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPC\\OSPPSVC.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\msvcp140\\winlogon.exe\"" 8B744166EECACE320158F4D0F704B13E.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\msvcp140\\winlogon.exe\"" 8B744166EECACE320158F4D0F704B13E.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\System32\msvcp140\cc11b995f2a76da408ea6a601e682e64743153ad 8B744166EECACE320158F4D0F704B13E.exe File created C:\Windows\System32\ROUTE\services.exe 8B744166EECACE320158F4D0F704B13E.exe File opened for modification C:\Windows\System32\ROUTE\services.exe 8B744166EECACE320158F4D0F704B13E.exe File created C:\Windows\System32\ROUTE\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d 8B744166EECACE320158F4D0F704B13E.exe File created C:\Windows\System32\msvcp140\winlogon.exe 8B744166EECACE320158F4D0F704B13E.exe -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPC\1610b97d3ab4a74cd8ae104b51bea7bfcc5b9c6f 8B744166EECACE320158F4D0F704B13E.exe File created C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPC\OSPPSVC.exe 8B744166EECACE320158F4D0F704B13E.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8 OSPPSVC.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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 OSPPSVC.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2228 schtasks.exe 2132 schtasks.exe 2980 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 13 IoCs
pid Process 2420 8B744166EECACE320158F4D0F704B13E.exe 2420 8B744166EECACE320158F4D0F704B13E.exe 2420 8B744166EECACE320158F4D0F704B13E.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe 2816 OSPPSVC.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2420 8B744166EECACE320158F4D0F704B13E.exe Token: SeDebugPrivilege 2816 OSPPSVC.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2420 wrote to memory of 2840 2420 8B744166EECACE320158F4D0F704B13E.exe 34 PID 2420 wrote to memory of 2840 2420 8B744166EECACE320158F4D0F704B13E.exe 34 PID 2420 wrote to memory of 2840 2420 8B744166EECACE320158F4D0F704B13E.exe 34 PID 2840 wrote to memory of 2760 2840 cmd.exe 36 PID 2840 wrote to memory of 2760 2840 cmd.exe 36 PID 2840 wrote to memory of 2760 2840 cmd.exe 36 PID 2840 wrote to memory of 2816 2840 cmd.exe 38 PID 2840 wrote to memory of 2816 2840 cmd.exe 38 PID 2840 wrote to memory of 2816 2840 cmd.exe 38 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\8B744166EECACE320158F4D0F704B13E.exe"C:\Users\Admin\AppData\Local\Temp\8B744166EECACE320158F4D0F704B13E.exe"1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2420 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\pktyTdDoNP.bat"2⤵
- Suspicious use of WriteProcessMemory
PID:2840 -
C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:23⤵PID:2760
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C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPC\OSPPSVC.exe"C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPC\OSPPSVC.exe"3⤵
- Executes dropped EXE
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2816
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\ROUTE\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2228
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPC\OSPPSVC.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2132
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\msvcp140\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.7MB
MD58b744166eecace320158f4d0f704b13e
SHA1b92636084b3bd914514bc44556c4803933d667a3
SHA256aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9
SHA512641b3065e30186ccf9ba84ce6d345565763bbdb5fc1b1201c3f08fce5466c2384250b85b4c0220d2b9e21c5a51ff5ef60e9b910e07107e2b7e06f97b4e429d27
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Filesize
261B
MD59221382b38206256e6c0543f63d46e1c
SHA1698bb30d740fe0926fb2e6cc10c18f9c28fb6905
SHA25650d8629a95b98b83b2d53ebae6ca25b72189e084401a5cbe554d5b3e77044cfc
SHA512a6e6df3da0737b946b6d55476f5b5e4aa3da35249f932715785932e6a6c5e0f46e298298ed1899ddf61d975081f49ce7d830f4d066767b17fbfd10b86764a0f0