Analysis
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max time kernel
94s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
21-11-2024 00:52
General
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Target
7a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930.exe
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Size
4.1MB
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MD5
fc12e64914d68aa8fcacfe14eac14973
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SHA1
ffb90d0353325044a8e77a1b3d32c157e522ec6e
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SHA256
7a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930
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SHA512
6d2ff1530504b6a3fccb9bc2fce1e0844b5d901407af185b7b9b827896cfce26ea97f230d1f68ee577cf1665a4d0d2fe5b34532634dcc2bd05d5ff2ce77fbae0
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SSDEEP
98304:cBLZABTF8Ic94u3YveXYBLZABTF8Ic94u3YveXB:cBZAB+33Y2oBZAB+33Y2x
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 5 IoCs
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Process spawned unexpected child process 5 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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DCRat payload 2 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE 1 IoCs
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Adds Run key to start application 2 TTPs 10 IoCs
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Drops file in Program Files directory 2 IoCs
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Drops file in Windows directory 2 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 5 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 6 IoCs
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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\7a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930.exe"C:\Users\Admin\AppData\Local\Temp\7a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Z7f6rw6GNP.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:23⤵
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C:\PerfLogs\RuntimeBroker.exe"C:\PerfLogs\RuntimeBroker.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\PerfLogs\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\Registry.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "7a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\{4086FFA7-8D75-4280-9DEE-24055832CEB6} - OProcSessId\7a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\splwow64\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\PerfLogs\upfc.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
4.1MB
MD5fc12e64914d68aa8fcacfe14eac14973
SHA1ffb90d0353325044a8e77a1b3d32c157e522ec6e
SHA2567a51c74f9e3082a8fdc5b2aa00d105ac565ed3a696b7b59ec562f0a15cf77930
SHA5126d2ff1530504b6a3fccb9bc2fce1e0844b5d901407af185b7b9b827896cfce26ea97f230d1f68ee577cf1665a4d0d2fe5b34532634dcc2bd05d5ff2ce77fbae0
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Filesize
193B
MD5e2ba17d4c1eddf2a3efdb5f9c14007c0
SHA1cb77c41315e2f43f39465846a6e0c567ab941ecf
SHA256b9bafaa9fcdc8d2d318e9cac7dc502f26b42d7578b018f03deec39e6c8124928
SHA51255d5e07d9f9562bda263e76ab2478e8ced6556c4340c4e49287443b825ce53ead5dfdbc86a7033951def120732f2ac4034fc9859ce90b1b4a4fbd152f5277be0
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Filesize
8KB
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Filesize
2.1MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
32KB
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Filesize
32KB
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Filesize
48KB
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Filesize
344KB
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Filesize
32KB
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Filesize
48KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB