Analysis
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max time kernel
95s -
max time network
129s -
platform
windows10-2004_x64 -
resource
win10v2004-20250129-en -
resource tags
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submitted
02-02-2025 23:26
General
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Target
591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe
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Size
2.2MB
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MD5
86f0b098d34e7964a9da4131d1d58fa9
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SHA1
614cbbda0058cefe56cf2e9c0db2e06f95a195a5
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SHA256
591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de
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SHA512
ca8bb85f6c5cf9766806965d00d9ceaaa490fc93c88fa70de27542cd5520c428a48e9a91c912940858e4c3948f4bc362ce98c76a2e24099341c88f9e3a2289a3
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SSDEEP
24576:tg/TM3unSV8JHYj0M14oMKhqN8+r/tse9WPJXelRWjq+jPx8FT2t6nTtHtO3g4Jc:mQenScjKkr/y+qXeliq+iT2t60g7Er3
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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Process spawned unexpected child process 4 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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UAC bypass 3 TTPs 6 IoCs
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DCRat payload 3 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 4 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 5 IoCs
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Drops file in Windows directory 6 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 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 64 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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System policy modification 1 TTPs 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\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe"C:\Users\Admin\AppData\Local\Temp\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe"1⤵
- UAC bypass
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\VO4xrFnuQ8.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:\ProgramData\USOShared\Logs\User\fontdrvhost.exe"C:\ProgramData\USOShared\Logs\User\fontdrvhost.exe"3⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\ProgramData\regid.1991-06.com.microsoft\fontdrvhost.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 "fontdrvhost" /sc ONLOGON /tr "'C:\ProgramData\USOShared\Logs\User\fontdrvhost.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 "taskhostw" /sc ONLOGON /tr "'C:\Windows\Containers\serviced\taskhostw.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 "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\OkDone_80.contrast-black\taskhostw.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
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.2MB
MD586f0b098d34e7964a9da4131d1d58fa9
SHA1614cbbda0058cefe56cf2e9c0db2e06f95a195a5
SHA256591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de
SHA512ca8bb85f6c5cf9766806965d00d9ceaaa490fc93c88fa70de27542cd5520c428a48e9a91c912940858e4c3948f4bc362ce98c76a2e24099341c88f9e3a2289a3
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Filesize
214B
MD5b58e376a63a1de5fc0b3ec7048e91483
SHA19fbc6317fe47feae0e7a6267fd04b8fd91fce11d
SHA2566da93ab64b7fc554277f69b86dc9527ccdb26b720cb60874e8240a0055a75d61
SHA512bc209fc4f33daa5ff53baae2d705a014a64b6697057bc9f5bb6bf5a29dc271d3599d9e7d42618f9a1ec25fe841c996892ed2993a151fdfb2649f66f9b66f07d3
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Filesize
2.2MB
MD5458b0a612c23dc2505cd6e3718b63351
SHA1e1c42485a3d095d2147fbd8a9191fdff6d2dc794
SHA25616c7c9d793ab13b0d793581a7d882a2cc8c3b77a811b0ffab997a57c73a14074
SHA51273f5b0eb08ef90c5adc02da1d16af2c8464f54d1123db76761a67caab3b4310103e62b5164bd50b61221845c0671be10f879f26e0947459f2dce9ab77d84a634
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Filesize
344KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
344KB
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Filesize
40KB
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Filesize
40KB
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Filesize
32KB
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Filesize
48KB
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Filesize
48KB
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Filesize
8KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
64KB
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Filesize
48KB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
10.8MB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
2.3MB