Analysis
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max time kernel
93s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
11-12-2024 19:46
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 6 IoCs
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Process spawned unexpected child process 6 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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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 12 IoCs
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Drops file in System32 directory 2 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 6 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 7 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\8B744166EECACE320158F4D0F704B13E.exe"C:\Users\Admin\AppData\Local\Temp\8B744166EECACE320158F4D0F704B13E.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- 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\O4DNNjZLMj.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:\Recovery\WindowsRE\OfficeClickToRun.exe"C:\Recovery\WindowsRE\OfficeClickToRun.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.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 "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.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 "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\sqlsrv32\winlogon.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 "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVFileSystemMetadata\OfficeClickToRun.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 "sysmon" /sc ONLOGON /tr "'C:\Users\Admin\Templates\sysmon.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 "sysmon" /sc ONLOGON /tr "'C:\Windows\PFRO\sysmon.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
206B
MD5c78788644b855b2dd4dfdb6e5f7acb2a
SHA163d1f7d6d1445b9780da539a2fe1a017226bb262
SHA256ff8bda1064d742ead5a0806a7b9bb37266c3f6c6a3e9dcc4ed59c21003b0b4a3
SHA512e6b5ad29f1d8538b61b5a151d438d330e2946d83536ed0f5ac93ad6d07c0c78fdaf803adc212ef30480e6f052da310051dc038113770f1872df394ce634aef8a
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Filesize
2.7MB
MD58b744166eecace320158f4d0f704b13e
SHA1b92636084b3bd914514bc44556c4803933d667a3
SHA256aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9
SHA512641b3065e30186ccf9ba84ce6d345565763bbdb5fc1b1201c3f08fce5466c2384250b85b4c0220d2b9e21c5a51ff5ef60e9b910e07107e2b7e06f97b4e429d27
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Filesize
8KB
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Filesize
2.7MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
48KB
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Filesize
48KB
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Filesize
48KB
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Filesize
40KB
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Filesize
32KB