Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
08-11-2024 06:00
General
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Target
f1c2810c41b2ce2c8755377c3644d17762137d662ef4f03b7cddd3db992c60fc.exe
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Size
2.3MB
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MD5
efeb65d7748ea77088bf95d64d01dab9
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SHA1
76204068586a564ed47909d98399f5b62dad8bc9
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SHA256
f1c2810c41b2ce2c8755377c3644d17762137d662ef4f03b7cddd3db992c60fc
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SHA512
016711a46294ff3d00ccaae375173aadc6f6e7e0ee0a20e696a76090849e135dbd57b07d3031239667e3d3e99050edc421e143bcbded64554948e4c73545ba4e
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SSDEEP
49152:NNAjgh7ll3AWyyks+zsfkRgpc/OCuYxziOHpXw8y7yuzGOni:/lh7ll3ATyks+QfMlJxziONuGii
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
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Process spawned unexpected child process 9 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 6 IoCs
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Drops file in Program Files directory 7 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 9 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 8 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\f1c2810c41b2ce2c8755377c3644d17762137d662ef4f03b7cddd3db992c60fc.exe"C:\Users\Admin\AppData\Local\Temp\f1c2810c41b2ce2c8755377c3644d17762137d662ef4f03b7cddd3db992c60fc.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Program Files 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\S7I4cuHJCM.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:\Program Files\Google\Chrome\Application\unsecapp.exe"C:\Program Files\Google\Chrome\Application\unsecapp.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Program Files\Google\Chrome\Application\unsecapp.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\unsecapp.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 "unsecappu" /sc MINUTE /mo 8 /tr "'C:\Program Files\Google\Chrome\Application\unsecapp.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 "taskhostwt" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Sidebar\taskhostw.exe'" /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:\Program Files (x86)\Windows Sidebar\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 "taskhostwt" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Sidebar\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 "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Google\Chrome\RuntimeBroker.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\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 "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files\Google\Chrome\RuntimeBroker.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
2.3MB
MD5efeb65d7748ea77088bf95d64d01dab9
SHA176204068586a564ed47909d98399f5b62dad8bc9
SHA256f1c2810c41b2ce2c8755377c3644d17762137d662ef4f03b7cddd3db992c60fc
SHA512016711a46294ff3d00ccaae375173aadc6f6e7e0ee0a20e696a76090849e135dbd57b07d3031239667e3d3e99050edc421e143bcbded64554948e4c73545ba4e
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Filesize
220B
MD5bb1fe8017ba59f867f81b61b925cc720
SHA13c4d8ca97656c09bac082d93013e5bca33cc6d8d
SHA2565662b8a58293b2e080032d10b4a6f302506b14375b48a38adc2d1edf44721577
SHA51217ee4f0d939fc4aadd7bc8639b21ad30af86d8b3938d7848fffc66a5bc66fb40bbff3019179765879341297994e668ad47a9e1217493835e47f252945c9ba398
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Filesize
72KB
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Filesize
344KB
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Filesize
5.2MB
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Filesize
320KB
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Filesize
112KB
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Filesize
72KB
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Filesize
8KB
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Filesize
32KB
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Filesize
32KB
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Filesize
56KB
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Filesize
10.8MB
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Filesize
88KB
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Filesize
344KB
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Filesize
10.8MB
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Filesize
2.3MB