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Analysis
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max time kernel
103s -
max time network
104s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
28/10/2024, 08:14
General
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Target
ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.exe
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Size
783KB
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MD5
665d25b23b263b2654de48bfefeb68e0
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SHA1
fbe169375d8b8d4864cf924495f9c3559d0e86bf
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SHA256
ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2
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SHA512
1b3688f94a1e390b411b3224c1681d2cfdb63a7cf3277b8cb168a29c59c8af017526938a36b06b481dcf9317befef5d9e16a3c2aa9f572ce5189c04e89a718c2
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SSDEEP
12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:m+OQbpbgsFdAyQvzSqaq8q
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 6 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 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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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 8 IoCs
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Drops file in Program Files directory 4 IoCs
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Drops file in Windows directory 4 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 18 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\ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.exe"C:\Users\Admin\AppData\Local\Temp\ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.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 Program Files 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\RyfzN4eHKA.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:\Windows\System32\TetheringMgr\backgroundTaskHost.exe"C:\Windows\System32\TetheringMgr\backgroundTaskHost.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 "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\SuggestionUI\TextInputHost.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 "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\TetheringMgr\backgroundTaskHost.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:\PerfLogs\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 "sihost" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\es-ES\sihost.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 "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\RMActivate\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 "explorer" /sc ONLOGON /tr "'C:\PerfLogs\explorer.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
219B
MD576f93d7b61dcf944d531a8b9c6dcfd1a
SHA126b86ff06f07cc1ae0fddfb34ee4aaea61f77251
SHA25624f497cbe9f9086e61487baebdfde1ff7e37ef6185d596055aa4c8db67341a4c
SHA512e4618d5b60dab4305dbc76f6e520b677ae47c2b29b2bc092cf0703638d820299f92dfa1df4ab30acac3a1b2c4841948d72a5b61d6ae9739e483beb6226fb5510
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Filesize
783KB
MD5665d25b23b263b2654de48bfefeb68e0
SHA1fbe169375d8b8d4864cf924495f9c3559d0e86bf
SHA256ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2
SHA5121b3688f94a1e390b411b3224c1681d2cfdb63a7cf3277b8cb168a29c59c8af017526938a36b06b481dcf9317befef5d9e16a3c2aa9f572ce5189c04e89a718c2
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Filesize
32KB
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Filesize
10.8MB
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Filesize
64KB
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Filesize
32KB
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Filesize
32KB
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Filesize
48KB
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Filesize
40KB
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Filesize
40KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
8KB
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Filesize
32KB
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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
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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
10.8MB
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Filesize
808KB
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Filesize
10.8MB
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Filesize
1.0MB