Analysis
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max time kernel
93s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20240709-en -
resource tags
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submitted
25-07-2024 23:47
General
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Target
3198855be37e8b8300dfee1182a774d0N.exe
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Size
784KB
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MD5
3198855be37e8b8300dfee1182a774d0
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SHA1
b47d7b51322f4b40cdccfca8db2825d2a9612e46
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SHA256
3a303cda66f8030434b0b25938e6d49d52c66c9a65b6159050412f3c09eb9013
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SHA512
7be8f07bce9fe85de04e54e9cfde2b1683691abe6e5069eca718c1bd13d1aa8df06ecaf9cabaca63f49c2a7355cc4faed5ac38d02e8310eb377b562d88203d1f
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SSDEEP
12288:+qnO8YpD1oOJp+Ce1PSiG2jfIBoI5DyDwYMDxFesH0ioBw7oKk2:++ORToOWSi5gBoS4wYUJ0eo2
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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Process spawned unexpected child process 5 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 5 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 12 IoCs
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Drops file in Program Files directory 5 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 24 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 2 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\3198855be37e8b8300dfee1182a774d0N.exe"C:\Users\Admin\AppData\Local\Temp\3198855be37e8b8300dfee1182a774d0N.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
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\explorer.exe"C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\explorer.exe"2⤵
- 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 "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\esevss\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 "explorer" /sc ONLOGON /tr "'C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\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 "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\MSFlacEncoder\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 "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\Windows.Internal.Graphics.Display.DisplayEnhancementManagement\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 "System" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office 15\ClientX64\System.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
784KB
MD53198855be37e8b8300dfee1182a774d0
SHA1b47d7b51322f4b40cdccfca8db2825d2a9612e46
SHA2563a303cda66f8030434b0b25938e6d49d52c66c9a65b6159050412f3c09eb9013
SHA5127be8f07bce9fe85de04e54e9cfde2b1683691abe6e5069eca718c1bd13d1aa8df06ecaf9cabaca63f49c2a7355cc4faed5ac38d02e8310eb377b562d88203d1f
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Filesize
32KB
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Filesize
10.8MB
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Filesize
32KB
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
48KB
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Filesize
32KB
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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
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
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
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
808KB
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Filesize
8KB