Analysis
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max time kernel
95s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
05-12-2024 22:18
General
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Target
58b9de28af1f31614bcf0a6f96f6e20a86295a23e411dd4f1f2b0e7a604b32f3.exe
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Size
783KB
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MD5
6803b89c021d6dc7a6cb6be7e46e6008
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SHA1
f1af0021522118f4391eb0e94ccc6b312e44d824
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SHA256
58b9de28af1f31614bcf0a6f96f6e20a86295a23e411dd4f1f2b0e7a604b32f3
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SHA512
af36b72347016c8a13dbac1a41775ba96a20b10116bb9bbb026cd5ee444077295a3c6f48cc13872b578254dcfdd603a1fe2c1ce78dc265398c194a04d34aa65a
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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 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 5 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 8 IoCs
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Drops file in Program Files directory 4 IoCs
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Drops file in Windows directory 1 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 16 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\58b9de28af1f31614bcf0a6f96f6e20a86295a23e411dd4f1f2b0e7a604b32f3.exe"C:\Users\Admin\AppData\Local\Temp\58b9de28af1f31614bcf0a6f96f6e20a86295a23e411dd4f1f2b0e7a604b32f3.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\MOAVtM1gf8.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 (x86)\Windows Multimedia Platform\dllhost.exe"C:\Program Files (x86)\Windows Multimedia Platform\dllhost.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 "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\WindowsInternal.Shell.CompUiActivation\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 "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\dllhost.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 "csrss" /sc ONLOGON /tr "'C:\PerfLogs\csrss.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
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\VhfUm\fontdrvhost.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
783KB
MD5daab5fb14b8ea182c7251ff7c66a53a9
SHA1bc23cbc04f9b6c07716be980bf79d17d26c6d991
SHA2561cf13ec774f4e750255f46d27147259385f3c79dcaf085ada1c4430d2f4d6d78
SHA512e414c41d8b542e7c3d508efb0bec920bccf4a2a0c9acae0e49eddaa92ca8b07d9b107ee7304764ed1387923ee03354acdfb32754a56882b3eda176382f1bb23c
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Filesize
783KB
MD56191f2805af53d77fb31db663819737f
SHA1ac8acb03a18f0b4594c0bfd6eb8828e5d5a4e674
SHA2565bddcb7d67212bba1b1a3df0d9c2c232c48f7f7419efd183ac0720330e56cf92
SHA512eac25c11f353f2ba28f59dee63709c4204ac56cecb49724ef215eb4655c3495f3225014d4960fbcd2de74232698fb25c264b9ee6350805619a225d3b7d1db30c
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Filesize
226B
MD54d0cf8ad64a1253ed5924f0d39195a83
SHA1ac0a5c29b7c48d8562e6ac83279547fe5190c1e5
SHA2561ca81abaf7ecdae4dfe681671838e148d6e28a88dcf99b1efb78b641fde29959
SHA512bfe442ef8047fa07b0c7abbb136bb3c3b537b0b86a7214fddafa2617e277aa9cabe02a5ea117e265dc80243140b0722b8a899c1236cac26c37d0ed5d6259ca29
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Filesize
783KB
MD56803b89c021d6dc7a6cb6be7e46e6008
SHA1f1af0021522118f4391eb0e94ccc6b312e44d824
SHA25658b9de28af1f31614bcf0a6f96f6e20a86295a23e411dd4f1f2b0e7a604b32f3
SHA512af36b72347016c8a13dbac1a41775ba96a20b10116bb9bbb026cd5ee444077295a3c6f48cc13872b578254dcfdd603a1fe2c1ce78dc265398c194a04d34aa65a
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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
40KB
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Filesize
32KB
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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
64KB
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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
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
32KB
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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
808KB