Analysis
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max time kernel
93s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
22-01-2025 22:39
General
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Target
3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4N.exe
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Size
783KB
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MD5
b8d3a762bae9978720cf91014a5a84b0
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SHA1
034a5a6146c211782ae20b57095fa2ae87e5127b
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SHA256
3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4
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SHA512
3f5dff93777057eff4c08d13319f5d46583c8968a18abd495b2e9569dbcbaf20d20bb01785407c2e760dabeecb992733c137b375702360586345b5370fdf427e
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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 7 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 4 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 7 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 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 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 19 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\3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4N.exe"C:\Users\Admin\AppData\Local\Temp\3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4N.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\GtvrMyZ4PB.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:\ProgramData\Oracle\Java\.oracle_jre_usage\MusNotification.exe"C:\ProgramData\Oracle\Java\.oracle_jre_usage\MusNotification.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 "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\fdBth\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 "MusNotification" /sc ONLOGON /tr "'C:\ProgramData\Oracle\Java\.oracle_jre_usage\MusNotification.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:\Windows\PolicyDefinitions\uk-UA\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 "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\DdcComImplementationsDesktop\spoolsv.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 "unsecapp" /sc ONLOGON /tr "'C:\Users\Default\Desktop\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 "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\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 "dwm" /sc ONLOGON /tr "'C:\Windows\System32\puiapi\dwm.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
MD5daaff30018c04a40752dc8bbc680da04
SHA157eba4a7a6d733fee32bfaa0bc2595a110dc48b6
SHA256837276ac8fe21b30e396d9af85cbc7174b9dfdaefc96eed4d22e5a975567da1c
SHA5120a9b591db266640bf40970205d2db6f4bc02d9da5ca1c4de515f1f7ba6862a7694a6b5170952928a4f1789c468e69a67a2fd2e14b6490e0023a7ed319bde94f5
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Filesize
228B
MD54ae66639b91e828429c80661d1eb5108
SHA1f02882ac786dcc1bb75c2ef2352bc038ec7f40d5
SHA256da43db562878efaefbb7c091cead5ec1fb1f5dbfe26e875d1a7cc21b5e539fbf
SHA5124104ef22e5617df0bbbd2648ea2f064982f352a3976db3e27554f913aef51d46e484ca92ca64f51e0a1e72d8f4a7891f332832b641266b52eb08dbc4f011d736
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Filesize
783KB
MD5b8d3a762bae9978720cf91014a5a84b0
SHA1034a5a6146c211782ae20b57095fa2ae87e5127b
SHA2563bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4
SHA5123f5dff93777057eff4c08d13319f5d46583c8968a18abd495b2e9569dbcbaf20d20bb01785407c2e760dabeecb992733c137b375702360586345b5370fdf427e
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Filesize
32KB
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Filesize
32KB
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Filesize
48KB
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Filesize
64KB
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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
32KB
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Filesize
32KB
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Filesize
8KB
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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
40KB
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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
10.8MB
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Filesize
8KB
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Filesize
10.8MB
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Filesize
808KB
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Filesize
808KB