Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
28-11-2024 04:56
General
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Target
5cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e.exe
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Size
783KB
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MD5
308e34620e4b48c3ae64e4045a817229
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SHA1
d1312c2b2e9941f03f710af23e640cbfec175467
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SHA256
5cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e
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SHA512
bfc03956208d26b6833c4d8a750041ac021f313f2e009ce009a381b6134e72f0003b2cbf8982d748587a21e249a45c3d21fb1daadd48521969830a37e5241d6d
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK2:G+OQbpbgsFdAyQvzSqaq8qt
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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UAC bypass 3 TTPs 3 IoCs
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DCRat payload 3 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 2 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 17 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 3 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\5cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e.exe"C:\Users\Admin\AppData\Local\Temp\5cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e.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\GraphicsPerfSvc\taskhostw.exe"C:\Windows\System32\GraphicsPerfSvc\taskhostw.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "MusNotification" /sc ONLOGON /tr "'C:\Windows\System32\fdWSD\MusNotification.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\ulib\spoolsv.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\PrintDialog\microsoft.system.package.metadata\Autogen\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\GraphicsPerfSvc\taskhostw.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\123.0.6312.123\lsass.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "5cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e" /sc ONLOGON /tr "'C:\ProgramData\Packages\Microsoft.549981C3F5F10_8wekyb3d8bbwe\S-1-5-21-2045521122-590294423-3465680274-1000\5cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e.exe'" /rl HIGHEST /f1⤵
- 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
MD54df68b73d65b6ff098f314c8130135ea
SHA1c3035925901cc3f7fb16fb94e120f745fb9ee042
SHA2568ad60c8d88047f2a4a61be4f574f4152f9a61db74a68e2b989a72e10efbe5ba1
SHA51249b7b0998463a5f2185bc0c24c6e8f277062e25bb6054283617a2f72f453d7749cd599981de4b4f2c0003ccce37d2ae82b62fd5c99f28c38d25a065e09c28367
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Filesize
783KB
MD5308e34620e4b48c3ae64e4045a817229
SHA1d1312c2b2e9941f03f710af23e640cbfec175467
SHA2565cd4495d7ec85110670306ec9a23f14afa8ca4db6249585ce7b543c52250327e
SHA512bfc03956208d26b6833c4d8a750041ac021f313f2e009ce009a381b6134e72f0003b2cbf8982d748587a21e249a45c3d21fb1daadd48521969830a37e5241d6d
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Filesize
32KB
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Filesize
10.8MB
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Filesize
8KB
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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
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
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
40KB
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Filesize
40KB
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Filesize
48KB
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Filesize
10.8MB
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
32KB
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Filesize
808KB
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Filesize
32KB