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
07-11-2024 19:35
General
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Target
097054f17509ff1370a6954f8d69c873d8013a9d8439cc623545d583f4b263de.exe
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Size
952KB
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MD5
80fd1427a8a08ad8f16a5a091d3080d5
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SHA1
16e6e7fdec42cdb1216c1ec28a3760135f6b5e1f
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SHA256
097054f17509ff1370a6954f8d69c873d8013a9d8439cc623545d583f4b263de
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SHA512
8f321556d6b2cc8a5605e928534d29034587de4af47df149153fa9f636c56afb730a55a1ad01f491d531c4315bc31aefadd09462257478416636b9aba8672612
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SSDEEP
24576:W+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:x8/KfRTK
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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Modifies WinLogon for persistence 2 TTPs 3 IoCs
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Process spawned unexpected child process 3 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 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 6 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 10 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 1 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\097054f17509ff1370a6954f8d69c873d8013a9d8439cc623545d583f4b263de.exe"C:\Users\Admin\AppData\Local\Temp\097054f17509ff1370a6954f8d69c873d8013a9d8439cc623545d583f4b263de.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\ProgramData\Documents\dllhost.exe"C:\ProgramData\Documents\dllhost.exe"2⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\mpssvc\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 "dllhost" /sc ONLOGON /tr "'C:\ProgramData\Documents\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 "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\msinfo32\backgroundTaskHost.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
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
952KB
MD580fd1427a8a08ad8f16a5a091d3080d5
SHA116e6e7fdec42cdb1216c1ec28a3760135f6b5e1f
SHA256097054f17509ff1370a6954f8d69c873d8013a9d8439cc623545d583f4b263de
SHA5128f321556d6b2cc8a5605e928534d29034587de4af47df149153fa9f636c56afb730a55a1ad01f491d531c4315bc31aefadd09462257478416636b9aba8672612
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Filesize
952KB
MD58143e3005ff79ad7e7ea3a074dff1fef
SHA1d700ee23121b30e7715f2cf5dbc4d3a7eea6f36b
SHA25640c527db9606c9e767a0ccb4ae6e349f606b0ab561700d272a35a68320794fff
SHA512839cf3484197dd3f3d3873c2c374fbd95684f2f84cae613e49825e813f853a61a534f5803c87643760c0108fcc5d73f990254352c07a5f95ef1f35dc12630bb4
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Filesize
1.0MB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
40KB
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Filesize
48KB
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Filesize
40KB
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Filesize
32KB
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Filesize
48KB
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Filesize
48KB
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Filesize
40KB
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Filesize
64KB
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Filesize
64KB
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Filesize
10.8MB
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Filesize
976KB