Analysis
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max time kernel
139s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
03-11-2024 09:57
General
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Target
004e2051dde231741f7be44ccc11a2ac05170785f1c2b702e8ae3ee8b3766ceeN.exe
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Size
952KB
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MD5
b86ee30e813ada623950e69411e39f20
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SHA1
8027da1ceaf274b125b2499404f44933ce8c1cf3
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SHA256
004e2051dde231741f7be44ccc11a2ac05170785f1c2b702e8ae3ee8b3766cee
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SHA512
c9d16edd860b01f893ee47dd65dea0ee3779015b4039a0fdf05a6567dd5ecdb87ec8012a8306e0237a0675a27e9b3db6553a10fb941336f26fd468fa85ef5fd9
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SSDEEP
24576:2+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:R8/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 5 IoCs
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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 10 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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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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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 3 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\004e2051dde231741f7be44ccc11a2ac05170785f1c2b702e8ae3ee8b3766ceeN.exe"C:\Users\Admin\AppData\Local\Temp\004e2051dde231741f7be44ccc11a2ac05170785f1c2b702e8ae3ee8b3766ceeN.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
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\netcorehc\winlogon.exe"C:\Windows\System32\netcorehc\winlogon.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 "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\netcorehc\winlogon.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 "upfc" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\upfc.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 "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\ipsmsnap\taskhostw.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:\PerfLogs\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 "fontdrvhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\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
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
MD5b86ee30e813ada623950e69411e39f20
SHA18027da1ceaf274b125b2499404f44933ce8c1cf3
SHA256004e2051dde231741f7be44ccc11a2ac05170785f1c2b702e8ae3ee8b3766cee
SHA512c9d16edd860b01f893ee47dd65dea0ee3779015b4039a0fdf05a6567dd5ecdb87ec8012a8306e0237a0675a27e9b3db6553a10fb941336f26fd468fa85ef5fd9
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Filesize
40KB
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Filesize
48KB
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Filesize
64KB
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Filesize
40KB
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Filesize
48KB
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Filesize
8KB
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Filesize
32KB
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Filesize
64KB
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Filesize
40KB
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Filesize
48KB
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Filesize
10.8MB
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Filesize
976KB
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Filesize
10.8MB
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Filesize
1.0MB