Analysis
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max time kernel
94s -
max time network
130s -
platform
windows10-2004_x64 -
resource
win10v2004-20250129-en -
resource tags
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submitted
04-02-2025 00:24
General
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Target
6b0695a296b6d27be4a1f9665e6fc2299480519b4089c03aac92ee47743604b1.exe
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Size
1.2MB
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MD5
9828e0f930566ca33859b9e0de855fb8
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SHA1
fda3c146de18d4346bb5f0187a2b6ee8387096f3
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SHA256
6b0695a296b6d27be4a1f9665e6fc2299480519b4089c03aac92ee47743604b1
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SHA512
3a56b0edddb959dc85c28c337e09adc39594171c5e8bcdfc54cc36fb360bd52cb4395d4c3b55a9be58b8e654c5ec1ceab3e353cc71749ca74db4d4d5b656adbd
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SSDEEP
24576:+fD0xM0PfkpQULK/ZVAQNaqEtwHKWOb/fCrSr+4:N604jLKQmXHbV
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 4 IoCs
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Process spawned unexpected child process 4 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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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 8 IoCs
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Drops file in System32 directory 5 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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Modifies registry class 1 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 2 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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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\6b0695a296b6d27be4a1f9665e6fc2299480519b4089c03aac92ee47743604b1.exe"C:\Users\Admin\AppData\Local\Temp\6b0695a296b6d27be4a1f9665e6fc2299480519b4089c03aac92ee47743604b1.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Windows Mail\OfficeClickToRun.exe"C:\Program Files (x86)\Windows Mail\OfficeClickToRun.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Users\Admin\Music\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 "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\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 "fontdrvhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\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 "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\usk\SppExtComObj.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
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.2MB
MD5cac37f550caba3b7d096cd632fb919c6
SHA15a3d43a6efb6b6fa0ee86adb005b4104305cfff7
SHA256457f4bd645e067b8b4a281a57fc8a831894d869242b1e11ec5735d77ad6d2400
SHA51231e463aa902caf703bb63ee42a02e0470604ab7e230c48a47a6c86d3bb5b7d9d43129e8019c449127c8e081128d702a25c5183d31d1f73c3fe62227b3c6a0783
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Filesize
1.2MB
MD59828e0f930566ca33859b9e0de855fb8
SHA1fda3c146de18d4346bb5f0187a2b6ee8387096f3
SHA2566b0695a296b6d27be4a1f9665e6fc2299480519b4089c03aac92ee47743604b1
SHA5123a56b0edddb959dc85c28c337e09adc39594171c5e8bcdfc54cc36fb360bd52cb4395d4c3b55a9be58b8e654c5ec1ceab3e353cc71749ca74db4d4d5b656adbd
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Filesize
1.2MB
MD58cde8ead00ce383d6c227945c37536ed
SHA15736ff0d8b971b9c4ee52734574408b0f119de9e
SHA256915f529185f1d6703ed8b82caef5485e9e44d367642e00905a6f486d0260d6cb
SHA512d6e3ff7a83b4357360a3ef2f15d115f5b42cebe43a736947c89876987a4787fcaad1a059a5ead9c7a0ca008304bd69d1210c02bc96a39baa78f222ff4b0e7ee8
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Filesize
32KB
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Filesize
40KB
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Filesize
32KB
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Filesize
8KB
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Filesize
48KB
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Filesize
40KB
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Filesize
48KB
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Filesize
32KB
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Filesize
64KB
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Filesize
10.8MB
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Filesize
1.2MB
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Filesize
10.8MB