Analysis
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max time kernel
94s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
12-11-2024 08:36
General
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Target
119ede06afc1b721278e8955fe8338f4.exe
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Size
1.1MB
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MD5
119ede06afc1b721278e8955fe8338f4
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SHA1
3917c6cfd13689a83e8410c157f54c0e05550bcf
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SHA256
ad4072aa43c0fcac0cc0c5f86147c93fb16707a547d7760407a02be06bf9d8f0
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SHA512
72193ded81941ecef91da566d47e22667e98d927a18cbe06be3e4cbea6c1504664a7569fd9531ddbf1b4b019a953e53deb8da34938d1b879b4d74902eff3be78
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SSDEEP
24576:AMYPCI+q+U4cIG409ozWucypk1Nd4AX+iB/YjuM6kyh+:ABPZ0Kr1FXHB/guM6k+
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 15 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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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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Drops file in Program Files directory 2 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 15 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 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\119ede06afc1b721278e8955fe8338f4.exe"C:\Users\Admin\AppData\Local\Temp\119ede06afc1b721278e8955fe8338f4.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- 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
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\cxKS4C7dQ8.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:\Windows\ShellComponents\upfc.exe"C:\Windows\ShellComponents\upfc.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.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 "smsss" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\smss.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 "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Google\dllhost.exe'" /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:\Program Files (x86)\Google\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 "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Google\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 "upfcu" /sc MINUTE /mo 14 /tr "'C:\Windows\ShellComponents\upfc.exe'" /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:\Windows\ShellComponents\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 "upfcu" /sc MINUTE /mo 11 /tr "'C:\Windows\ShellComponents\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 "SppExtComObjS" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\Microsoft\Speech_OneCore\SppExtComObj.exe'" /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:\Users\All Users\Microsoft\Speech_OneCore\SppExtComObj.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 "SppExtComObjS" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\Microsoft\Speech_OneCore\SppExtComObj.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 "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Windows\bcastdvr\dllhost.exe'" /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:\Windows\bcastdvr\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 "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Windows\bcastdvr\dllhost.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
200B
MD5e0c5830c4543938dcacf1097f71226c8
SHA18c126933a198b14bf2f73c9a4a3a7d8384d3c8d1
SHA2568bccd6eded46f662242c4a3fb375de86c3838af4aa5ce38608d339dd08083167
SHA5122b39914d5e0d8d033dd78714ccfd48089625d64df34bf1f1e8e022dbb3479479e254052cda551e2834bfd1703268e582f942529ed7f756193a354ebd202cec1f
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Filesize
1.1MB
MD5119ede06afc1b721278e8955fe8338f4
SHA13917c6cfd13689a83e8410c157f54c0e05550bcf
SHA256ad4072aa43c0fcac0cc0c5f86147c93fb16707a547d7760407a02be06bf9d8f0
SHA51272193ded81941ecef91da566d47e22667e98d927a18cbe06be3e4cbea6c1504664a7569fd9531ddbf1b4b019a953e53deb8da34938d1b879b4d74902eff3be78
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Filesize
72KB
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Filesize
10.8MB
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Filesize
72KB
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Filesize
320KB
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Filesize
5.2MB
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Filesize
56KB
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Filesize
32KB
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Filesize
8KB
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Filesize
10.8MB
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Filesize
112KB
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Filesize
1.2MB