Analysis
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max time kernel
92s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
16-12-2024 02:14
General
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Target
5beb95e9c52536e5deb1099ee375559c4e46ff41f73e99af2f9367dd99f290f3N.exe
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Size
952KB
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MD5
723431372f19da7e4dab8fbd433ccca0
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SHA1
b9a8822d273051796975d7238980729376b4cd50
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SHA256
5beb95e9c52536e5deb1099ee375559c4e46ff41f73e99af2f9367dd99f290f3
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SHA512
26777d5f22d2a5ac073d3b3ae3333a329b12801a9b11dc0cbe629d4ca9c2e4d88f9286dde6fa1826afce3e6b535a560873b1835fb6bb311c8280d1527cbc40f8
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SSDEEP
24576:++O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:58/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 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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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 8 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 15 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 1 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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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\5beb95e9c52536e5deb1099ee375559c4e46ff41f73e99af2f9367dd99f290f3N.exe"C:\Users\Admin\AppData\Local\Temp\5beb95e9c52536e5deb1099ee375559c4e46ff41f73e99af2f9367dd99f290f3N.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
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\mDh0pf6SUP.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\System32\AppVEntSubsystems64\dllhost.exe"C:\Windows\System32\AppVEntSubsystems64\dllhost.exe"3⤵
- 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 "sihost" /sc ONLOGON /tr "'C:\Windows\System32\msdtcspoffln\sihost.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:\Windows\System32\AppVEntSubsystems64\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 "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\consent\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 "dllhost" /sc ONLOGON /tr "'C:\Documents and Settings\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
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
MD5723431372f19da7e4dab8fbd433ccca0
SHA1b9a8822d273051796975d7238980729376b4cd50
SHA2565beb95e9c52536e5deb1099ee375559c4e46ff41f73e99af2f9367dd99f290f3
SHA51226777d5f22d2a5ac073d3b3ae3333a329b12801a9b11dc0cbe629d4ca9c2e4d88f9286dde6fa1826afce3e6b535a560873b1835fb6bb311c8280d1527cbc40f8
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Filesize
215B
MD50d22eefa4a13f5a7b34227adfb608d81
SHA18ee9e31e964431346729b0b012173483e7f7065a
SHA2566f24c1bd49f68eca1c05511167e9f336497e65cc0584afa1bbf0c9c2ba75216e
SHA51269bcd64b305329aa5b6de73f6b422d42bf8b38788c2f8c414847ec357a1396baf371f44aa402937f4fe792d9956f5be2a45877d47d5c6a858b0aab55e0a0e341
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Filesize
40KB
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Filesize
64KB
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Filesize
64KB
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Filesize
40KB
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Filesize
8KB
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Filesize
48KB
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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
10.8MB
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Filesize
10.8MB
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Filesize
976KB