Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
01-12-2024 18:47
General
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Target
agentreviewPerf.exe
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Size
2.3MB
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MD5
4e69fcf73418a08fcb8b3e7e2ecb43c4
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SHA1
a3ecd09f65ca4e7821a0b7f8596edcd679573f5b
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SHA256
fa78ac8f4c94923c7e53a3bf6936b46aff02f7746ee9518460c2d529ea2982d4
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SHA512
a6d1a2b6363ad8a560567e6c11a48f8d1bc4cdfc36474902edf39f676440be82619aae52279121a776486d0edfe7a448f0fe9707b27ae760c1d6dd0201f6adc3
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SSDEEP
49152:BwpUwcTZ0rUinysyVZl5LCCcG3RTXM34FIIPWYJxuQfUgtFneJ8BG5U:Bw1ctUyjTLC8puaX/neJ8BgU
Score
10/10
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 8 IoCs
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Process spawned unexpected child process 24 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 16 IoCs
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Drops file in Program Files directory 9 IoCs
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Drops file in Windows directory 7 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 24 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 12 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\agentreviewPerf.exe"C:\Users\Admin\AppData\Local\Temp\agentreviewPerf.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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\AppReadiness\sysmon.exe"C:\Windows\AppReadiness\sysmon.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Portable Devices\winlogon.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\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 "winlogonw" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Portable Devices\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 "explorere" /sc MINUTE /mo 9 /tr "'C:\Windows\Registration\CRMLog\explorer.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\Registration\CRMLog\explorer.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 "explorere" /sc MINUTE /mo 14 /tr "'C:\Windows\Registration\CRMLog\explorer.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 "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows NT\Accessories\RuntimeBroker.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\RuntimeBroker.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 "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows NT\Accessories\RuntimeBroker.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'" /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 14 /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 "sysmons" /sc MINUTE /mo 12 /tr "'C:\Windows\AppReadiness\sysmon.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\AppReadiness\sysmon.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 "sysmons" /sc MINUTE /mo 9 /tr "'C:\Windows\AppReadiness\sysmon.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 "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\spoolsv.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Default User\spoolsv.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 "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\spoolsv.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 "sihosts" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\sihost.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\es-ES\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 "sihosts" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\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 "RegistryR" /sc MINUTE /mo 7 /tr "'C:\Program Files\Uninstall Information\Registry.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\Registry.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 "RegistryR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Uninstall Information\Registry.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
2.3MB
MD54e69fcf73418a08fcb8b3e7e2ecb43c4
SHA1a3ecd09f65ca4e7821a0b7f8596edcd679573f5b
SHA256fa78ac8f4c94923c7e53a3bf6936b46aff02f7746ee9518460c2d529ea2982d4
SHA512a6d1a2b6363ad8a560567e6c11a48f8d1bc4cdfc36474902edf39f676440be82619aae52279121a776486d0edfe7a448f0fe9707b27ae760c1d6dd0201f6adc3
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Filesize
72KB
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Filesize
344KB
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Filesize
344KB
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Filesize
8KB
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Filesize
88KB
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Filesize
320KB
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Filesize
72KB
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Filesize
5.2MB
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Filesize
56KB
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Filesize
32KB
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Filesize
32KB
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Filesize
112KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
2.3MB