Analysis
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max time kernel
63s -
max time network
52s -
platform
windows7_x64 -
resource
win7-20241023-en -
resource tags
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submitted
25-01-2025 17:40
General
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Target
063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f.exe
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Size
952KB
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MD5
7146d0c354a5ffc4f39db58415c14022
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SHA1
2aa91a6ae46fd1fb956e6c8efda7251025b6a90e
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SHA256
063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f
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SHA512
b1b799f42e04443097b7f94ee4273377fcad228cfde8e1a0ffbc2e28427a8ebd4e804be0bdafc3e40122dee2a19ac2f4baccd054dbe90b5609b1c945f2719fcf
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SSDEEP
24576:u+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXL:p8/KfRTKZ
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 4 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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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 Windows 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 1 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 9 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\063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f.exe"C:\Users\Admin\AppData\Local\Temp\063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Windows directory
- 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\VVDSwyZL7t.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\SoftwareDistribution\Download\csrss.exe"C:\Windows\SoftwareDistribution\Download\csrss.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 "csrss" /sc ONLOGON /tr "'C:\Windows\System32\clusapi\csrss.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 "csrss" /sc ONLOGON /tr "'C:\Windows\System32\wer\csrss.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 "csrss" /sc ONLOGON /tr "'C:\Windows\SoftwareDistribution\Download\csrss.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 "063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f" /sc ONLOGON /tr "'C:\Users\Default User\063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f.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 "063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\RD2D18\063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f.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
MD57146d0c354a5ffc4f39db58415c14022
SHA12aa91a6ae46fd1fb956e6c8efda7251025b6a90e
SHA256063f0ebe162695ca595299a607634b1a4678527542053d73a85106d0de5f329f
SHA512b1b799f42e04443097b7f94ee4273377fcad228cfde8e1a0ffbc2e28427a8ebd4e804be0bdafc3e40122dee2a19ac2f4baccd054dbe90b5609b1c945f2719fcf
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Filesize
214B
MD578492672607da47bcbd5e207a9cb2d87
SHA147bd52302f83f15b088e1500c635c8487b09c672
SHA256a53cd0cac869b979519a5363a64fb55d29af669c334c0c355aa72b6e870948a3
SHA512829e795800586ede3246e23ceb84ca550669c601d1016557cefb67d21d2770c9b472e2b9309ac8242529fb83b10c89dfe7263bb83348f56c6545b43e1389a4d3
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Filesize
952KB
MD59164e12e0b5b2f2f87b9c48d30b7499d
SHA171f2775c225040e39f098d4208286a84b6f66d10
SHA2569bc84798a9bfc699136379f3d04efebb5f77b2b31ac09ed1ecff66bcde33c95e
SHA51252323c7372cb5a2b63a5f9a3b5205ef5e77b6a9e1bdb3e113b759a466fe70e2f4d6a1c8c9375a628365c753cd48f11c69cc5ce5aa04feed767260ed3399e2f9e
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Filesize
976KB
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Filesize
64KB
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Filesize
40KB
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Filesize
48KB
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Filesize
40KB
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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
4KB
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Filesize
64KB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
976KB