Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
22-12-2024 20:56
General
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Target
27e7c3c983148345bd6694b972325c8af83587f9c414c891fad275697d714cb4.exe
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Size
783KB
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MD5
98847426d37f95205ac38af1a2dffcb4
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SHA1
c859a5aa720b06186316cc5c42b4be0b34b4599b
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SHA256
27e7c3c983148345bd6694b972325c8af83587f9c414c891fad275697d714cb4
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SHA512
b021f71904752c4cebcfc61530fe69dd720a38991a750f718d4b473890c560e7e5aca125df93d04336e8e1979eaa608162c87ce86e103f465f36e0571ce81875
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q
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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Process spawned unexpected child process 7 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 7 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 8 IoCs
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Drops file in Program Files directory 4 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 system certificate store 2 TTPs 2 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 21 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\27e7c3c983148345bd6694b972325c8af83587f9c414c891fad275697d714cb4.exe"C:\Users\Admin\AppData\Local\Temp\27e7c3c983148345bd6694b972325c8af83587f9c414c891fad275697d714cb4.exe"1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Program Files 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\73FDxf5OiE.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\PFRO\explorer.exe"C:\Windows\PFRO\explorer.exe"3⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\PFRO\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 "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\VSSVC\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 "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\msdmo\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 "OSPPSVC" /sc ONLOGON /tr "'C:\ProgramData\Start Menu\OSPPSVC.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 "services" /sc ONLOGON /tr "'C:\ProgramData\Start Menu\services.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 "services" /sc ONLOGON /tr "'C:\PerfLogs\Admin\services.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 "System" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\System.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
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
783KB
MD598847426d37f95205ac38af1a2dffcb4
SHA1c859a5aa720b06186316cc5c42b4be0b34b4599b
SHA25627e7c3c983148345bd6694b972325c8af83587f9c414c891fad275697d714cb4
SHA512b021f71904752c4cebcfc61530fe69dd720a38991a750f718d4b473890c560e7e5aca125df93d04336e8e1979eaa608162c87ce86e103f465f36e0571ce81875
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Filesize
192B
MD52ff4aef44e0e37e997f44966572fd779
SHA1a9268e857c6de2ab7a46557889dfb071d202984d
SHA2568f8ccc013487bfb43e96f60210f812fab202e98c0dd1f68a95e26d60d0f945b6
SHA5125ed2bef0fbb3f54822b9cba2fc7e4fedb6acf0c72230a4fc247365894a9d633cbeb885cbabdeedc1a6f3cd4b6b24cac51730c938421e2955fbf0e6685d4a7dec
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Filesize
783KB
MD57ba753e41f7a0f174e5ee7c01b2234ca
SHA14a72ba12cf6983a8cb7d8257da274962e1c39046
SHA2567893073a217fe7704c61e458272ef6369068e490b467efb439ae1620bbe74049
SHA51205542dad252ae8838dfcc923bdf883aa52ecba4cc0871612c101ec15053b6d1af1fa1a293d188e8a5946dd6273a2d6b5f8565b029c87da98bb89148c265e1d7c
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
48KB
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Filesize
40KB
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Filesize
40KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
4KB
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
48KB
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Filesize
32KB
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Filesize
9.9MB
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Filesize
32KB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
808KB
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Filesize
808KB