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Analysis
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max time kernel
90s -
max time network
21s -
platform
windows7_x64 -
resource
win7-20240729-en -
resource tags
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submitted
22/11/2024, 11:29
General
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Target
8437c6899352c57f314716d1c297418831b42ff83833669e4aed0192a5edca88.exe
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Size
952KB
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MD5
41ccbb9f4e1b3b8acbe42f57842a6ab9
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SHA1
777288aa34f632b9279a0ef0ef571ed8c32f6ede
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SHA256
8437c6899352c57f314716d1c297418831b42ff83833669e4aed0192a5edca88
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SHA512
b1030ff32bea991d7d1ce92fb6eebdeefb2637cc808becc73ff511112c8079cc7228891ab217d51953b22b768c339eaafe6052a6ba1b3b74fb78c6997d8c27e9
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SSDEEP
24576:W+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXe:x8/KfRTKQ
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 5 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 Program Files directory 10 IoCs
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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 3 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\8437c6899352c57f314716d1c297418831b42ff83833669e4aed0192a5edca88.exe"C:\Users\Admin\AppData\Local\Temp\8437c6899352c57f314716d1c297418831b42ff83833669e4aed0192a5edca88.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Program Files (x86)\Windows Photo Viewer\fr-FR\audiodg.exe"C:\Program Files (x86)\Windows Photo Viewer\fr-FR\audiodg.exe"2⤵
- 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 "audiodg" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\fr-FR\audiodg.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 "lsass" /sc ONLOGON /tr "'C:\ProgramData\Documents\lsass.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 "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\lsm.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 "explorer" /sc ONLOGON /tr "'C:\PerfLogs\Admin\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 "OSPPSVC" /sc ONLOGON /tr "'C:\Recovery\3a99bb82-4e15-11ef-8354-cae67966b5f6\OSPPSVC.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
MD541ccbb9f4e1b3b8acbe42f57842a6ab9
SHA1777288aa34f632b9279a0ef0ef571ed8c32f6ede
SHA2568437c6899352c57f314716d1c297418831b42ff83833669e4aed0192a5edca88
SHA512b1030ff32bea991d7d1ce92fb6eebdeefb2637cc808becc73ff511112c8079cc7228891ab217d51953b22b768c339eaafe6052a6ba1b3b74fb78c6997d8c27e9
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Filesize
952KB
MD58a13538db71d4f5ca22acd4c67bfa273
SHA1560155934eeecb51d73406e4c503399e9e797658
SHA256359d1e19cd592dbe371178dc13f951c36ab20635308781f85aa5d9a3825283ef
SHA5125c522d33738eeb616df33050ed3fad7f692e2fe818f339a48127f13307d1baa7b90e06fe7332743c7cdb28f3e829481f5d6104057de5c8967bcfd7688eba8462
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Filesize
952KB
MD5b267daae410d295921f6b417278c3f7c
SHA1afad6dd15f4da35ba87870fd6734f426dec7fe6e
SHA2563bb9730d3dc4dfcb377831df9302625ef9a00dbcbf961ddbe36eb3cd45dc7294
SHA51253ae9a712f3d1001ea91440ff82413a0b1d2d2df4b52d8a987bb3e491bfb3af8358fa6fa1f561dca7c6b87d3ada6aa425be5d26cdd18b21fa8ac860349a6ae7a
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Filesize
976KB
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Filesize
64KB
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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
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