Analysis
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max time kernel
104s -
max time network
105s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
03-11-2024 08:58
General
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Target
6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
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Size
784KB
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MD5
de823afda19d28d9868a69153f623070
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SHA1
9dc57b5bfd50f833432646b5a482e31801297b44
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SHA256
6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fd
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SHA512
10b5ced20ffb9082e211245eaf4a002dfab0faf5106f449719529f345be1f2b25a538cd61636d09d6b6326be575cc45c78a8a7c33a3c864f2c376e0996cf71c4
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SSDEEP
12288:eqnO8YpD1oOJp+Ce1PSiG2jfIBoI5DyDwYMDxFesH0ioBw7oKk2:e+ORToOWSi5gBoS4wYUJ0eo2
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 5 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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UAC bypass 3 TTPs 3 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 5 IoCs
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Checks whether UAC is enabled 1 TTPs 2 IoCs
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Drops file in System32 directory 12 IoCs
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Drops file in Program Files 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 registry class 1 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 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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System policy modification 1 TTPs 3 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\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe"C:\Users\Admin\AppData\Local\Temp\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe"1⤵
- UAC bypass
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Program Files\Common Files\microsoft shared\ClickToRun\FrequentOfficeUpdateSchedule\OfficeClickToRun.exe"C:\Program Files\Common Files\microsoft shared\ClickToRun\FrequentOfficeUpdateSchedule\OfficeClickToRun.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\FrequentOfficeUpdateSchedule\OfficeClickToRun.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 "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\SysWOW64\setup\en-US\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 "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\devmgr\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 "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\ProgramData\ssh\StartMenuExperienceHost.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 "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\ComputerToastIcon\backgroundTaskHost.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
784KB
MD5de823afda19d28d9868a69153f623070
SHA19dc57b5bfd50f833432646b5a482e31801297b44
SHA2566932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fd
SHA51210b5ced20ffb9082e211245eaf4a002dfab0faf5106f449719529f345be1f2b25a538cd61636d09d6b6326be575cc45c78a8a7c33a3c864f2c376e0996cf71c4
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Filesize
32KB
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Filesize
808KB
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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
48KB
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Filesize
40KB
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Filesize
32KB
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Filesize
40KB
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Filesize
32KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
10.8MB
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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
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
10.8MB
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Filesize
32KB