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Analysis
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max time kernel
15s -
max time network
16s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
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submitted
13/01/2025, 19:47
General
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Target
891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476N.exe
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Size
783KB
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MD5
2dec334a3f065bc25c47a22de6a51b50
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SHA1
2d8ea87b76172f1b112445067a4109b9b5d23cc7
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SHA256
891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476
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SHA512
4264fa67d68d0f942128117e8883f7f8e2715fb65a3fbe550ae1b0e095d57cd79acf8437ede86bfe233d78f14ac200967671461555797356e37f4b0914626549
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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 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 3 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 6 IoCs
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Checks whether UAC is enabled 1 TTPs 2 IoCs
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Drops file in System32 directory 4 IoCs
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Drops file in Program Files directory 8 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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Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 10 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 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\891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476N.exe"C:\Users\Admin\AppData\Local\Temp\891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476N.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:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\lsm.exe"C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\lsm.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\lsm.exe'" /rl HIGHEST /f1⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\taskhost.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 "dwm" /sc ONLOGON /tr "'C:\Windows\Vss\Writers\Application\dwm.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 "sppsvc" /sc ONLOGON /tr "'C:\Users\Admin\Local Settings\sppsvc.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 "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\mpssvc\WmiPrvSE.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:\Program Files\Microsoft Games\Mahjong\ja-JP\winlogon.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
MD52dec334a3f065bc25c47a22de6a51b50
SHA12d8ea87b76172f1b112445067a4109b9b5d23cc7
SHA256891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476
SHA5124264fa67d68d0f942128117e8883f7f8e2715fb65a3fbe550ae1b0e095d57cd79acf8437ede86bfe233d78f14ac200967671461555797356e37f4b0914626549
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
40KB
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Filesize
48KB
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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
32KB
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Filesize
64KB
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Filesize
4KB
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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
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
808KB
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Filesize
9.9MB
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Filesize
808KB