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Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20241023-en -
resource tags
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submitted
28/10/2024, 08:18
General
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Target
ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.exe
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Size
783KB
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MD5
665d25b23b263b2654de48bfefeb68e0
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SHA1
fbe169375d8b8d4864cf924495f9c3559d0e86bf
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SHA256
ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2
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SHA512
1b3688f94a1e390b411b3224c1681d2cfdb63a7cf3277b8cb168a29c59c8af017526938a36b06b481dcf9317befef5d9e16a3c2aa9f572ce5189c04e89a718c2
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SSDEEP
12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:m+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 8 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 8 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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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 8 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 15 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\ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.exe"C:\Users\Admin\AppData\Local\Temp\ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.exe"1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\AzSqlExt\services.exe"C:\Windows\System32\AzSqlExt\services.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Documents and Settings\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 "csrss" /sc ONLOGON /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\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 "System" /sc ONLOGON /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\System.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 "ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2N.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 "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\C_1255\dllhost.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 "smss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\smss.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:\Windows\System32\AzSqlExt\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 "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\bdaplgin\sppsvc.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
MD5665d25b23b263b2654de48bfefeb68e0
SHA1fbe169375d8b8d4864cf924495f9c3559d0e86bf
SHA256ab18a7676dc9644e7ed41a2bc3ff1951da21d9a246493296d984b7aea82625e2
SHA5121b3688f94a1e390b411b3224c1681d2cfdb63a7cf3277b8cb168a29c59c8af017526938a36b06b481dcf9317befef5d9e16a3c2aa9f572ce5189c04e89a718c2
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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
64KB
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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
4KB
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Filesize
9.9MB
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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
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
808KB
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Filesize
9.9MB
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Filesize
808KB