Analysis
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max time kernel
80s -
max time network
16s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
22-01-2025 22:39
General
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Target
3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4N.exe
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Size
783KB
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MD5
b8d3a762bae9978720cf91014a5a84b0
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SHA1
034a5a6146c211782ae20b57095fa2ae87e5127b
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SHA256
3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4
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SHA512
3f5dff93777057eff4c08d13319f5d46583c8968a18abd495b2e9569dbcbaf20d20bb01785407c2e760dabeecb992733c137b375702360586345b5370fdf427e
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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 4 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 4 IoCs
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Checks whether UAC is enabled 1 TTPs 2 IoCs
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Drops file in System32 directory 8 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 4 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\3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4N.exe"C:\Users\Admin\AppData\Local\Temp\3bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4N.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:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\WmiPrvSE.exe"C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\WmiPrvSE.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\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 "sppsvc" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\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\MMFUtil\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 "smss" /sc ONLOGON /tr "'C:\Windows\System32\SysFxUI\smss.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
MD5b8d3a762bae9978720cf91014a5a84b0
SHA1034a5a6146c211782ae20b57095fa2ae87e5127b
SHA2563bfe01358c790e1a5d4675c22b0bb0817214e4ec23cdcd919a635ada0a92c9f4
SHA5123f5dff93777057eff4c08d13319f5d46583c8968a18abd495b2e9569dbcbaf20d20bb01785407c2e760dabeecb992733c137b375702360586345b5370fdf427e
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Filesize
808KB
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Filesize
32KB
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Filesize
9.9MB
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Filesize
4KB
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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
64KB
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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
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
9.9MB
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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
32KB