Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
28-11-2024 18:06
General
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Target
79fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39N.exe
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Size
783KB
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MD5
75bf70525a5c41bbb7d1d85c16e49350
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SHA1
02f52ebc09ca1252da8c0f4eca1012a45f1ca3de
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SHA256
79fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39
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SHA512
41a53d3d7942fffbe80c2d5f666257ad34f5d5595780364c3ff033793d6c08428d5b90755d1366e16ecc1d2a3e0c88a10dc582e11c922317080555dce890bffa
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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 7 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 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 7 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 16 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 system certificate store 2 TTPs 2 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 23 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 9 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\79fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39N.exe"C:\Users\Admin\AppData\Local\Temp\79fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39N.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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\AOLsz5CLtX.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:23⤵
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C:\Recovery\1f4ba082-69f6-11ef-a143-62cb582c238c\Idle.exe"C:\Recovery\1f4ba082-69f6-11ef-a143-62cb582c238c\Idle.exe"3⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\1f4ba082-69f6-11ef-a143-62cb582c238c\Idle.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\sdhcinst\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 "lsass" /sc ONLOGON /tr "'C:\Windows\System32\WcnEapAuthProxy\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 "79fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39N" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\SetupExe(20240903051910928)\79fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39N.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:\Program Files\Microsoft Office\Office14\1033\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 "taskhost" /sc ONLOGON /tr "'C:\Windows\System32\icm32\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 "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\bootres\spoolsv.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
MD575bf70525a5c41bbb7d1d85c16e49350
SHA102f52ebc09ca1252da8c0f4eca1012a45f1ca3de
SHA25679fa285ef5f374a753e3134ea1c6861eabc45eb5ef593ba31ff817f3097ebe39
SHA51241a53d3d7942fffbe80c2d5f666257ad34f5d5595780364c3ff033793d6c08428d5b90755d1366e16ecc1d2a3e0c88a10dc582e11c922317080555dce890bffa
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Filesize
221B
MD52a1ae4f768dbb52c899b552c91c09926
SHA1d1384cb7eba43521441dcb7d85f500d6ed13ab9a
SHA25641a0242c37a7b532089b302859f1425c57b9b124029cd93b0c90fa7b8509ab5c
SHA512b48350a4c152c3d38526a33087a16f760549582dc14cab4b87e3f9b3efa40833e47f2e9fef16f50c62221f408fcd5d8b23ffc180ce9c19332cf7a187a9ac0aeb
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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
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
4KB
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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
32KB
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Filesize
32KB
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Filesize
48KB
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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
808KB
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Filesize
9.9MB
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Filesize
808KB