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Resubmissions

21/08/2024, 19:30

240821-x76q3sweqg 10

21/08/2024, 17:42

240821-v92h2avgpj 10

12/06/2024, 16:01

240612-tgps4a1bqh 10

Analysis

  • max time kernel
    118s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    21/08/2024, 19:30

General

  • Target

    0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe

  • Size

    9.4MB

  • MD5

    813b749967045532f86e6442447bcd8b

  • SHA1

    8d0615e7f7ba672a3fc94c05a9451f9d08797af7

  • SHA256

    0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464

  • SHA512

    47c16f403ab33ebb9e59c7c3a053dc29d0d654174d2be9153966ad9fc873e641f34ab44c7e38fb4c6fd376b384d4e1da0dacafb384e9abb1c7eb92cb32533877

  • SSDEEP

    24576:GYx7SFGwWG8/Ad5kybgeK8uQY2ZqR7NlaDbTxnVhv2MMLdGIhJ:IFFbK8q2ZhDbTNv2MuV

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • DCRat payload 6 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 15 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 19 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 6 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe
    "C:\Users\Admin\AppData\Local\Temp\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2280
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2060
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2956
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2988
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:804
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2160
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2660
    • C:\Users\Admin\AppData\Local\Temp\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe
      "C:\Users\Admin\AppData\Local\Temp\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2668
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\dllhost.exe'" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2584
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "smss" /sc ONLOGON /tr "'C:\ProgramData\Start Menu\smss.exe'" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3056
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Default\Application Data\dwm.exe'" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1188
      • C:\Users\Default\Application Data\dwm.exe
        "C:\Users\Default\Application Data\dwm.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1688
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1864
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:2736
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1448
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:1324
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2036
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:2748
        • C:\Users\Default\Application Data\dwm.exe
          "C:\Users\Default\Application Data\dwm.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:444
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1688 -s 536
          4⤵
          • Loads dropped DLL
          • Program crash
          PID:2884
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2280 -s 872
      2⤵
      • Program crash
      PID:2764

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Default\AppData\Roaming\dwm.exe

    Filesize

    9.4MB

    MD5

    813b749967045532f86e6442447bcd8b

    SHA1

    8d0615e7f7ba672a3fc94c05a9451f9d08797af7

    SHA256

    0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464

    SHA512

    47c16f403ab33ebb9e59c7c3a053dc29d0d654174d2be9153966ad9fc873e641f34ab44c7e38fb4c6fd376b384d4e1da0dacafb384e9abb1c7eb92cb32533877

  • memory/444-45-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1688-33-0x00000000010D0000-0x0000000001A2C000-memory.dmp

    Filesize

    9.4MB

  • memory/2280-18-0x000000007499E000-0x000000007499F000-memory.dmp

    Filesize

    4KB

  • memory/2280-1-0x0000000001040000-0x000000000199C000-memory.dmp

    Filesize

    9.4MB

  • memory/2280-2-0x0000000005210000-0x0000000005356000-memory.dmp

    Filesize

    1.3MB

  • memory/2280-3-0x0000000074990000-0x000000007507E000-memory.dmp

    Filesize

    6.9MB

  • memory/2280-19-0x0000000074990000-0x000000007507E000-memory.dmp

    Filesize

    6.9MB

  • memory/2280-0-0x000000007499E000-0x000000007499F000-memory.dmp

    Filesize

    4KB

  • memory/2668-12-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-15-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-17-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-16-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2668-10-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-4-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-6-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB

  • memory/2668-8-0x0000000000400000-0x0000000000538000-memory.dmp

    Filesize

    1.2MB