Analysis

  • max time kernel
    228s
  • max time network
    211s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    27/11/2022, 13:44

General

  • Target

    dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe

  • Size

    1.5MB

  • MD5

    0f6e0c6f05c337592a113d9d86bfe774

  • SHA1

    989df4383d42ad26fe7de744157d93756f89f6cf

  • SHA256

    dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80

  • SHA512

    13d1d2ae655dcc7b8b6558ec842326749afa15275bed4b01fadcdb89eadd1d8779c11d421b425f6fb1bcdf210881912ce3af54b934e1c6171fba16bf5cd0cf4c

  • SSDEEP

    24576:atb20pkaCqT5TBWgNQ7aABEC6AbZKrzm5bFxz5q8gZNR8:HVg5tQ7aAd58zm5hN5q1ZL8

Malware Config

Extracted

Family

darkcomet

Botnet

By-02

C2

perimetronew.ddns.net:5588

Mutex

DC_MUTEX-58GZCKN

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    Rm9Mj5Grbvs3

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    JavaUpdate

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • AutoIT Executable 4 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe
    "C:\Users\Admin\AppData\Local\Temp\dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1324
    • C:\Users\Admin\AppData\Local\Temp\dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe
      "C:\Users\Admin\AppData\Local\Temp\dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1044
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1352
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80.exe" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:1556
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Deletes itself
        PID:896
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:792
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:1448
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1544
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          4⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Disables RegEdit via registry modification
          • Executes dropped EXE
          • Windows security modification
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:988
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:812

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

            Filesize

            1.5MB

            MD5

            0f6e0c6f05c337592a113d9d86bfe774

            SHA1

            989df4383d42ad26fe7de744157d93756f89f6cf

            SHA256

            dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80

            SHA512

            13d1d2ae655dcc7b8b6558ec842326749afa15275bed4b01fadcdb89eadd1d8779c11d421b425f6fb1bcdf210881912ce3af54b934e1c6171fba16bf5cd0cf4c

          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

            Filesize

            1.5MB

            MD5

            0f6e0c6f05c337592a113d9d86bfe774

            SHA1

            989df4383d42ad26fe7de744157d93756f89f6cf

            SHA256

            dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80

            SHA512

            13d1d2ae655dcc7b8b6558ec842326749afa15275bed4b01fadcdb89eadd1d8779c11d421b425f6fb1bcdf210881912ce3af54b934e1c6171fba16bf5cd0cf4c

          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

            Filesize

            1.5MB

            MD5

            0f6e0c6f05c337592a113d9d86bfe774

            SHA1

            989df4383d42ad26fe7de744157d93756f89f6cf

            SHA256

            dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80

            SHA512

            13d1d2ae655dcc7b8b6558ec842326749afa15275bed4b01fadcdb89eadd1d8779c11d421b425f6fb1bcdf210881912ce3af54b934e1c6171fba16bf5cd0cf4c

          • \Users\Admin\Documents\MSDCSC\msdcsc.exe

            Filesize

            1.5MB

            MD5

            0f6e0c6f05c337592a113d9d86bfe774

            SHA1

            989df4383d42ad26fe7de744157d93756f89f6cf

            SHA256

            dac995a764d23188fce47f1108c9a1c5d9e4dcabc53ade2aeaaba850d8348f80

            SHA512

            13d1d2ae655dcc7b8b6558ec842326749afa15275bed4b01fadcdb89eadd1d8779c11d421b425f6fb1bcdf210881912ce3af54b934e1c6171fba16bf5cd0cf4c

          • memory/988-76-0x0000000000130000-0x00000000001E4000-memory.dmp

            Filesize

            720KB

          • memory/988-85-0x0000000000130000-0x00000000001E4000-memory.dmp

            Filesize

            720KB

          • memory/988-84-0x0000000000130000-0x00000000001E4000-memory.dmp

            Filesize

            720KB

          • memory/988-81-0x0000000000130000-0x00000000001E4000-memory.dmp

            Filesize

            720KB

          • memory/988-79-0x0000000000130000-0x00000000001E4000-memory.dmp

            Filesize

            720KB

          • memory/1044-57-0x0000000000080000-0x0000000000134000-memory.dmp

            Filesize

            720KB

          • memory/1044-59-0x0000000000080000-0x0000000000134000-memory.dmp

            Filesize

            720KB

          • memory/1044-55-0x0000000000080000-0x0000000000134000-memory.dmp

            Filesize

            720KB

          • memory/1044-68-0x0000000000080000-0x0000000000134000-memory.dmp

            Filesize

            720KB

          • memory/1044-61-0x0000000000080000-0x0000000000134000-memory.dmp

            Filesize

            720KB

          • memory/1324-54-0x0000000076931000-0x0000000076933000-memory.dmp

            Filesize

            8KB