Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 15:31

General

  • Target

    654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db.exe

  • Size

    472KB

  • MD5

    42a9bd3b85b9e3e8f3e1e8ad98694c5e

  • SHA1

    3226db0689459f6c95dd8fcb6618304da3afc100

  • SHA256

    654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

  • SHA512

    242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

  • SSDEEP

    12288:cAtSB52EATN4yUKScEuqeKY5Ty1Evt58Ca:ceS2N/CqY1Evt58C

Malware Config

Extracted

Family

darkcomet

Botnet

WorkHard20

C2

notice.noip.me:1290

Mutex

DC_MUTEX-LZ0MH5B

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    iByLpcNEt7H4

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    Microsoft Update

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 7 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db.exe
    "C:\Users\Admin\AppData\Local\Temp\654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1788
    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe
      "C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:952
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1528
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1888
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
            5⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:652
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1076
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
            5⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:1180
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          PID:268
      • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe
        "C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe" -proc 1528 C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1060
        • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe
          "C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1456
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
            "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
            5⤵
            • Adds Run key to start application
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1664
            • C:\Windows\SysWOW64\notepad.exe
              notepad
              6⤵
                PID:1332
            • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe
              "C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe" -proc 1664 C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1680

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

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

      Filesize

      1.1MB

      MD5

      34aa912defa18c2c129f1e09d75c1d7e

      SHA1

      9c3046324657505a30ecd9b1fdb46c05bde7d470

      SHA256

      6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

      SHA512

      d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

      Filesize

      1.1MB

      MD5

      34aa912defa18c2c129f1e09d75c1d7e

      SHA1

      9c3046324657505a30ecd9b1fdb46c05bde7d470

      SHA256

      6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

      SHA512

      d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

    • \??\PIPE\srvsvc

      MD5

      d41d8cd98f00b204e9800998ecf8427e

      SHA1

      da39a3ee5e6b4b0d3255bfef95601890afd80709

      SHA256

      e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

      SHA512

      cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

    • \Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • \Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • \Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • \Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • \Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

    • \Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe

      Filesize

      472KB

      MD5

      42a9bd3b85b9e3e8f3e1e8ad98694c5e

      SHA1

      3226db0689459f6c95dd8fcb6618304da3afc100

      SHA256

      654dfcbe3130819dbe5bc66bc77417eccf506845d89b90e79db68416116675db

      SHA512

      242b2d3f47de461835a85881306ca5c346fb567057b38888627e776abed2ca2b6769becbd3459e6750894016ba6979244ab0b77ae39571350f51db692b11064c

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

      Filesize

      1.1MB

      MD5

      34aa912defa18c2c129f1e09d75c1d7e

      SHA1

      9c3046324657505a30ecd9b1fdb46c05bde7d470

      SHA256

      6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

      SHA512

      d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

    • memory/268-105-0x0000000000000000-mapping.dmp

    • memory/652-101-0x0000000000000000-mapping.dmp

    • memory/952-90-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/952-100-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/952-58-0x0000000000000000-mapping.dmp

    • memory/1060-112-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1060-106-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1060-94-0x0000000000000000-mapping.dmp

    • memory/1076-99-0x0000000000000000-mapping.dmp

    • memory/1180-102-0x0000000000000000-mapping.dmp

    • memory/1332-144-0x0000000000000000-mapping.dmp

    • memory/1456-110-0x0000000000000000-mapping.dmp

    • memory/1456-151-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1456-114-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1528-66-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-63-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-85-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-82-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-79-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-76-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-72-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-69-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-103-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-87-0x000000000048F888-mapping.dmp

    • memory/1528-88-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-64-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1528-91-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1664-142-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1664-139-0x000000000048F888-mapping.dmp

    • memory/1664-153-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1664-155-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1680-147-0x0000000000000000-mapping.dmp

    • memory/1680-152-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1680-154-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1788-54-0x00000000761F1000-0x00000000761F3000-memory.dmp

      Filesize

      8KB

    • memory/1788-62-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1788-55-0x00000000748F0000-0x0000000074E9B000-memory.dmp

      Filesize

      5.7MB

    • memory/1888-98-0x0000000000000000-mapping.dmp