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Analysis

  • max time kernel
    189s
  • max time network
    28s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    01/11/2023, 14:14

General

  • Target

    NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe

  • Size

    325KB

  • MD5

    8b48a1b5a19cb1e67f43c81386fa26d0

  • SHA1

    bb8d38a056d805d0f10fbdbe810f968ff3b9d184

  • SHA256

    39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

  • SHA512

    361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

  • SSDEEP

    6144:ZYgZdcJZs091uPFP1QpCT0LurJH1l3ZwzaKAG6cz9eswTfmr/yruO:ZY1JKIMlypCgiFJxlcz9eswT0hO

Malware Config

Extracted

Family

darkcomet

Botnet

WXXXXW

C2

euro2012.no-ip.org:22

euro2012.no-ip.org:3389

euro2012.no-ip.org:5631

Mutex

DC_MUTEX-X2H0E82

Attributes
  • InstallPath

    Debug\msdcsc.exe

  • gencode

    F4JVWk9c0ekU

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe"
    1⤵
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2640
    • C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe
      "C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe"
      2⤵
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe
        "C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1912
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1352
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp\NEAS.8b48a1b5a19cb1e67f43c81386fa26d0.exe" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:2824
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:880
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:1964
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • Deletes itself
          PID:660
        • C:\Users\Admin\Documents\Debug\msdcsc.exe
          "C:\Users\Admin\Documents\Debug\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1992
          • C:\Users\Admin\Documents\Debug\msdcsc.exe
            "C:\Users\Admin\Documents\Debug\msdcsc.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2356
            • C:\Users\Admin\Documents\Debug\msdcsc.exe
              "C:\Users\Admin\Documents\Debug\msdcsc.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2192
              • C:\Windows\SysWOW64\notepad.exe
                notepad
                7⤵
                  PID:2724

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      325KB

      MD5

      8b48a1b5a19cb1e67f43c81386fa26d0

      SHA1

      bb8d38a056d805d0f10fbdbe810f968ff3b9d184

      SHA256

      39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

      SHA512

      361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

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

      Filesize

      325KB

      MD5

      8b48a1b5a19cb1e67f43c81386fa26d0

      SHA1

      bb8d38a056d805d0f10fbdbe810f968ff3b9d184

      SHA256

      39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

      SHA512

      361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

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

      Filesize

      325KB

      MD5

      8b48a1b5a19cb1e67f43c81386fa26d0

      SHA1

      bb8d38a056d805d0f10fbdbe810f968ff3b9d184

      SHA256

      39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

      SHA512

      361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

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

      Filesize

      325KB

      MD5

      8b48a1b5a19cb1e67f43c81386fa26d0

      SHA1

      bb8d38a056d805d0f10fbdbe810f968ff3b9d184

      SHA256

      39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

      SHA512

      361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

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

      Filesize

      325KB

      MD5

      8b48a1b5a19cb1e67f43c81386fa26d0

      SHA1

      bb8d38a056d805d0f10fbdbe810f968ff3b9d184

      SHA256

      39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

      SHA512

      361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

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

      Filesize

      325KB

      MD5

      8b48a1b5a19cb1e67f43c81386fa26d0

      SHA1

      bb8d38a056d805d0f10fbdbe810f968ff3b9d184

      SHA256

      39b902c7f2684b5faf01bb3872ddd4fd4066f15553e6b009a9be0fef85928b2c

      SHA512

      361cac8ab1d20df90dd498c6cee0f0b0a8a1716b88a0ce437c48defe16c48e416bb3a4e75e97d659fe06d10c26d5dbc0b08a1146283265e8c1da6c744883c2e7

    • memory/660-543-0x0000000000280000-0x0000000000281000-memory.dmp

      Filesize

      4KB

    • memory/1912-557-0x0000000000290000-0x0000000000291000-memory.dmp

      Filesize

      4KB

    • memory/1912-517-0x0000000000290000-0x0000000000291000-memory.dmp

      Filesize

      4KB

    • memory/1912-516-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/1912-511-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/1912-548-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/1912-550-0x0000000003C10000-0x0000000003C76000-memory.dmp

      Filesize

      408KB

    • memory/1992-551-0x0000000000400000-0x0000000000466000-memory.dmp

      Filesize

      408KB

    • memory/2192-1079-0x00000000003D0000-0x00000000003D1000-memory.dmp

      Filesize

      4KB

    • memory/2192-1077-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/2192-1072-0x00000000003D0000-0x00000000003D1000-memory.dmp

      Filesize

      4KB

    • memory/2192-1070-0x0000000000400000-0x00000000004B7000-memory.dmp

      Filesize

      732KB

    • memory/2356-556-0x0000000000400000-0x000000000044B000-memory.dmp

      Filesize

      300KB

    • memory/2356-1069-0x0000000000400000-0x000000000044B000-memory.dmp

      Filesize

      300KB

    • memory/2640-1-0x0000000000400000-0x0000000000466000-memory.dmp

      Filesize

      408KB

    • memory/2640-3-0x0000000000280000-0x00000000002CB000-memory.dmp

      Filesize

      300KB

    • memory/2640-0-0x0000000000400000-0x0000000000466000-memory.dmp

      Filesize

      408KB

    • memory/2760-4-0x0000000000400000-0x000000000044B000-memory.dmp

      Filesize

      300KB

    • memory/2760-5-0x0000000000400000-0x000000000044B000-memory.dmp

      Filesize

      300KB

    • memory/2760-513-0x0000000000450000-0x00000000004B6000-memory.dmp

      Filesize

      408KB