Analysis

  • max time kernel
    187s
  • max time network
    57s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 15:46

General

  • Target

    4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877.exe

  • Size

    362KB

  • MD5

    d0e689cd46215ce61aa7cad5184f0c03

  • SHA1

    993595b19cb80eec19c920c4798980ceac840472

  • SHA256

    4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877

  • SHA512

    c5116206fe39c828b12d7c9edc386a8f960ffc1f02c6af552b77f466e299d28c38a2e562d47937feb4e3d9bd2f9e6df4f5b63bcc1104777c3ada3a52df18f789

  • SSDEEP

    6144:4cNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37lK2:4cW7KEZlPzCy37lb

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

paullad14.no-ip.biz:1604

Mutex

DC_MUTEX-3TP2MMM

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    xhjk8rhgncrY

  • 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
  • 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 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • UPX packed file 8 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • 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). Likely ransomware behaviour.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877.exe
    "C:\Users\Admin\AppData\Local\Temp\4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1148
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:684
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:620
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1084
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • 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 behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1920
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
          PID:540
        • C:\Windows\explorer.exe
          "C:\Windows\explorer.exe"
          3⤵
            PID:1364
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            3⤵
              PID:1584

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          362KB

          MD5

          d0e689cd46215ce61aa7cad5184f0c03

          SHA1

          993595b19cb80eec19c920c4798980ceac840472

          SHA256

          4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877

          SHA512

          c5116206fe39c828b12d7c9edc386a8f960ffc1f02c6af552b77f466e299d28c38a2e562d47937feb4e3d9bd2f9e6df4f5b63bcc1104777c3ada3a52df18f789

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

          Filesize

          362KB

          MD5

          d0e689cd46215ce61aa7cad5184f0c03

          SHA1

          993595b19cb80eec19c920c4798980ceac840472

          SHA256

          4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877

          SHA512

          c5116206fe39c828b12d7c9edc386a8f960ffc1f02c6af552b77f466e299d28c38a2e562d47937feb4e3d9bd2f9e6df4f5b63bcc1104777c3ada3a52df18f789

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

          Filesize

          362KB

          MD5

          d0e689cd46215ce61aa7cad5184f0c03

          SHA1

          993595b19cb80eec19c920c4798980ceac840472

          SHA256

          4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877

          SHA512

          c5116206fe39c828b12d7c9edc386a8f960ffc1f02c6af552b77f466e299d28c38a2e562d47937feb4e3d9bd2f9e6df4f5b63bcc1104777c3ada3a52df18f789

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

          Filesize

          362KB

          MD5

          d0e689cd46215ce61aa7cad5184f0c03

          SHA1

          993595b19cb80eec19c920c4798980ceac840472

          SHA256

          4b0e0b0add966a824365a62ae8c72e2bf6517a7bd5f1197cf0fca07c09ab6877

          SHA512

          c5116206fe39c828b12d7c9edc386a8f960ffc1f02c6af552b77f466e299d28c38a2e562d47937feb4e3d9bd2f9e6df4f5b63bcc1104777c3ada3a52df18f789

        • memory/620-57-0x0000000000000000-mapping.dmp

        • memory/684-58-0x0000000000000000-mapping.dmp

        • memory/1084-59-0x0000000000000000-mapping.dmp

        • memory/1148-56-0x0000000000000000-mapping.dmp

        • memory/1584-67-0x0000000000000000-mapping.dmp

        • memory/1920-62-0x0000000000000000-mapping.dmp

        • memory/1920-68-0x0000000000400000-0x00000000004EB000-memory.dmp

          Filesize

          940KB

        • memory/1920-71-0x0000000000400000-0x00000000004EB000-memory.dmp

          Filesize

          940KB

        • memory/2024-54-0x0000000075B11000-0x0000000075B13000-memory.dmp

          Filesize

          8KB

        • memory/2024-55-0x0000000000400000-0x00000000004EB000-memory.dmp

          Filesize

          940KB

        • memory/2024-66-0x0000000003B60000-0x0000000003C4B000-memory.dmp

          Filesize

          940KB

        • memory/2024-70-0x0000000000400000-0x00000000004EB000-memory.dmp

          Filesize

          940KB