Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    25-07-2022 00:14

General

  • Target

    b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415.exe

  • Size

    658KB

  • MD5

    012c913e751ab367e15764c21caeda17

  • SHA1

    2ed45638dd8b9730be7e1e128aad0fd89fe423e2

  • SHA256

    b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415

  • SHA512

    9a3a8136fcf6d9e30c8d7cc97d1fbe5bbfe4326cc1891232027348666fb89b81c218638e42ded7df294e84a3b85b423c6ee51138d55c89d284d8f3792bc0a514

Malware Config

Extracted

Family

darkcomet

Botnet

Hello

C2

wbbebe.ddns.net:1604

Mutex

DC_MUTEX-LMU8FMS

Attributes
  • InstallPath

    MSDCSC\svchost.exe

  • gencode

    puGMcKAsuLmD

  • 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 6 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs 4 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 1 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 1 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 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415.exe
    "C:\Users\Admin\AppData\Local\Temp\b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:832
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1644
    • C:\Windows\SysWOW64\MSDCSC\svchost.exe
      "C:\Windows\system32\MSDCSC\svchost.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 use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1340
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies firewall policy service
        • Modifies security service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • Adds Run key to start application
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:972
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
            PID:908

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Modify Existing Service

    2
    T1031

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    7
    T1112

    Disabling Security Tools

    2
    T1089

    Hidden Files and Directories

    2
    T1158

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Windows\SysWOW64\MSDCSC\svchost.exe
      Filesize

      658KB

      MD5

      012c913e751ab367e15764c21caeda17

      SHA1

      2ed45638dd8b9730be7e1e128aad0fd89fe423e2

      SHA256

      b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415

      SHA512

      9a3a8136fcf6d9e30c8d7cc97d1fbe5bbfe4326cc1891232027348666fb89b81c218638e42ded7df294e84a3b85b423c6ee51138d55c89d284d8f3792bc0a514

    • C:\Windows\SysWOW64\MSDCSC\svchost.exe
      Filesize

      658KB

      MD5

      012c913e751ab367e15764c21caeda17

      SHA1

      2ed45638dd8b9730be7e1e128aad0fd89fe423e2

      SHA256

      b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415

      SHA512

      9a3a8136fcf6d9e30c8d7cc97d1fbe5bbfe4326cc1891232027348666fb89b81c218638e42ded7df294e84a3b85b423c6ee51138d55c89d284d8f3792bc0a514

    • \Windows\SysWOW64\MSDCSC\svchost.exe
      Filesize

      658KB

      MD5

      012c913e751ab367e15764c21caeda17

      SHA1

      2ed45638dd8b9730be7e1e128aad0fd89fe423e2

      SHA256

      b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415

      SHA512

      9a3a8136fcf6d9e30c8d7cc97d1fbe5bbfe4326cc1891232027348666fb89b81c218638e42ded7df294e84a3b85b423c6ee51138d55c89d284d8f3792bc0a514

    • \Windows\SysWOW64\MSDCSC\svchost.exe
      Filesize

      658KB

      MD5

      012c913e751ab367e15764c21caeda17

      SHA1

      2ed45638dd8b9730be7e1e128aad0fd89fe423e2

      SHA256

      b22b2d1e592b4a7af634805a398222af210b9e3a35b6e2d90ae7ba53cda7d415

      SHA512

      9a3a8136fcf6d9e30c8d7cc97d1fbe5bbfe4326cc1891232027348666fb89b81c218638e42ded7df294e84a3b85b423c6ee51138d55c89d284d8f3792bc0a514

    • memory/832-55-0x0000000000000000-mapping.dmp
    • memory/908-63-0x0000000000000000-mapping.dmp
    • memory/1340-59-0x0000000000000000-mapping.dmp
    • memory/1644-56-0x0000000000000000-mapping.dmp
    • memory/2020-54-0x0000000076771000-0x0000000076773000-memory.dmp
      Filesize

      8KB