Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    02-10-2022 12:15

General

  • Target

    ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63.exe

  • Size

    693KB

  • MD5

    6de7cd0ab88ab2804c3406df023bb3a0

  • SHA1

    edf82e682f3eed25b22755ae52226131d9ccaf66

  • SHA256

    ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63

  • SHA512

    2ac5d42ed2ba3282881e2df8afc59043793baad6499eea5fc7dc3ce4e650e986d8833a7eee541b29c74794edaff7ce1ae4630be6c95303687f5714055d0d5368

  • SSDEEP

    12288:BZ8nw7Aaw+qphbSZmoTeBrp8pLKHxA/qnGIVuett6C63qGWKPMto3bybWBTBn/r:BZ8wEaL0oyBVSgJnGIVjGWFKbvn/r

Malware Config

Extracted

Family

darkcomet

Botnet

HackEd

C2

net0.noip.me:1604

Mutex

DC_MUTEX-TEWLSPF

Attributes
  • InstallPath

    Microsoft\windows\explorer.exe

  • gencode

    J5KZ635fLizV

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    Microsoft Windows

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Executes dropped EXE 1 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 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 61 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63.exe
    "C:\Users\Admin\AppData\Local\Temp\ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:616
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1736
    • 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:1516
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1104
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      PID:1020
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\Microsoft\windows\explorer.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\Microsoft\windows\explorer.exe"
      2⤵
      • 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:1700
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:1640

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Modify Existing Service

    1
    T1031

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    6
    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:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\Microsoft\windows\explorer.exe
      Filesize

      693KB

      MD5

      6de7cd0ab88ab2804c3406df023bb3a0

      SHA1

      edf82e682f3eed25b22755ae52226131d9ccaf66

      SHA256

      ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63

      SHA512

      2ac5d42ed2ba3282881e2df8afc59043793baad6499eea5fc7dc3ce4e650e986d8833a7eee541b29c74794edaff7ce1ae4630be6c95303687f5714055d0d5368

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\Microsoft\windows\explorer.exe
      Filesize

      693KB

      MD5

      6de7cd0ab88ab2804c3406df023bb3a0

      SHA1

      edf82e682f3eed25b22755ae52226131d9ccaf66

      SHA256

      ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63

      SHA512

      2ac5d42ed2ba3282881e2df8afc59043793baad6499eea5fc7dc3ce4e650e986d8833a7eee541b29c74794edaff7ce1ae4630be6c95303687f5714055d0d5368

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\Microsoft\windows\explorer.exe
      Filesize

      693KB

      MD5

      6de7cd0ab88ab2804c3406df023bb3a0

      SHA1

      edf82e682f3eed25b22755ae52226131d9ccaf66

      SHA256

      ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63

      SHA512

      2ac5d42ed2ba3282881e2df8afc59043793baad6499eea5fc7dc3ce4e650e986d8833a7eee541b29c74794edaff7ce1ae4630be6c95303687f5714055d0d5368

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\Microsoft\windows\explorer.exe
      Filesize

      693KB

      MD5

      6de7cd0ab88ab2804c3406df023bb3a0

      SHA1

      edf82e682f3eed25b22755ae52226131d9ccaf66

      SHA256

      ccc9396f0e4b7501d5a1e964ed76ce38cb933447ad1836956ecb56460cab9d63

      SHA512

      2ac5d42ed2ba3282881e2df8afc59043793baad6499eea5fc7dc3ce4e650e986d8833a7eee541b29c74794edaff7ce1ae4630be6c95303687f5714055d0d5368

    • memory/616-55-0x0000000000000000-mapping.dmp
    • memory/1020-57-0x0000000000000000-mapping.dmp
    • memory/1104-59-0x0000000000000000-mapping.dmp
    • memory/1328-54-0x0000000075FE1000-0x0000000075FE3000-memory.dmp
      Filesize

      8KB

    • memory/1328-67-0x0000000003C40000-0x0000000003DB9000-memory.dmp
      Filesize

      1.5MB

    • memory/1328-65-0x0000000000400000-0x0000000000579000-memory.dmp
      Filesize

      1.5MB

    • memory/1516-56-0x0000000000000000-mapping.dmp
    • memory/1640-69-0x0000000000000000-mapping.dmp
    • memory/1700-63-0x0000000000000000-mapping.dmp
    • memory/1700-70-0x0000000000400000-0x0000000000579000-memory.dmp
      Filesize

      1.5MB

    • memory/1700-72-0x0000000000400000-0x0000000000579000-memory.dmp
      Filesize

      1.5MB

    • memory/1700-73-0x0000000000400000-0x0000000000579000-memory.dmp
      Filesize

      1.5MB

    • memory/1700-74-0x0000000000400000-0x0000000000579000-memory.dmp
      Filesize

      1.5MB

    • memory/1736-60-0x0000000000000000-mapping.dmp