Analysis

  • max time kernel
    150s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    26-12-2024 11:11

General

  • Target

    8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe

  • Size

    251KB

  • MD5

    57bd4f73690590693b5b921f29679410

  • SHA1

    c2cb47bf602541043589e979f21c3d7c1698e3ac

  • SHA256

    8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa

  • SHA512

    00b543644058a93f1c0a13e4d40b1c4e76f9581325f1773d79983761ca6903643e5a44717e7785b27a8fac2a6609c19032e3f412d3339e9cc5dc697791890318

  • SSDEEP

    6144:ZcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:ZcW7KEZlPzCy37

Malware Config

Extracted

Family

darkcomet

Botnet

GoogleDebugger

C2

147.185.221.24:14161

Mutex

RO_MUTEX-8HU43EZ

Attributes
  • InstallPath

    ChromeCookies\ChromeCookie.exe

  • gencode

    WN0BLB8aPxBw

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    GoogleDebugJ

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Disables Task Manager via registry modification
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • UPX packed file 18 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
    "C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2244
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2900
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2896
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:640
    • C:\Users\Admin\AppData\Local\Temp\ChromeCookies\ChromeCookie.exe
      "C:\Users\Admin\AppData\Local\Temp\ChromeCookies\ChromeCookie.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2204
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
          PID:2920
        • C:\Windows\explorer.exe
          "C:\Windows\explorer.exe"
          3⤵
            PID:2924
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            3⤵
            • System Location Discovery: System Language Discovery
            PID:2168

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • \Users\Admin\AppData\Local\Temp\ChromeCookies\ChromeCookie.exe

        Filesize

        251KB

        MD5

        57bd4f73690590693b5b921f29679410

        SHA1

        c2cb47bf602541043589e979f21c3d7c1698e3ac

        SHA256

        8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa

        SHA512

        00b543644058a93f1c0a13e4d40b1c4e76f9581325f1773d79983761ca6903643e5a44717e7785b27a8fac2a6609c19032e3f412d3339e9cc5dc697791890318

      • memory/2168-55-0x0000000000220000-0x0000000000221000-memory.dmp

        Filesize

        4KB

      • memory/2168-17-0x0000000000080000-0x0000000000081000-memory.dmp

        Filesize

        4KB

      • memory/2204-64-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-65-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-71-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-15-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-70-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-69-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-58-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-59-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-60-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-61-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-62-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-63-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-68-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-67-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2204-66-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2244-13-0x0000000004EA0000-0x0000000004F57000-memory.dmp

        Filesize

        732KB

      • memory/2244-0-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2244-57-0x0000000000400000-0x00000000004B7000-memory.dmp

        Filesize

        732KB

      • memory/2244-1-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2244-12-0x0000000004EA0000-0x0000000004F57000-memory.dmp

        Filesize

        732KB