Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250410-en
  • resource tags

    arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    17/04/2025, 16:50

General

  • Target

    setup.exe

  • Size

    712KB

  • MD5

    3d30882dd83cdbcb727fa9fe6f93180a

  • SHA1

    b4a951c7fe04688c25f91ccb887b8dc22fc759fd

  • SHA256

    1491e9e9a7feaba77ea5f3114cf10dc279e57f807bc5ab0a7044b8eb8df1377c

  • SHA512

    d0f2d0d83b5860982debe6118a74cb43d5b1f699deab73c73f79a24c19181bd796ab869d74fc46a8b76e49f0f516fb54b61c10ae5d5c662899f087d035fdda7b

  • SSDEEP

    12288:/kfaC8uq4tpQxf91tnVhKLw8lx+AByjQBDKRXxhXQoy0LEsj+xNcMvbTcvE4Tzgu:J/CD6fntnVX8yASqx0Fq4qbTcef2

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

giviker.zapto.org:100

127.0.0.1:81

Mutex

DC_MUTEX-V8U94FG

Attributes
  • InstallPath

    Windupdate\winupdate.exe

  • gencode

    g4pACYv8bQ%*

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    winupdate

rc4.plain

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 3 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Checks processor information in registry 2 TTPs 12 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\setup.exe
    "C:\Users\Admin\AppData\Local\Temp\setup.exe"
    1⤵
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6136
    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WIFIWP~1.EXE
      C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WIFIWP~1.EXE
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5560
      • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WIFIWP~1.EXE
        "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WIFIWP~1.EXE"
        3⤵
        • Modifies WinLogon for persistence
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1036
        • C:\Windows\SysWOW64\explorer.exe
          "C:\Windows\SysWOW64\explorer.exe"
          4⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4184
          • C:\Windows\SysWOW64\explorer.exe
            "C:\Windows\SysWOW64\explorer.exe"
            5⤵
              PID:1124
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1124 -s 96
                6⤵
                • Program crash
                PID:1640
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c rundll32.exe C:\Windows\system32\advpack.dll,DelNodeRunDLL32 "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1512
      • C:\Windows\system32\rundll32.exe
        rundll32.exe C:\Windows\system32\advpack.dll,DelNodeRunDLL32 "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\"
        2⤵
          PID:5556
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\Windupdate\winupdate.exe
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:3712
        • C:\Users\Admin\AppData\Roaming\Windupdate\winupdate.exe
          C:\Users\Admin\AppData\Roaming\Windupdate\winupdate.exe
          2⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2328
          • C:\Users\Admin\AppData\Roaming\Windupdate\winupdate.exe
            "C:\Users\Admin\AppData\Roaming\Windupdate\winupdate.exe"
            3⤵
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Checks processor information in registry
            • Enumerates system info in registry
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:5044
            • C:\Windows\SysWOW64\explorer.exe
              "C:\Windows\SysWOW64\explorer.exe"
              4⤵
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4780
              • C:\Windows\SysWOW64\explorer.exe
                "C:\Windows\SysWOW64\explorer.exe"
                5⤵
                • Checks BIOS information in registry
                • System Location Discovery: System Language Discovery
                • Checks processor information in registry
                • Enumerates system info in registry
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of SetWindowsHookEx
                PID:4484
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1124 -ip 1124
        1⤵
          PID:6052

        Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\explorer.exe.log

          Filesize

          128B

          MD5

          92bbf9af7d2dce28ff72dad3bbffa852

          SHA1

          b25288849fb939b02ce73a01a0252c4a2fd6c724

          SHA256

          6a304948382083a059262e7792a1773ebd35e9e8d77d2cbfebc0e661a8956fa3

          SHA512

          62f0ee8d580a1b73f4953fa998f6d0c892547bd8c93bb1644d907af7fd2471ce4b599bf6eb6118152a18f42182cb87a3dbf1f24276d171864fee8b9eb4877f21

        • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\UNTITL~1.EXE

          Filesize

          464KB

          MD5

          e528c9ceeb7f95c587085b8c81fadd32

          SHA1

          bf161fcfad797e54d20f21d7c60ad49cddf00856

          SHA256

          8edbf5024b447b4d9803fa0a47fa1cd815ae37701ecc2967d45e92721574c888

          SHA512

          feec96236d2a57deaa70c3f029c340bbc74f4650d6176fe362bd7faa9053660f0c82db712f523fe7b6aee6c93cb5c1f3227c0bec11036a5ddbbfeb37106f2382

        • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WIFIWP~1.EXE

          Filesize

          607KB

          MD5

          34023d08f16ead8bf2950977c6fd58bb

          SHA1

          cac710544bdad073f55190781073d52aa0036c41

          SHA256

          7f23e3050d990f95663fc4cea26673f3052c8f69f57a4f318a26603f344dbcde

          SHA512

          765f8038e5229e6f93c4b0a239783469b7db0ab0672a0ad846f102bb834c83857111c3d12151ba2d59c79a172e9985c26b1e6dae77918e90dd6aa8bc3b37181d

        • memory/1036-70-0x0000000000400000-0x00000000004B0000-memory.dmp

          Filesize

          704KB

        • memory/1036-226-0x0000000000400000-0x00000000004B0000-memory.dmp

          Filesize

          704KB

        • memory/1036-78-0x0000000000400000-0x00000000004B0000-memory.dmp

          Filesize

          704KB

        • memory/1036-74-0x0000000000400000-0x00000000004B0000-memory.dmp

          Filesize

          704KB

        • memory/1036-68-0x0000000000400000-0x00000000004B0000-memory.dmp

          Filesize

          704KB

        • memory/1036-71-0x0000000000400000-0x00000000004B0000-memory.dmp

          Filesize

          704KB

        • memory/2328-107-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-92-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-91-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-93-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-96-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-100-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-113-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-94-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-95-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-97-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-99-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-101-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-102-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-103-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-104-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-105-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-106-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-108-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-109-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-82-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-110-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-111-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-112-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-114-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/2328-98-0x0000000000770000-0x0000000000790000-memory.dmp

          Filesize

          128KB

        • memory/5560-18-0x00000000007D0000-0x00000000007E0000-memory.dmp

          Filesize

          64KB

        • memory/5560-51-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-40-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-37-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-41-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-42-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-43-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-44-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-45-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-47-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-48-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-49-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-50-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-16-0x00000000007D0000-0x00000000007E0000-memory.dmp

          Filesize

          64KB

        • memory/5560-73-0x0000000073880000-0x0000000073E31000-memory.dmp

          Filesize

          5.7MB

        • memory/5560-67-0x0000000073880000-0x0000000073E31000-memory.dmp

          Filesize

          5.7MB

        • memory/5560-75-0x0000000073880000-0x0000000073E31000-memory.dmp

          Filesize

          5.7MB

        • memory/5560-19-0x0000000073881000-0x0000000073882000-memory.dmp

          Filesize

          4KB

        • memory/5560-38-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-21-0x0000000073880000-0x0000000073E31000-memory.dmp

          Filesize

          5.7MB

        • memory/5560-27-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-22-0x0000000073880000-0x0000000073E31000-memory.dmp

          Filesize

          5.7MB

        • memory/5560-46-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-26-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-52-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-39-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-36-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-35-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-34-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-32-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-33-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-28-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-24-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-23-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-30-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-31-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-29-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-25-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB

        • memory/5560-17-0x00000000007D0000-0x00000000007E0000-memory.dmp

          Filesize

          64KB

        • memory/5560-7-0x0000000000780000-0x00000000007A0000-memory.dmp

          Filesize

          128KB