Analysis

  • max time kernel
    150s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    13-04-2024 18:45

General

  • Target

    1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52.exe

  • Size

    283KB

  • MD5

    dd58cddd601ba0d1d7fc157136a8a1c5

  • SHA1

    344292fb97107016fb925d93ff81cea9a7e92493

  • SHA256

    1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52

  • SHA512

    111e77ca531c6c5ccbb4d27308a4209014b9503a220e1e0b48bb63cde0200013a03963ebaa6e63bb0957e4038c5709e4017228934f74a16e1f3517381257a872

  • SSDEEP

    6144:7cNYk1yuwEDBum3qYWnl0pd0EX3Zq2b6wfIDYm0P0GT:7cWkbgTYWnYnt/IDYhP0GT

Malware Config

Extracted

Family

darkcomet

Botnet

220

C2

strateg.ddns.net:220

Mutex

DC_MUTEX-17TCUZ8

Attributes
  • InstallPath

    MSDCSC\explorer.exe

  • gencode

    ECU92camneaf

  • 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
  • UPX dump on OEP (original entry point) 20 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • 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
  • UPX packed file 20 IoCs

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

  • 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).

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52.exe
    "C:\Users\Admin\AppData\Local\Temp\1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1028
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2512
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:2648
    • 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:2520
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:2656
    • C:\Users\Admin\Documents\MSDCSC\explorer.exe
      "C:\Users\Admin\Documents\MSDCSC\explorer.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:2476
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
          PID:2628

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      283KB

      MD5

      dd58cddd601ba0d1d7fc157136a8a1c5

      SHA1

      344292fb97107016fb925d93ff81cea9a7e92493

      SHA256

      1305261a64890954599fb2d7578a5b20047ea415d00d5a219f7ae06c21c72a52

      SHA512

      111e77ca531c6c5ccbb4d27308a4209014b9503a220e1e0b48bb63cde0200013a03963ebaa6e63bb0957e4038c5709e4017228934f74a16e1f3517381257a872

    • memory/1028-15-0x00000000040E0000-0x00000000041A7000-memory.dmp

      Filesize

      796KB

    • memory/1028-1-0x00000000003E0000-0x00000000003E1000-memory.dmp

      Filesize

      4KB

    • memory/1028-0-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/1028-12-0x00000000040E0000-0x00000000041A7000-memory.dmp

      Filesize

      796KB

    • memory/1028-51-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-54-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-57-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-66-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-16-0x0000000000260000-0x0000000000261000-memory.dmp

      Filesize

      4KB

    • memory/2476-52-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-53-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-14-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-55-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-56-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-65-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-58-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-59-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-60-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-61-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-62-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-63-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2476-64-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/2628-18-0x0000000000080000-0x0000000000081000-memory.dmp

      Filesize

      4KB

    • memory/2628-50-0x00000000002E0000-0x00000000002E1000-memory.dmp

      Filesize

      4KB