Analysis

  • max time kernel
    167s
  • max time network
    75s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 15:31

General

  • Target

    abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe

  • Size

    604KB

  • MD5

    dc25d3ac1d767c4d12879c89602acfcb

  • SHA1

    53464889ff3e1792094e3ceb065539fccc82e9fe

  • SHA256

    abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

  • SHA512

    45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

  • SSDEEP

    12288:nw0S2XJbOAWPnp98pqBlBPh1U35s2dfnRBqU/x4ySG2GR:nnhX0AooO83fdfRwU54yV

Malware Config

Extracted

Family

darkcomet

Botnet

Victim

C2

jrusse.no-ip.org:5050

Mutex

DC_MUTEX-SANCFCW

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    Xl6PgidaJaTh

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    rundll32

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 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 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe
    "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1560
    • C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe
      "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:984
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1760
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:1112
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1704
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:436
      • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
        "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1660
        • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
          "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1956
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:1120

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      604KB

      MD5

      dc25d3ac1d767c4d12879c89602acfcb

      SHA1

      53464889ff3e1792094e3ceb065539fccc82e9fe

      SHA256

      abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

      SHA512

      45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

    • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      604KB

      MD5

      dc25d3ac1d767c4d12879c89602acfcb

      SHA1

      53464889ff3e1792094e3ceb065539fccc82e9fe

      SHA256

      abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

      SHA512

      45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

    • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      604KB

      MD5

      dc25d3ac1d767c4d12879c89602acfcb

      SHA1

      53464889ff3e1792094e3ceb065539fccc82e9fe

      SHA256

      abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

      SHA512

      45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

    • \Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      604KB

      MD5

      dc25d3ac1d767c4d12879c89602acfcb

      SHA1

      53464889ff3e1792094e3ceb065539fccc82e9fe

      SHA256

      abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

      SHA512

      45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

    • \Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      604KB

      MD5

      dc25d3ac1d767c4d12879c89602acfcb

      SHA1

      53464889ff3e1792094e3ceb065539fccc82e9fe

      SHA256

      abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

      SHA512

      45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

    • \Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

      Filesize

      604KB

      MD5

      dc25d3ac1d767c4d12879c89602acfcb

      SHA1

      53464889ff3e1792094e3ceb065539fccc82e9fe

      SHA256

      abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

      SHA512

      45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

    • memory/436-89-0x0000000000000000-mapping.dmp

    • memory/984-72-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-130-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-75-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-78-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-80-0x000000000048F888-mapping.dmp

    • memory/984-81-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-83-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-59-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-85-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-57-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-56-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-62-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-69-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/984-65-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1112-88-0x0000000000000000-mapping.dmp

    • memory/1120-127-0x0000000000000000-mapping.dmp

    • memory/1560-84-0x0000000074350000-0x00000000748FB000-memory.dmp

      Filesize

      5.7MB

    • memory/1560-55-0x0000000074350000-0x00000000748FB000-memory.dmp

      Filesize

      5.7MB

    • memory/1560-54-0x0000000076201000-0x0000000076203000-memory.dmp

      Filesize

      8KB

    • memory/1660-92-0x0000000000000000-mapping.dmp

    • memory/1660-126-0x0000000072690000-0x0000000072C3B000-memory.dmp

      Filesize

      5.7MB

    • memory/1660-128-0x0000000072690000-0x0000000072C3B000-memory.dmp

      Filesize

      5.7MB

    • memory/1704-87-0x0000000000000000-mapping.dmp

    • memory/1760-86-0x0000000000000000-mapping.dmp

    • memory/1956-121-0x000000000048F888-mapping.dmp

    • memory/1956-131-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB

    • memory/1956-132-0x0000000000400000-0x00000000004B2000-memory.dmp

      Filesize

      712KB