Analysis

  • max time kernel
    120s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    23/10/2023, 17:50

General

  • Target

    NEAS.ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1exe_JC.exe

  • Size

    1.8MB

  • MD5

    042131ad58f4624f9722ce342319396b

  • SHA1

    e55031479a1a376eb230d91ae3352dfb24b5abaf

  • SHA256

    ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1

  • SHA512

    aaed88b7be43daa14798b867c3ec3c67c0c079bb50a496ff0ecf4db7709f77917882c9d8f02ad0e6b090ce5a3dca8e644948631b539aaca3885908df92e34505

  • SSDEEP

    24576:hV2ut7GyxsE5HOT3RcchdduLG0ZAQo0wRBq+QEf9oDGIv:bjtFsRcQdiG0ZvcuGy

Malware Config

Signatures

  • DcRat 41 IoCs

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Modifies WinLogon for persistence 2 TTPs 13 IoCs
  • Process spawned unexpected child process 39 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 26 IoCs
  • Drops file in Program Files directory 12 IoCs
  • Drops file in Windows directory 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 39 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEAS.ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1exe_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1exe_JC.exe"
    1⤵
    • DcRat
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2852
    • C:\Windows\de-DE\dwm.exe
      "C:\Windows\de-DE\dwm.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1032
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\explorer.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2380
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\explorer.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2688
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\explorer.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2660
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\lsass.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2308
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\MSOCache\All Users\lsass.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2832
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\lsass.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2580
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Windows\security\audit\explorer.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2648
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\security\audit\explorer.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Windows\security\audit\explorer.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2992
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\Recovery\d10510a2-6fc3-11ee-bc6f-a02387f916ed\taskhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1936
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\d10510a2-6fc3-11ee-bc6f-a02387f916ed\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:436
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Recovery\d10510a2-6fc3-11ee-bc6f-a02387f916ed\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:564
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Windows\Logs\DPX\lsm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1416
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\Logs\DPX\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1012
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Windows\Logs\DPX\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1644
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\sppsvc.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2876
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2960
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1368
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 12 /tr "'C:\Windows\de-DE\dwm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1956
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\de-DE\dwm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:788
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Windows\de-DE\dwm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1408
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Windows\Registration\CRMLog\csrss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:276
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\Registration\CRMLog\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:760
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Windows\Registration\CRMLog\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1912
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Adobe\Reader 9.0\lsass.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1064
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Reader 9.0\lsass.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2208
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Adobe\Reader 9.0\lsass.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Program Files\Java\winlogon.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2536
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\Java\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1512
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Program Files\Java\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1768
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 11 /tr "'C:\Program Files\Uninstall Information\lsm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2268
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1724
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Program Files\Uninstall Information\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2172
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\audiodg.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2924
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\audiodg.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2940
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\audiodg.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2920
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Program Files\Java\jdk1.7.0_80\dwm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2272
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Java\jdk1.7.0_80\dwm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1040
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Program Files\Java\jdk1.7.0_80\dwm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2908

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Windows\Logs\DPX\lsm.exe

          Filesize

          1.8MB

          MD5

          042131ad58f4624f9722ce342319396b

          SHA1

          e55031479a1a376eb230d91ae3352dfb24b5abaf

          SHA256

          ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1

          SHA512

          aaed88b7be43daa14798b867c3ec3c67c0c079bb50a496ff0ecf4db7709f77917882c9d8f02ad0e6b090ce5a3dca8e644948631b539aaca3885908df92e34505

        • C:\Windows\de-DE\dwm.exe

          Filesize

          1.8MB

          MD5

          042131ad58f4624f9722ce342319396b

          SHA1

          e55031479a1a376eb230d91ae3352dfb24b5abaf

          SHA256

          ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1

          SHA512

          aaed88b7be43daa14798b867c3ec3c67c0c079bb50a496ff0ecf4db7709f77917882c9d8f02ad0e6b090ce5a3dca8e644948631b539aaca3885908df92e34505

        • C:\Windows\de-DE\dwm.exe

          Filesize

          1.8MB

          MD5

          042131ad58f4624f9722ce342319396b

          SHA1

          e55031479a1a376eb230d91ae3352dfb24b5abaf

          SHA256

          ad36fd29255e2cc7311a9ee8acf001adb391d8e7f7ab084db88b772fb6d8c2e1

          SHA512

          aaed88b7be43daa14798b867c3ec3c67c0c079bb50a496ff0ecf4db7709f77917882c9d8f02ad0e6b090ce5a3dca8e644948631b539aaca3885908df92e34505

        • memory/1032-48-0x000007FEF5FF0000-0x000007FEF69DC000-memory.dmp

          Filesize

          9.9MB

        • memory/1032-46-0x00000000002F0000-0x0000000000302000-memory.dmp

          Filesize

          72KB

        • memory/1032-44-0x000000001B100000-0x000000001B180000-memory.dmp

          Filesize

          512KB

        • memory/1032-43-0x000007FEF5FF0000-0x000007FEF69DC000-memory.dmp

          Filesize

          9.9MB

        • memory/1032-42-0x0000000000EA0000-0x0000000001072000-memory.dmp

          Filesize

          1.8MB

        • memory/2852-5-0x0000000000620000-0x0000000000676000-memory.dmp

          Filesize

          344KB

        • memory/2852-9-0x0000000000B90000-0x0000000000B98000-memory.dmp

          Filesize

          32KB

        • memory/2852-8-0x0000000000670000-0x0000000000678000-memory.dmp

          Filesize

          32KB

        • memory/2852-7-0x00000000004E0000-0x00000000004EE000-memory.dmp

          Filesize

          56KB

        • memory/2852-6-0x0000000000160000-0x0000000000172000-memory.dmp

          Filesize

          72KB

        • memory/2852-0-0x0000000000820000-0x00000000009F2000-memory.dmp

          Filesize

          1.8MB

        • memory/2852-4-0x0000000000600000-0x0000000000616000-memory.dmp

          Filesize

          88KB

        • memory/2852-45-0x000007FEF5FF0000-0x000007FEF69DC000-memory.dmp

          Filesize

          9.9MB

        • memory/2852-3-0x0000000000140000-0x000000000015C000-memory.dmp

          Filesize

          112KB

        • memory/2852-2-0x000000001B060000-0x000000001B0E0000-memory.dmp

          Filesize

          512KB

        • memory/2852-47-0x000000001B060000-0x000000001B0E0000-memory.dmp

          Filesize

          512KB

        • memory/2852-1-0x000007FEF5FF0000-0x000007FEF69DC000-memory.dmp

          Filesize

          9.9MB