Analysis

  • max time kernel
    120s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    31-05-2024 15:41

General

  • Target

    nursultan nexgen fix.exe

  • Size

    1.5MB

  • MD5

    a3d07c747770c9a471a44446e46e33d5

  • SHA1

    8340534fb1770bae9660287ddb0496e243efcfe4

  • SHA256

    16015088c3352a8257f420555e7ce6245aa0e6682deeca79bf7e08c24e1ac3de

  • SHA512

    307cbdddaa9f426f8ceec060c2c0b1ab5ed3573e327dbcfdda7b1dfd22cf17559f017d835d71bdd15397fa95b0c7dfbfb4cd6b51cd5b2adc1d1cddc8ffe27f99

  • SSDEEP

    24576:U2G/nvxW3Ww0tpfnNGcvUCxt9groiK5Cg3ZRvm43TzvmF2cK07:UbA30pfnLRRgrheJROuTzvIR

Malware Config

Signatures

  • DcRat

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

  • Process spawned unexpected child process 42 IoCs

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

  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 42 IoCs

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

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 19 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\nursultan nexgen fix.exe
    "C:\Users\Admin\AppData\Local\Temp\nursultan nexgen fix.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1444
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2008
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2652
        • C:\portagentbrowserweb\Containerruntime.exe
          "C:\portagentbrowserweb\Containerruntime.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2712
          • C:\portagentbrowserweb\dwm.exe
            "C:\portagentbrowserweb\dwm.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:836
        • C:\Windows\SysWOW64\reg.exe
          reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
          4⤵
          • Modifies registry key
          PID:876
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\portagentbrowserweb\sppsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2648
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\portagentbrowserweb\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2684
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\portagentbrowserweb\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2752
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 11 /tr "'C:\portagentbrowserweb\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2576
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\portagentbrowserweb\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 12 /tr "'C:\portagentbrowserweb\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2952
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2488
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1792
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1608
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Common Files\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2812
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2692
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Common Files\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2756
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Users\Public\Downloads\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1808
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Public\Downloads\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1636
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 11 /tr "'C:\Users\Public\Downloads\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1848
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Portable Devices\Idle.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1972
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1944
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Portable Devices\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1952
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\portagentbrowserweb\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2944
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\portagentbrowserweb\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1684
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\portagentbrowserweb\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Desktop\services.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2184
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Public\Desktop\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1512
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\Users\Public\Desktop\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:840
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\conhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1764
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\conhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2252
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\conhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2144
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2320
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2280
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:572
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2300
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2024
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:580
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1728
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1856
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2216
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Photo Viewer\fr-FR\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2376
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\fr-FR\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1232
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Photo Viewer\fr-FR\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:868
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 9 /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\cmd.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1368
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\cmd.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1044
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 14 /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\cmd.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1100

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat
    Filesize

    157B

    MD5

    c8f8a078dace2ff4cb106803c9199643

    SHA1

    a5029ff4c4f0f24b0fbe2951c9a8002501ebd3b5

    SHA256

    1b99d39fa273f33b072c67e0df7d33b1699fa17b7c7139467a658302a5ed0e0d

    SHA512

    efaea3b4653768bbd135a0ec55319df2464f1d440ad982f31a5eff05c5ba5032f4718683ff6419c668bf1f34a117b5a101f56d1efc1d74ad93e692c52686f999

  • C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe
    Filesize

    220B

    MD5

    61a07f2f9e8e9b1f5175b2d60c3e3f18

    SHA1

    e695b0c2b43c786453bf3f6ae504f0626951d281

    SHA256

    5c75708ec9e4fe419a2fd1067bd5793bacb28140177cc6b36300fbf28e7c23d1

    SHA512

    8ef3529f6bf504224e7803019f1e162aead7961bc1a5115f50fb5f580570e8b04707da21a7aab4eb7f1554a3b5333597fb3335e5f6a74dabfdb0583eecb35b5d

  • \portagentbrowserweb\Containerruntime.exe
    Filesize

    1.2MB

    MD5

    5887a563351ca99247b7e2c448bd9f2e

    SHA1

    b24695e88143863297535989900bb7521ea86d67

    SHA256

    e74cbd74c838db604926e27322342c02f803b95f98680d4089b5c01ed93fb390

    SHA512

    b7d82bd09ba64891b75bbb9356de74a1ed0835709a391698c1301825777418f57e4f2ae3c260d3f7b6ada05d0e7ddeb4a6b75901fdf53bdd82ffa2febb685107

  • memory/836-51-0x0000000001380000-0x00000000014B2000-memory.dmp
    Filesize

    1.2MB

  • memory/2712-13-0x0000000000810000-0x0000000000942000-memory.dmp
    Filesize

    1.2MB

  • memory/2712-14-0x00000000004B0000-0x00000000004CC000-memory.dmp
    Filesize

    112KB

  • memory/2712-15-0x00000000004D0000-0x00000000004E6000-memory.dmp
    Filesize

    88KB

  • memory/2712-16-0x0000000000500000-0x000000000050C000-memory.dmp
    Filesize

    48KB