Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    19-01-2025 12:15

General

  • Target

    DCRatBuild.exe

  • Size

    1.5MB

  • MD5

    c421510c6a46fcf9b10c90672df57670

  • SHA1

    8bd03e0a5c08e1bdce3c89c5cff0c251010f6371

  • SHA256

    c15015876eb1710d01b4b3e624c08018c8d5c01d005b9a483be5edb17aaa709e

  • SHA512

    713bef3c610971b6b3d61ed492b93376fb2932acc328857d5558bdea519f6bebd386ed67744daa3a5d7f0ce635d9dcfb65930b902e6058855c721d165df16b11

  • SSDEEP

    24576:U2G/nvxW3Ww0tk1HW292457Vudtb6tphnwTlD7jL79usS68sRclBkfKWVedo:UbA30k12w5Dbh+lu08LIKWH

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Process spawned unexpected child process 33 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.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 33 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 15 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\DCRatBuild.exe
    "C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2944
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\chainReviewref\fxtCoJy7Ht1xOV11B7I3VXilRXeh8.vbe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2248
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\chainReviewref\IyoGT.bat" "
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3048
        • C:\chainReviewref\reviewhost.exe
          "C:\chainReviewref\reviewhost.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2624
          • C:\Users\Admin\NetHood\wininit.exe
            "C:\Users\Admin\NetHood\wininit.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2000
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Microsoft Help\sppsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2376
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\All Users\Microsoft Help\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2824
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\Microsoft Help\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2872
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\NetHood\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2708
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Admin\NetHood\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2844
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\NetHood\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2544
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Windows\fr-FR\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2988
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\fr-FR\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1296
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Windows\fr-FR\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1316
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "reviewhostr" /sc MINUTE /mo 9 /tr "'C:\Program Files\Common Files\System\ja-JP\reviewhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2356
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "reviewhost" /sc ONLOGON /tr "'C:\Program Files\Common Files\System\ja-JP\reviewhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "reviewhostr" /sc MINUTE /mo 5 /tr "'C:\Program Files\Common Files\System\ja-JP\reviewhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2752
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Journal\fr-FR\OSPPSVC.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1784
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Windows Journal\fr-FR\OSPPSVC.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2360
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Journal\fr-FR\OSPPSVC.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2088
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Recovery\1f4ba082-69f6-11ef-a143-62cb582c238c\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1704
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\1f4ba082-69f6-11ef-a143-62cb582c238c\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1672
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Recovery\1f4ba082-69f6-11ef-a143-62cb582c238c\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1944
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Users\Default User\Idle.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:636
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\Default User\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1272
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Windows\inf\.NET CLR Networking\0410\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2864
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\inf\.NET CLR Networking\0410\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2868
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Windows\inf\.NET CLR Networking\0410\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1104
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\conhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2300
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\conhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2416
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\conhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2960
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Google\Temp\WMIADAP.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1328
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Temp\WMIADAP.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1624
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Google\Temp\WMIADAP.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2096
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Uninstall Information\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:832
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Uninstall Information\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Uninstall Information\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2420

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\chainReviewref\IyoGT.bat

    Filesize

    34B

    MD5

    4cc5fe1e5caad477deaceb9ed2b5e7ab

    SHA1

    f893e423a3f0553f988fdbfa656e3da8dd207d13

    SHA256

    e0d987d0bf0342aafb7e849e08c5daa8520ad923876d78ec20a5404261c36903

    SHA512

    a3d455651c8f37ca4aee0f5e17e80ff109a6a1938c6632abdf72b0e0d0ee7a7a94d489f5da5b57a6882a194ec66eb9fa806c5601afd3f8bbdc59dc42d32e3e2b

  • C:\chainReviewref\fxtCoJy7Ht1xOV11B7I3VXilRXeh8.vbe

    Filesize

    196B

    MD5

    370ae5881ecdd2299a584eabca37cc6b

    SHA1

    411cbb2408957887c482e34e675fb6aa57ebc76e

    SHA256

    2f4965ecc489b5e6ab84a464781a6bd63ae869d1169a1667ab97a93abf5d9219

    SHA512

    baaa3406d40348b99b3967ef4683662a67b37462aa130ea730b458eccb3db9439beebe2d487cffd76e0ab2ceac6488fa76227912636eb5694d74300b75f08b07

  • C:\chainReviewref\reviewhost.exe

    Filesize

    1.2MB

    MD5

    3d9c2b0bbc617376e0a731da91f3d932

    SHA1

    9264fd8caf8f0371f94877905b18df988e573b1f

    SHA256

    4bbb48e394b53a7e9756fcb17908abc2752fe1c928280995f3f8b6edb981c8c4

    SHA512

    e4e47ad63857d9ea5a2b8129d7a5be289bc08607e37ac7c8c1f0dc2e1fdfede44ec584fed13041dd367ca976c8f47025c8f27a860c84adf86c934c3d6720be11

  • memory/2000-45-0x0000000000BB0000-0x0000000000CE2000-memory.dmp

    Filesize

    1.2MB

  • memory/2624-13-0x0000000000BC0000-0x0000000000CF2000-memory.dmp

    Filesize

    1.2MB

  • memory/2624-14-0x00000000003E0000-0x00000000003FC000-memory.dmp

    Filesize

    112KB

  • memory/2624-15-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2624-16-0x00000000003C0000-0x00000000003CC000-memory.dmp

    Filesize

    48KB