Analysis

  • max time kernel
    134s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-11-2024 16:46

General

  • Target

    51ED2A0701D313F3761169D91FB69848.exe

  • Size

    2.4MB

  • MD5

    51ed2a0701d313f3761169d91fb69848

  • SHA1

    ed39a76db78d1d3c9c3a3a20d5dcf8da19e51ba3

  • SHA256

    1b304c8a2ae4546bd7958c7f22becaf6b682a5c88b7a01945a952de991b0ef0b

  • SHA512

    324bb255f7b5edef459ca8c5ec88509cd86f0fc060c546c9484294db5c97bcd56d0483b0074d63763f85fea0807ed2b3e10fb7749c797e0ea3d511382dd0be85

  • SSDEEP

    49152:3XfX30/e4wkPaOoMoa+QPPHPahen4S2V526is7K9gn6weB1din4OEU6zMa:nf0/e47aOoMcQP6M4S+4676P3wn4dz

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 21 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
  • Checks computer location settings 2 TTPs 4 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 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\51ED2A0701D313F3761169D91FB69848.exe
    "C:\Users\Admin\AppData\Local\Temp\51ED2A0701D313F3761169D91FB69848.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4912
    • C:\Users\Admin\AppData\Local\Temp\RayCheats.exe
      "C:\Users\Admin\AppData\Local\Temp\RayCheats.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:4108
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Nursultan\CXMe2.vbe"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2872
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Nursultan\zvsDOSOzYWKFo4ZM.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3876
          • C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe
            "C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3236
            • C:\Users\Admin\Documents\My Videos\SppExtComObj.exe
              "C:\Users\Admin\Documents\My Videos\SppExtComObj.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4088
          • C:\Windows\SysWOW64\reg.exe
            reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:4132
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Nursultan\file.vbs"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4180
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\Users\Default\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:5088
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Default\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4988
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Users\Default\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Program Files\Uninstall Information\fontdrvhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3460
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:636
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Program Files\Uninstall Information\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2404
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\regid.1991-06.com.microsoft\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4192
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\All Users\regid.1991-06.com.microsoft\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:920
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\regid.1991-06.com.microsoft\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:916
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4480
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1964
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1364
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2616
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3848
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Users\Default\My Documents\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2092
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Default\My Documents\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4684
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\Users\Default\My Documents\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4664
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\Documents\My Videos\SppExtComObj.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4868
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Users\Admin\Documents\My Videos\SppExtComObj.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2576
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Documents\My Videos\SppExtComObj.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2276

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\RayCheats.exe

    Filesize

    2.7MB

    MD5

    db35ed4e6955685c244b4ac954115fff

    SHA1

    751834b825b6e17b489f33e1e3b17c7c3c1295ab

    SHA256

    c3babdee670d6cf922cb746a997f5ee112a11a141584c0eb703d192fc1fcee64

    SHA512

    9facb2880120ccb677cf96e4b911685f0c18317e6a4e9d7b34b6363fa6e32e864f6b893f3023fb743481e1dcb39fcd83602735c569342ace49281044c52f2d5f

  • C:\Users\Admin\AppData\Roaming\Nursultan\CXMe2.vbe

    Filesize

    209B

    MD5

    484bfd68922e5e27228c2fa473677110

    SHA1

    eb2495adad200e316f7d5961b668a2af32958fce

    SHA256

    7a11a2afd7914cc6d77553b3d44af9a3bbd65551af2a551138fb27ecb066d442

    SHA512

    0b4f2acc2d5e4cb7cb3e5f105e29f9ef1640a76e22039b7b6337b1d0e7aacde29f107ae3c5e08b8b1c6d419cb40877d7d7e66721eb7320096a24162eecd9ccf0

  • C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe

    Filesize

    2.4MB

    MD5

    1b6bf62c6d2fe41fcb3d8dd8372abba6

    SHA1

    ea6c66691c5dd2c014f47145d44525d39e08aea8

    SHA256

    84c35170f401c1b809aaa7888f79fe11860798fe3a82328383840e1d133f9d2e

    SHA512

    fbf727e76880f1ea6132c8491bfc2d218d48ad12c6672c64bd9928ab8f46bea16454d696bceb515f0b22195c6456ee66305cda41ffdbd6fa66f40cc520009c2b

  • C:\Users\Admin\AppData\Roaming\Nursultan\file.vbs

    Filesize

    34B

    MD5

    677cc4360477c72cb0ce00406a949c61

    SHA1

    b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

    SHA256

    f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

    SHA512

    7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

  • C:\Users\Admin\AppData\Roaming\Nursultan\zvsDOSOzYWKFo4ZM.bat

    Filesize

    148B

    MD5

    deb8d9eeb4557c39315338a00cd83916

    SHA1

    8ecc2410818d611e48e1ec81e7ab6ce88af420bf

    SHA256

    0e9a479bd000929602b921f116255053d01c3908837dcaae884765f48bb243b6

    SHA512

    88172330ba223eefad09e759dc769a7d976a0c1e00b28b30cd4b7cf2f8cb75d5589119fa1fcddf1e603a3ebd41bf2f65e0276464dbd1c59dc70ef4e86f0b10b8

  • memory/3236-29-0x000000001C270000-0x000000001C2C0000-memory.dmp

    Filesize

    320KB

  • memory/3236-27-0x000000001BBC0000-0x000000001BBCE000-memory.dmp

    Filesize

    56KB

  • memory/3236-28-0x000000001BBF0000-0x000000001BC0C000-memory.dmp

    Filesize

    112KB

  • memory/3236-26-0x0000000000E60000-0x00000000010C2000-memory.dmp

    Filesize

    2.4MB

  • memory/3236-30-0x000000001BC10000-0x000000001BC26000-memory.dmp

    Filesize

    88KB

  • memory/3236-31-0x000000001C2C0000-0x000000001C316000-memory.dmp

    Filesize

    344KB

  • memory/3236-32-0x000000001BBD0000-0x000000001BBE2000-memory.dmp

    Filesize

    72KB

  • memory/3236-33-0x000000001CBB0000-0x000000001D0D8000-memory.dmp

    Filesize

    5.2MB

  • memory/3236-34-0x000000001BC50000-0x000000001BC5E000-memory.dmp

    Filesize

    56KB

  • memory/3236-36-0x000000001C320000-0x000000001C328000-memory.dmp

    Filesize

    32KB

  • memory/3236-35-0x000000001C310000-0x000000001C318000-memory.dmp

    Filesize

    32KB

  • memory/4088-63-0x0000000002B70000-0x0000000002B82000-memory.dmp

    Filesize

    72KB