Analysis

  • max time kernel
    119s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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 21 IoCs

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

  • Dcrat family
  • Process spawned unexpected child process 18 IoCs

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

  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Drops file in Program Files directory 9 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 key 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 36 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⤵
    • DcRat
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Users\Admin\AppData\Local\Temp\RayCheats.exe
      "C:\Users\Admin\AppData\Local\Temp\RayCheats.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1976
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Nursultan\CXMe2.vbe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2892
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Roaming\Nursultan\zvsDOSOzYWKFo4ZM.bat" "
          4⤵
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2212
          • C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe
            "C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe"
            5⤵
            • DcRat
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2708
            • C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe
              "C:\Users\Admin\AppData\Roaming\Nursultan\comSession.exe"
              6⤵
              • Executes dropped EXE
              • Drops file in Program Files directory
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2772
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hXXWk5pvz3.bat"
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:604
                • C:\Windows\system32\w32tm.exe
                  w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                  8⤵
                    PID:1596
                  • C:\Program Files\Uninstall Information\comSession.exe
                    "C:\Program Files\Uninstall Information\comSession.exe"
                    8⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2528
            • 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:1708
        • 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:2928
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\10\Cartridges\lsass.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\10\Cartridges\lsass.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\10\Cartridges\lsass.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:808
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Program Files\Internet Explorer\SIGNUP\sppsvc.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3016
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\SIGNUP\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1244
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Program Files\Internet Explorer\SIGNUP\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1256
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2036
    • 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⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1092
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1440
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Program Files\7-Zip\spoolsv.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2536
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\7-Zip\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3040
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Program Files\7-Zip\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3024
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Videos\services.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2180
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default\Videos\services.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2328
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Videos\services.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2148
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "comSessionc" /sc MINUTE /mo 6 /tr "'C:\Program Files\Uninstall Information\comSession.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2496
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "comSession" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\comSession.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2664
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "comSessionc" /sc MINUTE /mo 10 /tr "'C:\Program Files\Uninstall Information\comSession.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1088

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\hXXWk5pvz3.bat

      Filesize

      218B

      MD5

      ab9414801ac561309a25943d44835fdd

      SHA1

      22d78f49e17eed5b5d29665359cef1ca46fcfe0f

      SHA256

      6125a497dff727994322971c7db5df582a989851efe7202f2640576ee17d1262

      SHA512

      50034ce6cf59954ea01b15d1a1322fe0b0f6a7eae4f5a9a494c2bd2121aa279bfc533cae5ac25436be60c58a4fba66952ccefb6a8c74863270ec47f345e9b204

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

      Filesize

      209B

      MD5

      484bfd68922e5e27228c2fa473677110

      SHA1

      eb2495adad200e316f7d5961b668a2af32958fce

      SHA256

      7a11a2afd7914cc6d77553b3d44af9a3bbd65551af2a551138fb27ecb066d442

      SHA512

      0b4f2acc2d5e4cb7cb3e5f105e29f9ef1640a76e22039b7b6337b1d0e7aacde29f107ae3c5e08b8b1c6d419cb40877d7d7e66721eb7320096a24162eecd9ccf0

    • 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

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

      Filesize

      2.7MB

      MD5

      db35ed4e6955685c244b4ac954115fff

      SHA1

      751834b825b6e17b489f33e1e3b17c7c3c1295ab

      SHA256

      c3babdee670d6cf922cb746a997f5ee112a11a141584c0eb703d192fc1fcee64

      SHA512

      9facb2880120ccb677cf96e4b911685f0c18317e6a4e9d7b34b6363fa6e32e864f6b893f3023fb743481e1dcb39fcd83602735c569342ace49281044c52f2d5f

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

      Filesize

      2.4MB

      MD5

      1b6bf62c6d2fe41fcb3d8dd8372abba6

      SHA1

      ea6c66691c5dd2c014f47145d44525d39e08aea8

      SHA256

      84c35170f401c1b809aaa7888f79fe11860798fe3a82328383840e1d133f9d2e

      SHA512

      fbf727e76880f1ea6132c8491bfc2d218d48ad12c6672c64bd9928ab8f46bea16454d696bceb515f0b22195c6456ee66305cda41ffdbd6fa66f40cc520009c2b

    • memory/2528-57-0x0000000000590000-0x00000000005A2000-memory.dmp

      Filesize

      72KB

    • memory/2528-56-0x00000000012D0000-0x0000000001532000-memory.dmp

      Filesize

      2.4MB

    • memory/2708-29-0x0000000000970000-0x0000000000986000-memory.dmp

      Filesize

      88KB

    • memory/2708-30-0x0000000002290000-0x00000000022E6000-memory.dmp

      Filesize

      344KB

    • memory/2708-31-0x0000000000530000-0x0000000000542000-memory.dmp

      Filesize

      72KB

    • memory/2708-32-0x0000000000990000-0x000000000099E000-memory.dmp

      Filesize

      56KB

    • memory/2708-33-0x00000000022E0000-0x00000000022E8000-memory.dmp

      Filesize

      32KB

    • memory/2708-34-0x00000000022F0000-0x00000000022F8000-memory.dmp

      Filesize

      32KB

    • memory/2708-28-0x0000000000950000-0x000000000096C000-memory.dmp

      Filesize

      112KB

    • memory/2708-27-0x0000000000350000-0x000000000035E000-memory.dmp

      Filesize

      56KB

    • memory/2708-26-0x00000000009A0000-0x0000000000C02000-memory.dmp

      Filesize

      2.4MB

    • memory/2772-40-0x0000000000520000-0x0000000000532000-memory.dmp

      Filesize

      72KB