Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    08-02-2025 19:49

General

  • Target

    8d34477674ccda710d5acd22a1ea3ce7c9e818d7b6d3b19200c896fcf42f5b4b.exe

  • Size

    3.2MB

  • MD5

    4735bb00bcb92c0c5d85599e289925ef

  • SHA1

    90dee1ecc8721777366e9c0d2d3c9fc2df6a925b

  • SHA256

    8d34477674ccda710d5acd22a1ea3ce7c9e818d7b6d3b19200c896fcf42f5b4b

  • SHA512

    673a67e73f8d3a31403cee50234d3160afe3eda75f75935677f9da0e955e28e67d9265c1a23c80b0fab7bd1aaa85ece8e3bf1bf085e76d9cbbd498a34a77287e

  • SSDEEP

    98304:BjxkN1YiQ2DmsiJb0D2OG5Mbser0ZAY8pD1X0C:B161YitDZiJoZgAY8pDl0

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 15 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • System policy modification 1 TTPs 6 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\8d34477674ccda710d5acd22a1ea3ce7c9e818d7b6d3b19200c896fcf42f5b4b.exe
    "C:\Users\Admin\AppData\Local\Temp\8d34477674ccda710d5acd22a1ea3ce7c9e818d7b6d3b19200c896fcf42f5b4b.exe"
    1⤵
    • UAC bypass
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1996
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\kUQ81SEYlx.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2020
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:1312
        • C:\Users\Default\dllhost.exe
          "C:\Users\Default\dllhost.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:1372
          • C:\Windows\System32\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\3a7f6492-0c83-43ea-a806-7e585681b521.vbs"
            4⤵
              PID:2220
            • C:\Windows\System32\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\3e473c6f-49b7-4b0e-b707-7ec3ac9f3720.vbs"
              4⤵
                PID:2096
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Cookies\WmiPrvSE.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2676
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Users\Admin\Cookies\WmiPrvSE.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2708
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Cookies\WmiPrvSE.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1504
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsass.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2292
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2644
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1808
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Users\Default\dllhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2428
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2620
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Users\Default\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1744
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1356
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2248
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:972
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Media Player\Idle.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2996
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\Idle.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2512
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Media Player\Idle.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1216
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1540
        • C:\Windows\system32\wbem\WmiApSrv.exe
          C:\Windows\system32\wbem\WmiApSrv.exe
          1⤵
            PID:568

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Program Files\Windows Media Player\Idle.exe

            Filesize

            3.2MB

            MD5

            4735bb00bcb92c0c5d85599e289925ef

            SHA1

            90dee1ecc8721777366e9c0d2d3c9fc2df6a925b

            SHA256

            8d34477674ccda710d5acd22a1ea3ce7c9e818d7b6d3b19200c896fcf42f5b4b

            SHA512

            673a67e73f8d3a31403cee50234d3160afe3eda75f75935677f9da0e955e28e67d9265c1a23c80b0fab7bd1aaa85ece8e3bf1bf085e76d9cbbd498a34a77287e

          • C:\Users\Admin\AppData\Local\Temp\3a7f6492-0c83-43ea-a806-7e585681b521.vbs

            Filesize

            704B

            MD5

            9016033a8559e208eec63b53d2f3af9b

            SHA1

            a0467c9d846faa5fa55665dfbf7767f6135cfd2c

            SHA256

            0164a90b6a9fd65537ad07632a513b434b15391eac1055976d0ef160f6f334c5

            SHA512

            ae891de259e8409c8a2e96b7307a212ff08bec5bb095e093b93500490cebba177e92a66f81afaf53e10f855c32b48bce77b4167a98ac415fd9a78ad0345aae11

          • C:\Users\Admin\AppData\Local\Temp\3e473c6f-49b7-4b0e-b707-7ec3ac9f3720.vbs

            Filesize

            480B

            MD5

            2929da9652222ca212fec0c910f85598

            SHA1

            29366e80e29ecf5f3f4f27f6df5524fa662a189a

            SHA256

            212d7aec747864e4aea0571fd81bd0d2dfc643a651c731dffbb4694e145683fb

            SHA512

            e7552422b51c40a45ba8a51e203a036db38d497a86d7218420bf4a9b136342011443ab47d7c6af3ab933fac4e42814a8e34f9ea23db2ced947c04474364d7806

          • C:\Users\Admin\AppData\Local\Temp\kUQ81SEYlx.bat

            Filesize

            193B

            MD5

            18ede0ece61228641054f892688724f6

            SHA1

            08fae069c5e002487abecf672f9a40c136bb6a8e

            SHA256

            be0e34ba840a4d8a5cc88aaecdc49638c6dd6c2bf8f77cf48816ee650818cc28

            SHA512

            0cae0012042f3e79eec1594b73cf5791f2e6967790c7f71df95a90ed35633d6b1923ed2460eca70fdfcf63f504efe1d21aa04d70207113c7bfcf05a23ce7b66d

          • memory/1372-55-0x0000000000830000-0x0000000000842000-memory.dmp

            Filesize

            72KB

          • memory/1372-54-0x0000000000370000-0x00000000006AE000-memory.dmp

            Filesize

            3.2MB

          • memory/1996-20-0x0000000000CF0000-0x0000000000D02000-memory.dmp

            Filesize

            72KB

          • memory/1996-25-0x000000001AF10000-0x000000001AF1C000-memory.dmp

            Filesize

            48KB

          • memory/1996-8-0x00000000004A0000-0x00000000004B6000-memory.dmp

            Filesize

            88KB

          • memory/1996-9-0x00000000004C0000-0x00000000004C8000-memory.dmp

            Filesize

            32KB

          • memory/1996-10-0x00000000004E0000-0x00000000004F2000-memory.dmp

            Filesize

            72KB

          • memory/1996-11-0x0000000000670000-0x000000000067C000-memory.dmp

            Filesize

            48KB

          • memory/1996-12-0x00000000004D0000-0x00000000004D8000-memory.dmp

            Filesize

            32KB

          • memory/1996-13-0x0000000000AB0000-0x0000000000AC0000-memory.dmp

            Filesize

            64KB

          • memory/1996-14-0x0000000000AC0000-0x0000000000ACA000-memory.dmp

            Filesize

            40KB

          • memory/1996-15-0x0000000000AD0000-0x0000000000B26000-memory.dmp

            Filesize

            344KB

          • memory/1996-16-0x0000000000B20000-0x0000000000B2C000-memory.dmp

            Filesize

            48KB

          • memory/1996-17-0x0000000000B30000-0x0000000000B38000-memory.dmp

            Filesize

            32KB

          • memory/1996-18-0x0000000000B40000-0x0000000000B4C000-memory.dmp

            Filesize

            48KB

          • memory/1996-19-0x0000000000CE0000-0x0000000000CE8000-memory.dmp

            Filesize

            32KB

          • memory/1996-0-0x000007FEF5DE3000-0x000007FEF5DE4000-memory.dmp

            Filesize

            4KB

          • memory/1996-21-0x0000000001300000-0x0000000001308000-memory.dmp

            Filesize

            32KB

          • memory/1996-22-0x0000000001310000-0x000000000131C000-memory.dmp

            Filesize

            48KB

          • memory/1996-23-0x0000000001320000-0x0000000001328000-memory.dmp

            Filesize

            32KB

          • memory/1996-24-0x000000001AF00000-0x000000001AF0C000-memory.dmp

            Filesize

            48KB

          • memory/1996-7-0x0000000000490000-0x0000000000498000-memory.dmp

            Filesize

            32KB

          • memory/1996-26-0x000000001B030000-0x000000001B038000-memory.dmp

            Filesize

            32KB

          • memory/1996-27-0x000000001B020000-0x000000001B02C000-memory.dmp

            Filesize

            48KB

          • memory/1996-28-0x000000001B140000-0x000000001B14A000-memory.dmp

            Filesize

            40KB

          • memory/1996-29-0x000000001B150000-0x000000001B15E000-memory.dmp

            Filesize

            56KB

          • memory/1996-30-0x000000001B160000-0x000000001B168000-memory.dmp

            Filesize

            32KB

          • memory/1996-31-0x000000001B170000-0x000000001B17E000-memory.dmp

            Filesize

            56KB

          • memory/1996-32-0x000000001B180000-0x000000001B188000-memory.dmp

            Filesize

            32KB

          • memory/1996-33-0x000000001B190000-0x000000001B198000-memory.dmp

            Filesize

            32KB

          • memory/1996-34-0x000000001B1A0000-0x000000001B1AA000-memory.dmp

            Filesize

            40KB

          • memory/1996-35-0x000000001B1B0000-0x000000001B1BC000-memory.dmp

            Filesize

            48KB

          • memory/1996-6-0x0000000000470000-0x000000000048C000-memory.dmp

            Filesize

            112KB

          • memory/1996-5-0x0000000000460000-0x0000000000468000-memory.dmp

            Filesize

            32KB

          • memory/1996-51-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

            Filesize

            9.9MB

          • memory/1996-4-0x0000000000340000-0x000000000034E000-memory.dmp

            Filesize

            56KB

          • memory/1996-3-0x00000000001D0000-0x00000000001DE000-memory.dmp

            Filesize

            56KB

          • memory/1996-2-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

            Filesize

            9.9MB

          • memory/1996-1-0x0000000001330000-0x000000000166E000-memory.dmp

            Filesize

            3.2MB