Analysis

  • max time kernel
    42s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    20/08/2022, 03:11

General

  • Target
    b925cc022f40bd9760f17382401923a1.exe
  • Size 2.9MB
  • Sample220820-dplhmseadq
  • SHA256 2caefa0a7a35443ddd685c40317b88257681b2972c9528cbb20eaeda6e6aa444
  • MD5 SHA1 SHA512
Score
10/10

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 27 IoCs

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

  • DCRat payload 8 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 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 27 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b925cc022f40bd9760f17382401923a1.exe
    "C:\Users\Admin\AppData\Local\Temp\b925cc022f40bd9760f17382401923a1.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1784
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\HyperBlockinto\8ByrmhXNvPxprG3WRBxKl.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:844
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\HyperBlockinto\37GELo5LtnK3KuG.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1920
        • C:\HyperBlockinto\msRef.exe
          "C:\HyperBlockinto\msRef.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:1708
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\AWYnwkmJfi.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1616
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:1256
              • C:\HyperBlockinto\spoolsv.exe
                "C:\HyperBlockinto\spoolsv.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\HyperBlockinto\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\HyperBlockinto\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1796
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\HyperBlockinto\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:520
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1104
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1560
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1380
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2008
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1004
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Users\Public\Downloads\lsm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:868
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Users\Public\Downloads\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:752
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Downloads\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 7 /tr "'C:\HyperBlockinto\lsm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1948
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\HyperBlockinto\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1420
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 7 /tr "'C:\HyperBlockinto\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1604
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Users\Default\SendTo\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1524
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Default\SendTo\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1192
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Users\Default\SendTo\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:956
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Recovery\c11c4da2-1a8a-11ed-8505-e0b24281b398\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:924
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\c11c4da2-1a8a-11ed-8505-e0b24281b398\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1712
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Recovery\c11c4da2-1a8a-11ed-8505-e0b24281b398\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:436
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Windows\Migration\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1744
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\Migration\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:316
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Windows\Migration\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:960
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\WmiPrvSE.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1952
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\WmiPrvSE.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1284
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\WmiPrvSE.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1408

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          37GELo5LtnK3KuG.bat

          • Path C:\HyperBlockinto\37GELo5LtnK3KuG.bat
          • Size 29B
          • SHA256 7f74dcf36b1b9e6e0cd479800089d09148f918c316f58e3f27ecbf9415c45264
          • MD5 SHA1 SHA512

          8ByrmhXNvPxprG3WRBxKl.vbe

          • Path C:\HyperBlockinto\8ByrmhXNvPxprG3WRBxKl.vbe
          • Size 206B
          • SHA256 033bede50ca0c6d20b9b7b5024e34ab6406e47f960f65b58315cd32dcd517f5e
          • MD5 SHA1 SHA512

          msRef.exe

          • Path C:\HyperBlockinto\msRef.exe
          • Size 2.5MB
          • SHA256 f06ff941c4b0d797493d5ec28b0bd3e87c5fce14779b81205dc88ea2a2377fc7
          • MD5 SHA1 SHA512 SSDEEP

          msRef.exe

          • Path C:\HyperBlockinto\msRef.exe
          • Size 2.5MB
          • SHA256 f06ff941c4b0d797493d5ec28b0bd3e87c5fce14779b81205dc88ea2a2377fc7
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path C:\HyperBlockinto\spoolsv.exe
          • Size 2.5MB
          • SHA256 f06ff941c4b0d797493d5ec28b0bd3e87c5fce14779b81205dc88ea2a2377fc7
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path C:\HyperBlockinto\spoolsv.exe
          • Size 2.5MB
          • SHA256 f06ff941c4b0d797493d5ec28b0bd3e87c5fce14779b81205dc88ea2a2377fc7
          • MD5 SHA1 SHA512 SSDEEP

          AWYnwkmJfi.bat

          • Path C:\Users\Admin\AppData\Local\Temp\AWYnwkmJfi.bat
          • Size 194B
          • SHA256 40b656eb61e3b861eb458e124706f105fae8667a562d25170485ba7c0bcdc9f6
          • MD5 SHA1 SHA512

          msRef.exe

          • Path \HyperBlockinto\msRef.exe
          • Size 2.5MB
          • SHA256 f06ff941c4b0d797493d5ec28b0bd3e87c5fce14779b81205dc88ea2a2377fc7
          • MD5 SHA1 SHA512 SSDEEP

          msRef.exe

          • Path \HyperBlockinto\msRef.exe
          • Size 2.5MB
          • SHA256 f06ff941c4b0d797493d5ec28b0bd3e87c5fce14779b81205dc88ea2a2377fc7
          • MD5 SHA1 SHA512 SSDEEP

          memory/984-83-0x0000000000750000-0x0000000000762000-memory.dmp

          memory/984-82-0x0000000000700000-0x0000000000756000-memory.dmp

          memory/984-81-0x0000000000300000-0x0000000000584000-memory.dmp

          memory/1708-67-0x00000000006E0000-0x00000000006FC000-memory.dmp

          memory/1708-72-0x00000000021D0000-0x00000000021DE000-memory.dmp

          memory/1708-73-0x0000000002310000-0x000000000231C000-memory.dmp

          memory/1708-74-0x00000000022E0000-0x00000000022EA000-memory.dmp

          memory/1708-71-0x00000000021C0000-0x00000000021D2000-memory.dmp

          memory/1708-70-0x00000000020F0000-0x0000000002146000-memory.dmp

          memory/1708-69-0x0000000000700000-0x0000000000710000-memory.dmp

          memory/1708-68-0x00000000020D0000-0x00000000020E6000-memory.dmp

          memory/1708-66-0x00000000006D0000-0x00000000006DE000-memory.dmp

          memory/1708-65-0x0000000000310000-0x0000000000594000-memory.dmp

          memory/1784-54-0x00000000762F1000-0x00000000762F3000-memory.dmp