Analysis

  • max time kernel
    117s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    20-07-2024 16:00

General

  • Target

    MalwareBazaar.exe

  • Size

    2.0MB

  • MD5

    6e4e01af6b88116f0c7331bba5e7b782

  • SHA1

    756c0a5ea8aac86f41d118166452a011a608043c

  • SHA256

    5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147

  • SHA512

    f49b6146f313624606a9eb80287c23c68aaefcf7ffafacba83a87b333b4388dd38a423a179b7bcb0e1d555873681b405c781faf68e2d7169fa7bcefe4a73874b

  • SSDEEP

    24576:jYe7C5QSBzoU/n15NuQtG+7IwzwT2wLqq12OBOa2WYO3QFSBztYSqEEU5oZUSzTO:jYemPM0tvmwGBF223ZztBqEqx9v

Malware Config

Signatures

  • DcRat 26 IoCs

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

  • Modifies WinLogon for persistence 2 TTPs 8 IoCs
  • Process spawned unexpected child process 24 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 1 IoCs
  • Adds Run key to start application 2 TTPs 16 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Program Files directory 9 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 24 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 60 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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\MalwareBazaar.exe
    "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
    1⤵
    • DcRat
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2284
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\P13wV4ygMl.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1168
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2920
        • C:\Users\Admin\wininit.exe
          "C:\Users\Admin\wininit.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:428
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Media Player\System.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3064
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\System.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2196
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Media Player\System.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\fr-FR\csrss.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2736
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\fr-FR\csrss.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2568
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\fr-FR\csrss.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2524
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\wininit.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2636
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Admin\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2556
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1056
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 8 /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\audiodg.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\audiodg.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2492
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 10 /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\audiodg.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1712
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\Favorites\Windows Live\lsass.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1860
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Admin\Favorites\Windows Live\lsass.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\Favorites\Windows Live\lsass.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Sidebar\wininit.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2824
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1072
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Sidebar\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1084
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 12 /tr "'C:\Windows\Migration\lsm.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1632
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\Migration\lsm.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1656
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Windows\Migration\lsm.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:588
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 11 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\OSPPSVC.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2092
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2096
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 7 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2192

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\P13wV4ygMl.bat

      Filesize

      191B

      MD5

      f9eb67a73779abfd618d3c365068d60a

      SHA1

      2b192feb5bda80bc277f838e541b3fef35b1545a

      SHA256

      0e045c2ed5e8d33f7889804e857b462eb47c450e7b650f7b6ea277ff87a23157

      SHA512

      5f1be0718273c044225248554d187e162d95aff97e6fc534b3ab565a0ac44aa22504eb190da3d9b533f0f7efa88db92169def621fac908843f38464487d39408

    • C:\Users\Admin\Favorites\Windows Live\lsass.exe

      Filesize

      2.0MB

      MD5

      6e4e01af6b88116f0c7331bba5e7b782

      SHA1

      756c0a5ea8aac86f41d118166452a011a608043c

      SHA256

      5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147

      SHA512

      f49b6146f313624606a9eb80287c23c68aaefcf7ffafacba83a87b333b4388dd38a423a179b7bcb0e1d555873681b405c781faf68e2d7169fa7bcefe4a73874b

    • memory/428-37-0x000000001AD30000-0x000000001AD86000-memory.dmp

      Filesize

      344KB

    • memory/428-36-0x0000000000BC0000-0x0000000000DCE000-memory.dmp

      Filesize

      2.1MB

    • memory/2284-4-0x0000000000280000-0x0000000000288000-memory.dmp

      Filesize

      32KB

    • memory/2284-5-0x0000000000490000-0x00000000004E6000-memory.dmp

      Filesize

      344KB

    • memory/2284-6-0x00000000004F0000-0x00000000004FC000-memory.dmp

      Filesize

      48KB

    • memory/2284-7-0x0000000000500000-0x000000000050C000-memory.dmp

      Filesize

      48KB

    • memory/2284-8-0x0000000000AB0000-0x0000000000ABC000-memory.dmp

      Filesize

      48KB

    • memory/2284-11-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

      Filesize

      9.9MB

    • memory/2284-12-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

      Filesize

      9.9MB

    • memory/2284-15-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

      Filesize

      9.9MB

    • memory/2284-0-0x000007FEF6063000-0x000007FEF6064000-memory.dmp

      Filesize

      4KB

    • memory/2284-3-0x0000000000250000-0x000000000025E000-memory.dmp

      Filesize

      56KB

    • memory/2284-33-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

      Filesize

      9.9MB

    • memory/2284-2-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

      Filesize

      9.9MB

    • memory/2284-1-0x0000000000AE0000-0x0000000000CEE000-memory.dmp

      Filesize

      2.1MB