Analysis

  • max time kernel
    128s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/10/2022, 22:56

General

  • Target

    9a4c61c30d19e6f8a0f446d7207516b7a1597cccc6ef298f8ecf3fd8d67fe745.exe

  • Size

    1.3MB

  • MD5

    61da44a997c52ab4e3cb1388414f7527

  • SHA1

    c833ddae9ac47db3351ac3bd28962762e6b239bb

  • SHA256

    9a4c61c30d19e6f8a0f446d7207516b7a1597cccc6ef298f8ecf3fd8d67fe745

  • SHA512

    7142215a9263895275a6971bd0eb47b034fbfc7fcd12130b98c57fb19ab33f2000e95c24e2519d3c2e9d39a5c6780782d687b6960653789b058011ebbfe74b72

  • SSDEEP

    24576:U2G/nvxW3Ww0t6TnzGmVBDh4+aknuRRZJND0gFJ4rD/IjC:UbA30GnzV/q+DnsXg

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 6 IoCs

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

  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 6 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a4c61c30d19e6f8a0f446d7207516b7a1597cccc6ef298f8ecf3fd8d67fe745.exe
    "C:\Users\Admin\AppData\Local\Temp\9a4c61c30d19e6f8a0f446d7207516b7a1597cccc6ef298f8ecf3fd8d67fe745.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2440
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:1516
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\providercommon\1zu9dW.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2552
        • C:\providercommon\DllCommonsvc.exe
          "C:\providercommon\DllCommonsvc.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:112
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\DllCommonsvc.exe'
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2800
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\odt\smss.exe'
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1880
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\DllCommonsvc.exe'
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3964
          • C:\odt\smss.exe
            "C:\odt\smss.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:2064
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\odt\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:5092
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\odt\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1248
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\odt\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3372
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "DllCommonsvcD" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\DllCommonsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4008
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "DllCommonsvc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\DllCommonsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3552
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "DllCommonsvcD" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\DllCommonsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:812

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

          Filesize

          2KB

          MD5

          d85ba6ff808d9e5444a4b369f5bc2730

          SHA1

          31aa9d96590fff6981b315e0b391b575e4c0804a

          SHA256

          84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

          SHA512

          8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          944B

          MD5

          2e907f77659a6601fcc408274894da2e

          SHA1

          9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

          SHA256

          385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

          SHA512

          34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          944B

          MD5

          3a6bad9528f8e23fb5c77fbd81fa28e8

          SHA1

          f127317c3bc6407f536c0f0600dcbcf1aabfba36

          SHA256

          986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

          SHA512

          846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

        • C:\odt\smss.exe

          Filesize

          1.0MB

          MD5

          bd31e94b4143c4ce49c17d3af46bcad0

          SHA1

          f8c51ff3ff909531d9469d4ba1bbabae101853ff

          SHA256

          b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

          SHA512

          f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

        • C:\odt\smss.exe

          Filesize

          1.0MB

          MD5

          bd31e94b4143c4ce49c17d3af46bcad0

          SHA1

          f8c51ff3ff909531d9469d4ba1bbabae101853ff

          SHA256

          b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

          SHA512

          f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

        • C:\providercommon\1zu9dW.bat

          Filesize

          36B

          MD5

          6783c3ee07c7d151ceac57f1f9c8bed7

          SHA1

          17468f98f95bf504cc1f83c49e49a78526b3ea03

          SHA256

          8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

          SHA512

          c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

        • C:\providercommon\DllCommonsvc.exe

          Filesize

          1.0MB

          MD5

          bd31e94b4143c4ce49c17d3af46bcad0

          SHA1

          f8c51ff3ff909531d9469d4ba1bbabae101853ff

          SHA256

          b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

          SHA512

          f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

        • C:\providercommon\DllCommonsvc.exe

          Filesize

          1.0MB

          MD5

          bd31e94b4143c4ce49c17d3af46bcad0

          SHA1

          f8c51ff3ff909531d9469d4ba1bbabae101853ff

          SHA256

          b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

          SHA512

          f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

        • C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

          Filesize

          197B

          MD5

          8088241160261560a02c84025d107592

          SHA1

          083121f7027557570994c9fc211df61730455bb5

          SHA256

          2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

          SHA512

          20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

        • memory/112-139-0x0000000000A00000-0x0000000000B10000-memory.dmp

          Filesize

          1.1MB

        • memory/112-140-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/112-149-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/1880-148-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/1880-145-0x000001ED45EF0000-0x000001ED45F12000-memory.dmp

          Filesize

          136KB

        • memory/1880-155-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2064-152-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2064-159-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2800-151-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2800-158-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/3964-150-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB

        • memory/3964-156-0x00007FFAAEA20000-0x00007FFAAF4E1000-memory.dmp

          Filesize

          10.8MB