Analysis

  • max time kernel
    529s
  • max time network
    539s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/06/2024, 01:19

General

  • Target
    Mydoom/0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe
  • Size 9.4MB
  • Sample240611-bp1apaycle
  • SHA256 0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • DcRat

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

  • DCRat payload 1 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 25 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Mydoom\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe
    "C:\Users\Admin\AppData\Local\Temp\Mydoom\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2004
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4416
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:4772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4888
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:836
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1468
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:4940
    • C:\Users\Admin\AppData\Local\Temp\Mydoom\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe
      "C:\Users\Admin\AppData\Local\Temp\Mydoom\0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464.exe"
      2⤵
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1844
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\Offline Web Pages\WmiPrvSE.exe'" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3172
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "sysmon" /sc ONLOGON /tr "'C:\ProgramData\USOShared\Logs\User\sysmon.exe'" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2772
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\wininit.exe'" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:4704
      • C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\wininit.exe
        "C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\wininit.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3008
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2092
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • Delays execution with timeout.exe
            PID:1464
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2128
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • Delays execution with timeout.exe
            PID:4284
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4952
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • Delays execution with timeout.exe
            PID:3956
        • C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\wininit.exe
          "C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\wininit.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2176
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 1532
          4⤵
          • Program crash
          PID:3052
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2004 -s 1504
      2⤵
      • Program crash
      PID:4460
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2004 -ip 2004
    1⤵
      PID:3580
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3008 -ip 3008
      1⤵
        PID:5064

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            wininit.exe

            • Path C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\wininit.exe
            • Size 9.4MB
            • SHA256 0d5fa75218e5eb97fccbcf36d3bbd9cd77247260977f69c50deb29399ee0e464
            • MD5 SHA1 SHA512 SSDEEP

            memory/1844-6-0x0000000000400000-0x0000000000538000-memory.dmp

            memory/1844-7-0x0000000005D70000-0x0000000005DD6000-memory.dmp

            memory/1844-9-0x0000000006CC0000-0x0000000006D52000-memory.dmp

            memory/2004-0-0x000000007532E000-0x000000007532F000-memory.dmp

            memory/2004-1-0x0000000000B60000-0x00000000014BC000-memory.dmp

            memory/2004-2-0x0000000005EC0000-0x0000000005F5C000-memory.dmp

            memory/2004-3-0x000000000A060000-0x000000000A1A6000-memory.dmp

            memory/2004-4-0x0000000075320000-0x0000000075AD0000-memory.dmp

            memory/2004-5-0x000000000B0E0000-0x000000000B684000-memory.dmp

            memory/2004-8-0x0000000075320000-0x0000000075AD0000-memory.dmp