Analysis

  • max time kernel
    117s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    26-07-2024 01:23

General

  • Target

    09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694.exe

  • Size

    3.3MB

  • MD5

    bc2d438a68d814ce5df1af0dd02ada11

  • SHA1

    fc029395beb053a35f3a3dbaefd22a7e5235360a

  • SHA256

    09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694

  • SHA512

    a87043218f4dd403990ce02c7b5aa6f62adcba3046eb67bb50db477cd8d7ad4ec2875ff165a04fe5e0798f7a687ee144fbc80aa8a7f175f287b06b931552298d

  • SSDEEP

    49152:o8xhCcpCNPulYCFckZHvEdM1jegx7oOCM1Gn72tESduILWMJd33eRkX2EuFgtDGg:NhrChV+cU/NeBPMY72tRR0EuUG

Malware Config

Signatures

  • DcRat 32 IoCs

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

  • Modifies WinLogon for persistence 2 TTPs 10 IoCs
  • Process spawned unexpected child process 30 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 20 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Drops file in Program Files directory 12 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 30 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694.exe
    "C:\Users\Admin\AppData\Local\Temp\09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694.exe"
    1⤵
    • DcRat
    • Modifies WinLogon for persistence
    • UAC bypass
    • Loads dropped DLL
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2376
    • C:\Windows\TAPI\wininit.exe
      "C:\Windows\TAPI\wininit.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • System policy modification
      PID:1032
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 13 /tr "'C:\Program Files\Google\Chrome\Application\audiodg.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2844
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\audiodg.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2872
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 6 /tr "'C:\Program Files\Google\Chrome\Application\audiodg.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2752
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\Recent\services.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2612
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Admin\Recent\services.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2896
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Recent\services.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2880
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Cookies\lsm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2772
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Users\Default\Cookies\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2660
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Cookies\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2600
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Windows\TAPI\wininit.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\TAPI\wininit.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2988
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Windows\TAPI\wininit.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3000
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\csrss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1852
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1736
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1048
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 10 /tr "'C:\Recovery\2b7a8ca2-3d6d-11ef-81ce-f2a3cf4ad94f\taskhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1740
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\2b7a8ca2-3d6d-11ef-81ce-f2a3cf4ad94f\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 13 /tr "'C:\Recovery\2b7a8ca2-3d6d-11ef-81ce-f2a3cf4ad94f\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:292
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c6940" /sc MINUTE /mo 7 /tr "'C:\Program Files\Java\09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1052
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694" /sc ONLOGON /tr "'C:\Program Files\Java\09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c6940" /sc MINUTE /mo 14 /tr "'C:\Program Files\Java\09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1636
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\Idle.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1892
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:568
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Recovery\2b7a8ca2-3d6d-11ef-81ce-f2a3cf4ad94f\dllhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1652
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\2b7a8ca2-3d6d-11ef-81ce-f2a3cf4ad94f\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2672
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Recovery\2b7a8ca2-3d6d-11ef-81ce-f2a3cf4ad94f\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\ja\wininit.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2312
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\ja\wininit.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2212
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\ja\wininit.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2700

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\csrss.exe

    Filesize

    3.3MB

    MD5

    bc2d438a68d814ce5df1af0dd02ada11

    SHA1

    fc029395beb053a35f3a3dbaefd22a7e5235360a

    SHA256

    09c0c134cbc01a50cc2f9c05504480cb2e1f1a0139d3372e6fe0a22aeff4c694

    SHA512

    a87043218f4dd403990ce02c7b5aa6f62adcba3046eb67bb50db477cd8d7ad4ec2875ff165a04fe5e0798f7a687ee144fbc80aa8a7f175f287b06b931552298d

  • memory/1032-65-0x0000000000BB0000-0x0000000001188000-memory.dmp

    Filesize

    5.8MB

  • memory/1032-62-0x0000000000BB0000-0x0000000001188000-memory.dmp

    Filesize

    5.8MB

  • memory/1032-61-0x0000000000BB0000-0x0000000001188000-memory.dmp

    Filesize

    5.8MB

  • memory/1032-60-0x0000000000BB0000-0x0000000001188000-memory.dmp

    Filesize

    5.8MB

  • memory/2376-12-0x0000000002850000-0x000000000285C000-memory.dmp

    Filesize

    48KB

  • memory/2376-14-0x0000000002880000-0x000000000288E000-memory.dmp

    Filesize

    56KB

  • memory/2376-7-0x0000000000D60000-0x0000000000D76000-memory.dmp

    Filesize

    88KB

  • memory/2376-8-0x0000000000AA0000-0x0000000000AA8000-memory.dmp

    Filesize

    32KB

  • memory/2376-9-0x0000000000D90000-0x0000000000D9A000-memory.dmp

    Filesize

    40KB

  • memory/2376-10-0x0000000000DF0000-0x0000000000E46000-memory.dmp

    Filesize

    344KB

  • memory/2376-11-0x0000000002840000-0x000000000284C000-memory.dmp

    Filesize

    48KB

  • memory/2376-0-0x0000000000E50000-0x0000000001428000-memory.dmp

    Filesize

    5.8MB

  • memory/2376-13-0x0000000002870000-0x0000000002878000-memory.dmp

    Filesize

    32KB

  • memory/2376-6-0x0000000000A00000-0x0000000000A10000-memory.dmp

    Filesize

    64KB

  • memory/2376-17-0x00000000744E0000-0x0000000074BCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2376-5-0x0000000000470000-0x0000000000478000-memory.dmp

    Filesize

    32KB

  • memory/2376-57-0x000000000A1E0000-0x000000000A7B8000-memory.dmp

    Filesize

    5.8MB

  • memory/2376-54-0x000000000A1E0000-0x000000000A7B8000-memory.dmp

    Filesize

    5.8MB

  • memory/2376-58-0x0000000000E50000-0x0000000001428000-memory.dmp

    Filesize

    5.8MB

  • memory/2376-4-0x0000000000450000-0x000000000046C000-memory.dmp

    Filesize

    112KB

  • memory/2376-59-0x00000000744E0000-0x0000000074BCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2376-3-0x00000000744E0000-0x0000000074BCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2376-2-0x0000000000E50000-0x0000000001428000-memory.dmp

    Filesize

    5.8MB

  • memory/2376-1-0x00000000744EE000-0x00000000744EF000-memory.dmp

    Filesize

    4KB