Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25/02/2024, 23:11

General

  • Target
    04a052321a1788c0130966758d1743f2.exe
  • Size 1.3MB
  • Sample240225-2586msfa63
  • SHA256 57d8aa5144b218e2f5932aa7dae64a40afd2219b6ce2859cd9f306151357039d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat 48 IoCs

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

  • Modifies WinLogon for persistence 2 TTPs 16 IoCs
  • Process spawned unexpected child process 48 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 32 IoCs
  • Drops file in Program Files directory 12 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 48 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 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\04a052321a1788c0130966758d1743f2.exe
    "C:\Users\Admin\AppData\Local\Temp\04a052321a1788c0130966758d1743f2.exe"
    1⤵
    • 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:1164
    • C:\Program Files\DVD Maker\audiodg.exe
      "C:\Program Files\DVD Maker\audiodg.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1232
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "04a052321a1788c0130966758d1743f20" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Cookies\04a052321a1788c0130966758d1743f2.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2700
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "04a052321a1788c0130966758d1743f2" /sc ONLOGON /tr "'C:\Users\Admin\Cookies\04a052321a1788c0130966758d1743f2.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2448
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "04a052321a1788c0130966758d1743f20" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Cookies\04a052321a1788c0130966758d1743f2.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2840
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 5 /tr "'C:\Users\Public\Libraries\winlogon.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2456
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Users\Public\Libraries\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2416
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Libraries\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2476
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\spoolsv.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2972
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\MSOCache\All Users\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1460
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2396
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files\MSBuild\Microsoft\csrss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2784
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2808
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files\MSBuild\Microsoft\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:324
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\smss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2924
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:676
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\sppsvc.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1660
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1844
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2472
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 12 /tr "'C:\Program Files\DVD Maker\audiodg.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1208
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Program Files\DVD Maker\audiodg.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1028
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 8 /tr "'C:\Program Files\DVD Maker\audiodg.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1344
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\spoolsv.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:620
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1108
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2740
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Windows\Microsoft.NET\assembly\GAC_32\System.Web\dllhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1756
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\Microsoft.NET\assembly\GAC_32\System.Web\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1812
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Windows\Microsoft.NET\assembly\GAC_32\System.Web\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:772
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\Idle.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:800
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\MSOCache\All Users\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1776
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1480
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\wininit.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2508
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\wininit.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2156
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Recovery\52b0f462-d10e-11ee-9e98-caf795fd2ae4\wininit.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2068
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\PrintHood\spoolsv.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2084
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Admin\PrintHood\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2096
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\PrintHood\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1872
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\taskhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1824
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1792
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2304
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Defender\explorer.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:436
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\explorer.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2316
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Defender\explorer.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1772
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Portable Devices\Idle.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2248
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Portable Devices\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1116
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\smss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2016
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2040
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:956

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        smss.exe

        • Path C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\smss.exe
        • Size 1.3MB
        • SHA256 57d8aa5144b218e2f5932aa7dae64a40afd2219b6ce2859cd9f306151357039d
        • MD5 SHA1 SHA512 SSDEEP

        memory/1164-8-0x0000000000560000-0x0000000000568000-memory.dmp

        memory/1164-51-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

        memory/1164-3-0x00000000001C0000-0x00000000001DC000-memory.dmp

        memory/1164-4-0x00000000001E0000-0x00000000001F6000-memory.dmp

        memory/1164-5-0x0000000000200000-0x0000000000212000-memory.dmp

        memory/1164-6-0x0000000000540000-0x000000000054E000-memory.dmp

        memory/1164-2-0x0000000002030000-0x00000000020B0000-memory.dmp

        memory/1164-7-0x0000000000550000-0x0000000000558000-memory.dmp

        memory/1164-1-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

        memory/1164-0-0x0000000000930000-0x0000000000A84000-memory.dmp

        memory/1232-49-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

        memory/1232-48-0x0000000000F70000-0x00000000010C4000-memory.dmp

        memory/1232-50-0x000000001B090000-0x000000001B110000-memory.dmp

        memory/1232-52-0x0000000000210000-0x0000000000222000-memory.dmp

        memory/1232-53-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

        memory/1232-54-0x000000001B090000-0x000000001B110000-memory.dmp