Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    20-06-2024 08:31

General

  • Target

    33ab5cbb351fa75f5d4f3e3b5aa064a9.exe

  • Size

    827KB

  • MD5

    33ab5cbb351fa75f5d4f3e3b5aa064a9

  • SHA1

    ac9bcf69aecff1ff5d4108df204a4a2b572e1eef

  • SHA256

    2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17

  • SHA512

    4e62650b49ae86c152463742a04980627d54dc8efc7dd3443625210d13db815f279989d846bbca4376cd127595403cfd53160c0fa78f3d198bf400da5655a98e

  • SSDEEP

    12288:6HggW+CSPHjaphInx+6XlRitt/tNRWCkQu:6AgW+C4jaqZlR4/jRWCkT

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 39 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
  • Drops file in Program Files directory 14 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 39 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 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\33ab5cbb351fa75f5d4f3e3b5aa064a9.exe
    "C:\Users\Admin\AppData\Local\Temp\33ab5cbb351fa75f5d4f3e3b5aa064a9.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1728
    • C:\Program Files (x86)\Windows Defender\ja-JP\csrss.exe
      "C:\Program Files (x86)\Windows Defender\ja-JP\csrss.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\taskhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2704
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2744
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2664
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\sppsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2800
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2768
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 5 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2840
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2624
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\MSOCache\All Users\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2512
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2544
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3056
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2564
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:816
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Program Files\Microsoft Games\Chess\fr-FR\dllhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2824
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Microsoft Games\Chess\fr-FR\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2808
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Microsoft Games\Chess\fr-FR\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Windows\addins\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2932
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\addins\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:328
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Windows\addins\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1052
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Users\Default\NetHood\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Default\NetHood\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:492
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Users\Default\NetHood\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2020
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\services.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1796
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2180
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2600
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Defender\ja-JP\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1560
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\ja-JP\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2348
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Defender\ja-JP\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Program Files\Uninstall Information\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1200
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1512
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Program Files\Uninstall Information\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1252
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Mail\it-IT\lsm.exe'" /f
    1⤵
    • 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:\Program Files (x86)\Windows Mail\it-IT\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2112
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Mail\it-IT\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2896
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Media Player\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:852
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:588
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Media Player\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:480
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\50341a82-0d88-11ef-8a7e-5aba25856535\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1268
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\50341a82-0d88-11ef-8a7e-5aba25856535\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1160
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Recovery\50341a82-0d88-11ef-8a7e-5aba25856535\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2028

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files\Microsoft Games\Chess\fr-FR\dllhost.exe
    Filesize

    827KB

    MD5

    33ab5cbb351fa75f5d4f3e3b5aa064a9

    SHA1

    ac9bcf69aecff1ff5d4108df204a4a2b572e1eef

    SHA256

    2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17

    SHA512

    4e62650b49ae86c152463742a04980627d54dc8efc7dd3443625210d13db815f279989d846bbca4376cd127595403cfd53160c0fa78f3d198bf400da5655a98e

  • memory/1716-35-0x0000000000EB0000-0x0000000000F86000-memory.dmp
    Filesize

    856KB

  • memory/1728-0-0x000007FEF5D03000-0x000007FEF5D04000-memory.dmp
    Filesize

    4KB

  • memory/1728-1-0x0000000001030000-0x0000000001106000-memory.dmp
    Filesize

    856KB

  • memory/1728-2-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp
    Filesize

    9.9MB

  • memory/1728-36-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp
    Filesize

    9.9MB