Analysis

  • max time kernel
    122s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    16-05-2024 01:00

General

  • Target

    00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.exe

  • Size

    828KB

  • MD5

    1b8dc013de93bb0edf121b38e7f8ab6f

  • SHA1

    2c17ada00c2b779f5e04a801265f151591e11e18

  • SHA256

    00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c

  • SHA512

    4b23622774ea394608ade50bac520aebd64788d626e9fc316e57db8f4a4628cec221420955adae70d7ddcd7c273f6cac409d64f931e01e1a490b275788370d33

  • SSDEEP

    12288:K8rQgxfLc/EHk/2Wk3D0bdxTZiLaO4Vb/5:VrzxfLFkHbXdVLVb/5

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 15 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 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 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\00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.exe
    "C:\Users\Admin\AppData\Local\Temp\00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.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:2740
    • C:\Users\All Users\csrss.exe
      "C:\Users\All Users\csrss.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:828
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Windows\IME\es-ES\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2632
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\IME\es-ES\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2532
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Windows\IME\es-ES\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1148
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 13 /tr "'C:\Users\Public\Libraries\taskhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2604
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\Public\Libraries\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2464
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\Users\Public\Libraries\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2572
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2600
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\All Users\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2376
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2420
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files\Java\Idle.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2864
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Java\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2100
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files\Java\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:880
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c0" /sc MINUTE /mo 8 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1672
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c" /sc ONLOGON /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1664
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c0" /sc MINUTE /mo 9 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2160

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c.exe

    Filesize

    828KB

    MD5

    1b8dc013de93bb0edf121b38e7f8ab6f

    SHA1

    2c17ada00c2b779f5e04a801265f151591e11e18

    SHA256

    00126f1a772fd459793f811457950e42177537f6387a76124d26b57266a79f1c

    SHA512

    4b23622774ea394608ade50bac520aebd64788d626e9fc316e57db8f4a4628cec221420955adae70d7ddcd7c273f6cac409d64f931e01e1a490b275788370d33

  • memory/828-19-0x0000000000C10000-0x0000000000CE6000-memory.dmp

    Filesize

    856KB

  • memory/2740-0-0x000007FEF6023000-0x000007FEF6024000-memory.dmp

    Filesize

    4KB

  • memory/2740-1-0x00000000011A0000-0x0000000001276000-memory.dmp

    Filesize

    856KB

  • memory/2740-2-0x000007FEF6020000-0x000007FEF6A0C000-memory.dmp

    Filesize

    9.9MB

  • memory/2740-20-0x000007FEF6020000-0x000007FEF6A0C000-memory.dmp

    Filesize

    9.9MB