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Analysis

  • max time kernel
    149s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2025, 10:53

General

  • Target

    CandyDDoser-installer x32.exe

  • Size

    3.1MB

  • MD5

    b020b1f73c110300f25ae110b3dd59df

  • SHA1

    8bfa300b77c9c3e302001311d88568d816c590ae

  • SHA256

    ab7f57812dcc2c9ddd51aa06afdbc083d6f42dc8a4d1a9f2ab91bcee9722fef3

  • SHA512

    98047f3bab00b4c4d6a3a23c0d31c7940328a8d6d1cfed1173ead3b094fc95ba18f57729a75045f9d5c7a8e5c1e9496f12617efc7a370a75e6c87b25455b9339

  • SSDEEP

    49152:/v7I22SsaNYfdPBldt698dBcjHQ0lRJ61bR3LoGdL1THHB72eh2NTz:/vE22SsaNYfdPBldt6+dBcjHQ0lRJ6H

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CandyDDoser-Installer

C2

127.0.0.1:5656

Mutex

a4451484-07b3-4077-bce4-aad7f3859a48

Attributes
  • encryption_key

    0BF10FE69CA9AD8F67C8185E9EEB25C381EB6210

  • install_name

    system32remove.exe

  • log_directory

    Logs

  • reconnect_delay

    10

  • startup_key

    system32

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 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\CandyDDoser-installer x32.exe
    "C:\Users\Admin\AppData\Local\Temp\CandyDDoser-installer x32.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1732
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "system32" /sc ONLOGON /tr "C:\Windows\system32\Windows\system32remove.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2516
    • C:\Windows\system32\Windows\system32remove.exe
      "C:\Windows\system32\Windows\system32remove.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3056
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "system32" /sc ONLOGON /tr "C:\Windows\system32\Windows\system32remove.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2796

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\System32\Windows\system32remove.exe

    Filesize

    3.1MB

    MD5

    b020b1f73c110300f25ae110b3dd59df

    SHA1

    8bfa300b77c9c3e302001311d88568d816c590ae

    SHA256

    ab7f57812dcc2c9ddd51aa06afdbc083d6f42dc8a4d1a9f2ab91bcee9722fef3

    SHA512

    98047f3bab00b4c4d6a3a23c0d31c7940328a8d6d1cfed1173ead3b094fc95ba18f57729a75045f9d5c7a8e5c1e9496f12617efc7a370a75e6c87b25455b9339

  • memory/1732-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

    Filesize

    4KB

  • memory/1732-1-0x00000000011C0000-0x00000000014E8000-memory.dmp

    Filesize

    3.2MB

  • memory/1732-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

    Filesize

    9.9MB

  • memory/1732-8-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

    Filesize

    9.9MB

  • memory/3056-10-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

    Filesize

    9.9MB

  • memory/3056-9-0x0000000000120000-0x0000000000448000-memory.dmp

    Filesize

    3.2MB

  • memory/3056-11-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

    Filesize

    9.9MB

  • memory/3056-12-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

    Filesize

    9.9MB

  • memory/3056-13-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

    Filesize

    9.9MB