Analysis

  • max time kernel
    1034s
  • max time network
    1051s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-04-2024 22:50

General

  • Target

    RyansProject.exe

  • Size

    3.1MB

  • MD5

    20edba711349a03803c2f96bbbe18b39

  • SHA1

    675607f2c3510c35ea0784c1051e3a96c3b44416

  • SHA256

    8e3077a2601f2727d79389b445d9e90336a0055c0f5a7ce330cbd4006876f1f9

  • SHA512

    85130c87a19dc29bb6b6c26aea68f7173bf0df69c2a4b80e90bc2e14c19acdb1457f680e69d75c916fe7d546c470da5bb38b970843b33feda74847f5a675ee4e

  • SSDEEP

    49152:uvyI22SsaNYfdPBldt698dBcjHnk8wbR4LoGdfTHHB72eh2NT:uvf22SsaNYfdPBldt6+dBcjHnk83

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.226:4782

Mutex

aec627fa-aba4-45fa-a0fc-e456110a730a

Attributes
  • encryption_key

    7D414F9EC5601C94A757DDCDCF7C7A7809D8CFD0

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates scheduled task(s) 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 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\RyansProject.exe
    "C:\Users\Admin\AppData\Local\Temp\RyansProject.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4824
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:3012
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1528
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3716

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    20edba711349a03803c2f96bbbe18b39

    SHA1

    675607f2c3510c35ea0784c1051e3a96c3b44416

    SHA256

    8e3077a2601f2727d79389b445d9e90336a0055c0f5a7ce330cbd4006876f1f9

    SHA512

    85130c87a19dc29bb6b6c26aea68f7173bf0df69c2a4b80e90bc2e14c19acdb1457f680e69d75c916fe7d546c470da5bb38b970843b33feda74847f5a675ee4e

  • memory/1528-9-0x00007FF8C1DA0000-0x00007FF8C2861000-memory.dmp

    Filesize

    10.8MB

  • memory/1528-11-0x00000000032D0000-0x00000000032E0000-memory.dmp

    Filesize

    64KB

  • memory/1528-12-0x000000001BC20000-0x000000001BC70000-memory.dmp

    Filesize

    320KB

  • memory/1528-13-0x000000001DDE0000-0x000000001DE92000-memory.dmp

    Filesize

    712KB

  • memory/1528-14-0x00007FF8C1DA0000-0x00007FF8C2861000-memory.dmp

    Filesize

    10.8MB

  • memory/1528-15-0x00000000032D0000-0x00000000032E0000-memory.dmp

    Filesize

    64KB

  • memory/4824-0-0x0000000000470000-0x0000000000794000-memory.dmp

    Filesize

    3.1MB

  • memory/4824-1-0x00007FF8C1DA0000-0x00007FF8C2861000-memory.dmp

    Filesize

    10.8MB

  • memory/4824-2-0x000000001B500000-0x000000001B510000-memory.dmp

    Filesize

    64KB

  • memory/4824-10-0x00007FF8C1DA0000-0x00007FF8C2861000-memory.dmp

    Filesize

    10.8MB