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Analysis

  • max time kernel
    126s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    30/12/2024, 02:43

General

  • Target

    rbxfpsunlocker.exe

  • Size

    3.1MB

  • MD5

    09a5b059ce629f09d69e340065aeb553

  • SHA1

    6b6bff18c4452a25107210a6b59f298229e4ac95

  • SHA256

    ec46dd64a026223ff115efdc51fd486069607041025e89d51f25d112cf33b77e

  • SHA512

    ce94308bf44567e776e54606308089ddc3505c2cd1a8481d37ad128c6edfa1c2a9df418cb7865329ac1901e4c524d8c01042bd1471672a18721f2a9a25dab0bb

  • SSDEEP

    49152:Cvdt62XlaSFNWPjljiFa2RoUYIJeRJ6gbR3LoGdOTHHB72eh2NT:Cvf62XlaSFNWPjljiFXRoUYIJeRJ66

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

beamed

C2

192.168.203.82:4782

Mutex

3dad94cd-63f6-460a-a986-b1841d5dfefe

Attributes
  • encryption_key

    DE46F816EBC96DE37F9233DDE7709263C7680426

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    JavaUpdate

  • subdirectory

    SubDir

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 Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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\rbxfpsunlocker.exe
    "C:\Users\Admin\AppData\Local\Temp\rbxfpsunlocker.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "JavaUpdate" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2744
    • C:\Program Files\SubDir\Client.exe
      "C:\Program Files\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2800
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "JavaUpdate" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2988

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    09a5b059ce629f09d69e340065aeb553

    SHA1

    6b6bff18c4452a25107210a6b59f298229e4ac95

    SHA256

    ec46dd64a026223ff115efdc51fd486069607041025e89d51f25d112cf33b77e

    SHA512

    ce94308bf44567e776e54606308089ddc3505c2cd1a8481d37ad128c6edfa1c2a9df418cb7865329ac1901e4c524d8c01042bd1471672a18721f2a9a25dab0bb

  • memory/2316-0-0x000007FEF5A83000-0x000007FEF5A84000-memory.dmp

    Filesize

    4KB

  • memory/2316-1-0x0000000000270000-0x0000000000594000-memory.dmp

    Filesize

    3.1MB

  • memory/2316-2-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

    Filesize

    9.9MB

  • memory/2316-9-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

    Filesize

    9.9MB

  • memory/2800-8-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

    Filesize

    9.9MB

  • memory/2800-10-0x0000000000800000-0x0000000000B24000-memory.dmp

    Filesize

    3.1MB

  • memory/2800-11-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

    Filesize

    9.9MB

  • memory/2800-12-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

    Filesize

    9.9MB