Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    125s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    28-05-2024 23:09

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General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    d5e34b544737c509d2c715befcf13bbe

  • SHA1

    d32b3541f63a135cfb4cedda600641d34c4cb1ce

  • SHA256

    add949efc7c222e2a5c8189a56464384bd116eb05994f85891f1b57ecd570754

  • SHA512

    5f645abc822994f1615b7aa7c7e4a2dd3dc8c7d977792c82bf891629af65b81836d2c80268edcd2f80f798806744bfa09f6b2a08950d7c4e892e8ddc3a80e4e8

  • SSDEEP

    49152:rvHI22SsaNYfdPBldt698dBcjHnBhETidKoGdVvTHHB72eh2NT:rvo22SsaNYfdPBldt6+dBcjHnB6Tis

Score
10/10
quasarruntime brokerspywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Runtime Broker

C2

192.168.100.7:4449

Mutex

25995a9e-6e08-4214-8fe6-1aa44dc5c1d2

Attributes
  • encryption_key

    B34E98F6CCC5FEAE5629334642BF27F516AF7D4F

  • install_name

    Runtime Broker.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Runtime Broker

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar payload 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

    persistence
  • Modifies registry class 27 IoCs
  • Suspicious behavior: EnumeratesProcesses 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 54 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Runtime Broker.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2948
    • C:\Windows\system32\SubDir\Runtime Broker.exe
      "C:\Windows\system32\SubDir\Runtime Broker.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Runtime Broker.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2600
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:3008

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\System32\SubDir\Runtime Broker.exe
    Filesize

    3.1MB

    MD5

    d5e34b544737c509d2c715befcf13bbe

    SHA1

    d32b3541f63a135cfb4cedda600641d34c4cb1ce

    SHA256

    add949efc7c222e2a5c8189a56464384bd116eb05994f85891f1b57ecd570754

    SHA512

    5f645abc822994f1615b7aa7c7e4a2dd3dc8c7d977792c82bf891629af65b81836d2c80268edcd2f80f798806744bfa09f6b2a08950d7c4e892e8ddc3a80e4e8

    Download Submit

  • memory/1048-10-0x0000000000A40000-0x0000000000D64000-memory.dmp

    Filesize

    3.1MB

    Download

  • memory/1048-8-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1048-11-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1048-15-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1048-16-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/2316-2-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/2316-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp

    Filesize

    3.1MB

    Download

  • memory/2316-9-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/2316-0-0x000007FEF5223000-0x000007FEF5224000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3008-12-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

    Download

  • memory/3008-13-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

    Download

  • memory/3008-14-0x0000000002430000-0x0000000002440000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3008-17-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

    Download