Overview

overview

10

Static

static

10

Broker.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    145s
  • max time network
    154s
  • platform
    windows11-21h2_x64
  • resource
    win11-20231215-en
  • resource tags

    arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    11-02-2024 07:37

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General

  • Target

    Broker.exe

  • Size

    3.1MB

  • MD5

    4b9e68a7fe2d07b65c7181b8623f2faa

  • SHA1

    3b636fa355bca0c142f45dff6494ab4634c29ebe

  • SHA256

    9f4a5ea6fa9cbf7d164caad36430668f5edd3981f14cb229357f7fc662c0e1cb

  • SHA512

    daa00e6369ed6522a43dba37117382b4d31bde5e83dbcdb1e07e6ede281dd879c644351255508c1e5351d6d454dbe2b0a31a92a6bf0800626649052fcfbec2b6

  • SSDEEP

    49152:HvvI22SsaNYfdPBldt698dBcjH44GcBelSopd3aTHHB72eh2NT:Hvg22SsaNYfdPBldt6+dBcjHvGc

Score
10/10
quasarratpersistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Rat

C2

rate-ericsson.gl.at.ply.gg:29259

Mutex

b012b0da-9935-4804-afd4-9fa9d19767ac

Attributes
  • encryption_key

    CBFF95FA1927F9601F379BFD806C11D3B756D820

  • install_name

    Broker.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Broker

  • subdirectory

    Clint Broker

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

    persistence
  • 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 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\Broker.exe
    "C:\Users\Admin\AppData\Local\Temp\Broker.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1556
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn " Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Clint Broker\ Broker.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:3572
    • C:\Users\Admin\AppData\Roaming\Clint Broker\ Broker.exe
      "C:\Users\Admin\AppData\Roaming\Clint Broker\ Broker.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5692
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn " Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Clint Broker\ Broker.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:4100

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

System Information Discovery

1
T1082

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Clint Broker\ Broker.exe
    Filesize

    3.1MB

    MD5

    4b9e68a7fe2d07b65c7181b8623f2faa

    SHA1

    3b636fa355bca0c142f45dff6494ab4634c29ebe

    SHA256

    9f4a5ea6fa9cbf7d164caad36430668f5edd3981f14cb229357f7fc662c0e1cb

    SHA512

    daa00e6369ed6522a43dba37117382b4d31bde5e83dbcdb1e07e6ede281dd879c644351255508c1e5351d6d454dbe2b0a31a92a6bf0800626649052fcfbec2b6

    Download Submit
  • memory/1556-0-0x0000000000C70000-0x0000000000F94000-memory.dmp
    Filesize

    3.1MB

    Download
  • memory/1556-1-0x00007FFB99E90000-0x00007FFB9A952000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/1556-2-0x000000001BC40000-0x000000001BC50000-memory.dmp
    Filesize

    64KB

    Download
  • memory/1556-8-0x00007FFB99E90000-0x00007FFB9A952000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/5692-9-0x00007FFB99E90000-0x00007FFB9A952000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/5692-10-0x000000001B930000-0x000000001B940000-memory.dmp
    Filesize

    64KB

    Download
  • memory/5692-11-0x000000001C6B0000-0x000000001C700000-memory.dmp
    Filesize

    320KB

    Download
  • memory/5692-12-0x000000001C7C0000-0x000000001C872000-memory.dmp
    Filesize

    712KB

    Download
  • memory/5692-13-0x00007FFB99E90000-0x00007FFB9A952000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/5692-14-0x000000001B930000-0x000000001B940000-memory.dmp
    Filesize

    64KB

    Download