Analysis

  • max time kernel
    127s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2024 01:20

General

  • Target

    498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964.exe

  • Size

    348KB

  • MD5

    b12dcc0b6399196333d30649f325397f

  • SHA1

    6f208c9b6d3dae57e4c22d5e319db0d237feb909

  • SHA256

    498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964

  • SHA512

    f7e1cd332733a28636439775e501870b5a9d90899357ee27ed51a647c15be614bcdbcfc5acef7fc0b3085ecca2a45eb1496ec88e26cfe6e08c9b4c2bf6198146

  • SSDEEP

    6144:67qQ4i1FFiEKyK5ALbddCEaBHGdNXUnO:8plipKddGIdBUnO

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

companinuevoano1.con-ip.com:4782

Mutex

QSR_MUTEX_l1M93VuqIyiH8hEQ4I

Attributes
  • encryption_key

    rFxyS0ilcLEI1ldtBJAu

  • 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 1 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 1 IoCs
  • Detects executables containing common artifacts observed in infostealers 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964.exe
    "C:\Users\Admin\AppData\Local\Temp\498844e96c76ce422fdb328f5deadd5e0785582cf291c1cf9d32ed15f45fa964.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3260

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3260-1-0x0000000074AC0000-0x0000000075270000-memory.dmp

    Filesize

    7.7MB

  • memory/3260-0-0x0000000000760000-0x00000000007BE000-memory.dmp

    Filesize

    376KB

  • memory/3260-2-0x00000000057B0000-0x0000000005D54000-memory.dmp

    Filesize

    5.6MB

  • memory/3260-3-0x0000000005200000-0x0000000005292000-memory.dmp

    Filesize

    584KB

  • memory/3260-4-0x00000000053C0000-0x00000000053D0000-memory.dmp

    Filesize

    64KB

  • memory/3260-5-0x00000000052A0000-0x0000000005306000-memory.dmp

    Filesize

    408KB

  • memory/3260-6-0x0000000005730000-0x0000000005742000-memory.dmp

    Filesize

    72KB

  • memory/3260-7-0x0000000006420000-0x000000000645C000-memory.dmp

    Filesize

    240KB

  • memory/3260-8-0x0000000074AC0000-0x0000000075270000-memory.dmp

    Filesize

    7.7MB

  • memory/3260-9-0x00000000065D0000-0x00000000065DA000-memory.dmp

    Filesize

    40KB

  • memory/3260-10-0x00000000053C0000-0x00000000053D0000-memory.dmp

    Filesize

    64KB