Analysis

  • max time kernel
    120s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    05-10-2023 17:31

General

  • Target

    8bbf013e1a095f5841b572e0aadc6c3929533b2332620fa470fe5e744b828b91exe_JC.exe

  • Size

    348KB

  • MD5

    19ec1b3fe77ac2bb9b4019ecf20cfc5b

  • SHA1

    cc3c5fdc6a454955d1c5158a42d668abf616e748

  • SHA256

    8bbf013e1a095f5841b572e0aadc6c3929533b2332620fa470fe5e744b828b91

  • SHA512

    5e27fa7c9389b897be5554e8d4396e5bc8b604336816fc6d0b8349059d9de6be19bacdc31d2b01786782ca6480343e841d856f2136850ea41cf87fdbde00b664

  • SSDEEP

    6144:b2NHXf500M7fN3hDQorkb3aUQ0gdsx9+I6WGldC:id50xl3hcymQbsH+pWG3C

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

NEWDNS

C2

usacupid.org:3000

Mutex

QSR_MUTEX_bLYoix0mh2BfR5APqy

Attributes
  • encryption_key

    mkNVRqiQw8yay6GT5859

  • 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
  • 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
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8bbf013e1a095f5841b572e0aadc6c3929533b2332620fa470fe5e744b828b91exe_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\8bbf013e1a095f5841b572e0aadc6c3929533b2332620fa470fe5e744b828b91exe_JC.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2224

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2224-0-0x0000000001020000-0x000000000107E000-memory.dmp

    Filesize

    376KB

  • memory/2224-1-0x0000000074D50000-0x000000007543E000-memory.dmp

    Filesize

    6.9MB

  • memory/2224-2-0x0000000000650000-0x0000000000690000-memory.dmp

    Filesize

    256KB

  • memory/2224-4-0x0000000074D50000-0x000000007543E000-memory.dmp

    Filesize

    6.9MB

  • memory/2224-5-0x0000000000650000-0x0000000000690000-memory.dmp

    Filesize

    256KB