Analysis

  • max time kernel
    93s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-04-2024 02:50

General

  • Target

    a681774e83e773eff9e6c4070a78b7fdb2839301ce1955cade51bd95af25abd3.exe

  • Size

    348KB

  • MD5

    32f3cadcabd40f0b821adba034ac8fb1

  • SHA1

    75ec24a7b088756120b9c380c6a13d88dbab5bd6

  • SHA256

    a681774e83e773eff9e6c4070a78b7fdb2839301ce1955cade51bd95af25abd3

  • SHA512

    a59aae78bf7729881925fdea3f0c2370a26f3bc3ea665df3eca1278c3599d37369aaf1e5c3bc5dcf08acb02a80ba1e1f4883b855ce934908a95d1d3d4c448c40

  • SSDEEP

    6144:TzNHXf500Mb31d61sQqboCixEkZeg5kEvfmG:Hd50vd0IixDp1vfmG

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

ppprosyl.con-ip.com:4001

Mutex

QSR_MUTEX_l1M93VuqIyiH8hEQ4I

Attributes
  • encryption_key

    ucnCWAxHFqrqDWqAvywj

  • 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\a681774e83e773eff9e6c4070a78b7fdb2839301ce1955cade51bd95af25abd3.exe
    "C:\Users\Admin\AppData\Local\Temp\a681774e83e773eff9e6c4070a78b7fdb2839301ce1955cade51bd95af25abd3.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1524

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1524-0-0x0000000000680000-0x00000000006DE000-memory.dmp

    Filesize

    376KB

  • memory/1524-1-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/1524-2-0x00000000055E0000-0x0000000005B84000-memory.dmp

    Filesize

    5.6MB

  • memory/1524-3-0x0000000005030000-0x00000000050C2000-memory.dmp

    Filesize

    584KB

  • memory/1524-4-0x0000000004EE0000-0x0000000004EF0000-memory.dmp

    Filesize

    64KB

  • memory/1524-5-0x0000000004FA0000-0x0000000005006000-memory.dmp

    Filesize

    408KB

  • memory/1524-6-0x0000000005CB0000-0x0000000005CC2000-memory.dmp

    Filesize

    72KB

  • memory/1524-7-0x00000000061F0000-0x000000000622C000-memory.dmp

    Filesize

    240KB

  • memory/1524-8-0x0000000006930000-0x000000000693A000-memory.dmp

    Filesize

    40KB

  • memory/1524-9-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/1524-10-0x0000000004EE0000-0x0000000004EF0000-memory.dmp

    Filesize

    64KB