Analysis

  • max time kernel
    131s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 14:03

General

  • Target

    83892117f96867db66c1e6676822a4c0d6691cde60449ee47457f4cc31410fce.exe

  • Size

    348KB

  • MD5

    0a7dccc3c8dd419560ac4bdb8440b77a

  • SHA1

    74a2fe4ca4888ac962b1737af6dc2b58f78048c7

  • SHA256

    83892117f96867db66c1e6676822a4c0d6691cde60449ee47457f4cc31410fce

  • SHA512

    637b9a964954b52986eea5fecc4093ac57f7bff690220bc0f0785c043d327259ba2c372b2c0fba1ec5588fc66bda593009fb8f74b3915fc3561e7fda9b92787c

  • SSDEEP

    6144:+rNHXf500MsbudVpDxWUb2Nsto/pKujjY/R3K:Yd505dVyrsWMuvYZ3K

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

qztadmin.duckdns.org:9782

Mutex

QSR_MUTEX_YMblzlA3rm38L7nnxQ

Attributes
  • encryption_key

    mDf8ODHd9XwqMsIxpY8F

  • 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\83892117f96867db66c1e6676822a4c0d6691cde60449ee47457f4cc31410fce.exe
    "C:\Users\Admin\AppData\Local\Temp\83892117f96867db66c1e6676822a4c0d6691cde60449ee47457f4cc31410fce.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:1648

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1648-0-0x00000000011E0000-0x000000000123E000-memory.dmp

    Filesize

    376KB

  • memory/1648-1-0x0000000074D50000-0x000000007543E000-memory.dmp

    Filesize

    6.9MB

  • memory/1648-2-0x0000000000C20000-0x0000000000C60000-memory.dmp

    Filesize

    256KB

  • memory/1648-4-0x0000000074D50000-0x000000007543E000-memory.dmp

    Filesize

    6.9MB

  • memory/1648-5-0x0000000000C20000-0x0000000000C60000-memory.dmp

    Filesize

    256KB