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Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230703-en
  • resource tags

    arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
  • submitted
    09/07/2023, 11:00

General

  • Target

    16888128718a66611c1d86e12.exe

  • Size

    348KB

  • MD5

    7834a7e88c159e7f55934c740ca39935

  • SHA1

    c5a4dcd4454df284e95472a972511c2488bd79ac

  • SHA256

    b8eda4e9e691fe7017981cea833b63299ea6b89e08f3995b630cf705a393d16b

  • SHA512

    2c3f4f70cb898eb6fafa60b8f55301ef4b3c1918c527bec6f8721c5146c4affef28bdabda991fdb799df78dc74d70af7d57989fb00dcb787e23a42ee851b4b7d

  • SSDEEP

    6144:r2NHXf500MRWfu7waMmbUIgiWebh4OIqppWH5t5BW:yd50Ku8bNOSqpgH5/BW

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

qrss.duckdns.org:54790

Mutex

QSR_MUTEX_zlSKJvcuVjgb1gOk4J

Attributes
  • encryption_key

    vUOWxZSgsTmyyUM9Rgsw

  • 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 2 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\16888128718a66611c1d86e12.exe
    "C:\Users\Admin\AppData\Local\Temp\16888128718a66611c1d86e12.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2324

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2324-54-0x0000000000D90000-0x0000000000DEE000-memory.dmp

    Filesize

    376KB

  • memory/2324-55-0x0000000004970000-0x00000000049B0000-memory.dmp

    Filesize

    256KB

  • memory/2324-57-0x0000000004970000-0x00000000049B0000-memory.dmp

    Filesize

    256KB