Analysis

  • max time kernel
    56s
  • max time network
    63s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2023, 06:38

General

  • Target

    Client-built.exe

  • Size

    502KB

  • MD5

    550176cfb9383aa88118ac710a2c6ec2

  • SHA1

    d2811a584bcfbaab1a288151f635cc04d43591c3

  • SHA256

    c42aab483df3e41b9c4e006cba50655b35606b565c80750637c5fe6aad3f90a6

  • SHA512

    a7d9f0f690724b0e385ffd518e9006c6d360f8e68ceec0226ce1ada746daceecf29ee2c79c873bbba2d96fd114fc4e502f004ce4c8e2b1d46249379818c6cf96

  • SSDEEP

    6144:VTEgdc0YvXAGbgiIN2RSBnnN+mKRv2F5Etqj+yw4YUcEnOb8F9h9t6QcPcTR32:VTEgdfYnbgDN+gk4KywyXpr9kQcPcd2

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

192.168.0.195:1604

Mutex

fffd6dc4-1f37-4e65-b7aa-0102dd3decf4

Attributes
  • encryption_key

    894D60DF1A73A828E12DB9DF734CD59FBE6522AB

  • 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1216

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1216-54-0x0000000000F70000-0x0000000000FF4000-memory.dmp

    Filesize

    528KB

  • memory/1216-55-0x000007FEFBF31000-0x000007FEFBF33000-memory.dmp

    Filesize

    8KB