Analysis

  • max time kernel
    102s
  • max time network
    114s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2023, 06:44

General

  • Target

    Client-built2.exe

  • Size

    502KB

  • MD5

    8ee866bbc61bc7a3000fbab1c5314612

  • SHA1

    346d9e84c288cb65dedd6166d001aa0dd1213aad

  • SHA256

    240f6135d5dad8a8f0003be5e08123d721f5d0ee94dadc46d6575956b54f72fc

  • SHA512

    78a1cc4965c000c90c9efde3e3017bfffb0b6543208fd3ede6244e8df2dc60e478e449b9b1ffb529b68c008c9894fa9022e68eb6a5b0479a00089678e72938b9

  • SSDEEP

    6144:cTEgdc0Y7X1uRabMR0FWnTDmPNLB65EtqI+yw4FUcEcOb8F9q0TCXyrcTR3K:cTEgdfYURaqTDIb4VywtspboyrcdK

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

192.168.0.195:1604

192.168.0.1:1604

46.212.113.82:1604

Mutex

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

Attributes
  • encryption_key

    894D60DF1A73A828E12DB9DF734CD59FBE6522AB

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    100

  • 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-built2.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built2.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:752

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/752-54-0x0000000000060000-0x00000000000E4000-memory.dmp

    Filesize

    528KB

  • memory/752-55-0x000007FEFC161000-0x000007FEFC163000-memory.dmp

    Filesize

    8KB