Analysis

  • max time kernel
    50s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2023, 06:47

General

  • Target

    Client-built3.exe

  • Size

    502KB

  • MD5

    6b55f7d21263bb6aaa7fe11b99e837c1

  • SHA1

    bb935e24278d9766a26e5955cdca903aebf25bbc

  • SHA256

    02c09bb1b36334803c550b11e0886641a0861eecf07e39dacbe4d7d941a70a0b

  • SHA512

    9317b2d8ed858eef173a809befc0ee5c0fcf73ee2853bde1bdcecf84930b36fc2ce4e5fd555df66fad715ed2daafc8aa7a92623c03cf5b0eefde267e0ba45b98

  • SSDEEP

    6144:XTEgdc0YOXIX/ir/RKFrzdOwIOKZTR2b1zcEHtb8F94XPrxrRCTWPcTR37:XTEgdfYZ/iaznzXSerxGUcd7

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

127.0.0.1:1604

fe80::11bf:1ca6:fb14:329b%8 :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-built3.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built3.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1112

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1112-54-0x0000000000C60000-0x0000000000CE4000-memory.dmp

    Filesize

    528KB

  • memory/1112-55-0x000007FEFC2D1000-0x000007FEFC2D3000-memory.dmp

    Filesize

    8KB