General

  • Target

    x.hta

  • Size

    7KB

  • Sample

    230207-ve6jhacg35

  • MD5

    7a5fd24f27540d68f96bc72ed413f215

  • SHA1

    de5df002413d73f6b4ccbf62ae41f83ecdef44d5

  • SHA256

    bc74932f267e68a7a1bb770d7d50b001b61e1aeef0382b648e6142fb31acb3fe

  • SHA512

    d3823e32fc7b6b10c4ab8627fa6753430ac19c2348d000f421707e84fb905b5a340114efefddfe12a4714a9a566d1ee71f55c0aeb0849c3b5182d8b633db3445

  • SSDEEP

    96:tulyZc/zRqwwPQDNpTOyXCiLTqQpNZdkIMjwFaR6nwQlVzIEzKOPmi:y/z85oDNpT1LTqQjMDAfkEzKOPmi

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

requiredhome.ru:3042

Mutex

QSR_MUTEX_sDbanf3bIc7d4Or0Vk

Attributes
  • encryption_key

    lzkaGXX9PqnE3GnlX6CW

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      x.hta

    • Size

      7KB

    • MD5

      7a5fd24f27540d68f96bc72ed413f215

    • SHA1

      de5df002413d73f6b4ccbf62ae41f83ecdef44d5

    • SHA256

      bc74932f267e68a7a1bb770d7d50b001b61e1aeef0382b648e6142fb31acb3fe

    • SHA512

      d3823e32fc7b6b10c4ab8627fa6753430ac19c2348d000f421707e84fb905b5a340114efefddfe12a4714a9a566d1ee71f55c0aeb0849c3b5182d8b633db3445

    • SSDEEP

      96:tulyZc/zRqwwPQDNpTOyXCiLTqQpNZdkIMjwFaR6nwQlVzIEzKOPmi:y/z85oDNpT1LTqQjMDAfkEzKOPmi

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Blocklisted process makes network request

    • Registers COM server for autorun

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks