General

  • Target
    BC8478F5CAA7B719234C8E1CF8395B12.exe
  • Size 10.7MB
  • Sample210620-13g2cn2bpa
  • SHA256 f5a558eba4843612e1b2e7bbfb431932a94bdc86f9411c0529f4216bcfe0ef02
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.0.0

Botnet
  • Office

C2
  • 5.61.62.193:5552

Mutex
  • yeGmQfVnPgbImyPaxF

Attributes
  • encryption_key

    NW9ZIW6yy48cx5RgKTcR

  • install_name

    csrss.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    NET framework

  • subdirectory

    SubDir

Targets

    • Target
      BC8478F5CAA7B719234C8E1CF8395B12.exe
    • Size 10.7MB
    • SHA256 f5a558eba4843612e1b2e7bbfb431932a94bdc86f9411c0529f4216bcfe0ef02
    • MD5 SHA1 SHA512
    • Quasar Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • RedLine Payload

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Drops startup file

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks