General

  • Target

    0x0008000000013a18-65.dat

  • Size

    535KB

  • Sample

    220604-x5ppsacgc7

  • MD5

    4d97786ab8047ad6c08532ed7a017573

  • SHA1

    a64d07233d813f9a085722295dca62ca726e291a

  • SHA256

    5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

  • SHA512

    9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

V/R/B

C2

siyatermi.duckdns.org:1518

Mutex

VNM_MUTEX_mJ6pCWZMe3OMOha5bj

Attributes
  • encryption_key

    g1Bi32PXFGwyBI9DJGTD

  • install_name

    Start Process.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Browser Module

  • subdirectory

    Sys Resources

Targets

    • Target

      0x0008000000013a18-65.dat

    • Size

      535KB

    • MD5

      4d97786ab8047ad6c08532ed7a017573

    • SHA1

      a64d07233d813f9a085722295dca62ca726e291a

    • SHA256

      5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

    • SHA512

      9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

    • Quasar Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

    • suricata: ET MALWARE Common RAT Connectivity Check Observed

      suricata: ET MALWARE Common RAT Connectivity Check Observed

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v6

Tasks