Overview

overview

10

Static

static

1

Uni.bat

windows10-1703-x64

10

Uni.bat

windows10-2004-x64

10

Uni.bat

windows11-21h2-x64

10

Sharing

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General

  • Target
    Uni.bat
  • Size 1003KB
  • Sample240529-rfaxfagg7t
  • SHA256 070f7c800e8278b2cad111635cec3c501ff0aa9aa93fdd9529fcb8736a06d56d
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasarseroxen | v3.1.5 |executionspywaretrojan

Malware Config

Extracted

Family

  • quasar

Attributes
  • reconnect_delay

    3000

Extracted

Family

  • quasar

Version

  • 3.1.5

Botnet

  • SeroXen | v3.1.5 |

C2

  • runderscore00-25501.portmap.host:25501

Mutex

  • $Sxr-jy6vh8CtEJL5ceZuIb

Attributes
  • encryption_key

    JCa22tR8WnO00adn2TuE

  • install_name

    $sxr-powershell.exe

  • log_directory

    $sxr-Logs

  • reconnect_delay

    3000

  • startup_key

    Powershell

  • subdirectory

    $sxr-seroxen2

Targets

    • Target
      Uni.bat
    • Size 1003KB
    • SHA256 070f7c800e8278b2cad111635cec3c501ff0aa9aa93fdd9529fcb8736a06d56d
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasarseroxen | v3.1.5 |executionspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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

    behavioral1behavioral2behavioral3

MITRE ATT&CK Enterprise v15

Tasks