Overview

overview

10

Static

static

1

Uni.bat

windows10-ltsc_2021-x64

10

Uni.bat

windows11-21h2-x64

10

Sharing

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General

  • Target
    Uni.bat
  • Size 10.1MB
  • Sample260528-dd219aes7k
  • SHA256 3af5f9e385e259a669eacaa2c66850b127bad6aebdf0776ee8083d1de27c557b
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasarseroxendefense_evasiondiscoveryexecutionpersistencespywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 15.5.0

Botnet

  • SeroXen

C2

  • 127.0.0.1:1414

Mutex

  • 43778e33-6e95-4120-85f8-de7b6beca9a7

Attributes
  • encryption_key

    1DB1C75433B0814D6A687DC846553894FE0103F0

  • install_name

    $sxr-cmd.bat

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    $Sxr-logs

  • reconnect_delay

    3000

  • startup_key

    $sxr-seroxen

  • subdirectory

    $sxr-seroxen1

Targets

    • Target
      Uni.bat
    • Size 10.1MB
    • SHA256 3af5f9e385e259a669eacaa2c66850b127bad6aebdf0776ee8083d1de27c557b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    seroxendefense_evasiondiscoveryexecutionquasarpersistencespywarestealertrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

      defense_evasion

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Obfuscated Files or Information

1
T1027

Command Obfuscation

1
T1027.010

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

Remote System Discovery

1
T1018

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks