Overview

overview

10

Static

static

1

$sxr-Uni2.bat

windows10-1703-x64

10

$sxr-Uni2.bat

windows10-2004-x64

8

$sxr-Uni2.bat

windows11-21h2-x64

10

Sharing

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General

  • Target

    $sxr-Uni2.bat

  • Size

    796KB

  • Sample

    240531-2f92msgf95

  • MD5

    03137a8d9aaa39d4266d6cafecc5ccb2

  • SHA1

    65ab5f05615d7aeb12a8f64f2339af341172784d

  • SHA256

    7fca260b4dbeac5ef0255577b3502e6658ca6661f80ad9583673f656c3e67a64

  • SHA512

    a950fe4fcee799aec313c08dc93535f0af463ab3953fb054288230ed30099ff98de5e12a6485e35a11a90a1f41c3043f5270274d29de7ed25c98356015084226

  • SSDEEP

    12288:sJOiyoo1m8Y8HvatsI8a0XNQ7UCPWa/9SC+KSXs+kYWjJ4rT+/mq6z4Q4uatxyG:sciyK8YzJ8BwUCPTwC+KysEWjG+D6l4b

Score
10/10
quasarslaveexecutionspywaretrojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

Slave

C2

127.0.0.1:4782

Mutex

$Sxr-mRtuuIZppUEbmX171W

Attributes
  • encryption_key

    s5xN6p335pnxD0WJMnnQ

  • install_name

    $sxr-powershell.exe

  • log_directory

    $sxr-Logs

  • reconnect_delay

    3000

  • startup_key

    Powershell

  • subdirectory

    $sxr-seroxen2

Targets

    • Target

      $sxr-Uni2.bat

    • Size

      796KB

    • MD5

      03137a8d9aaa39d4266d6cafecc5ccb2

    • SHA1

      65ab5f05615d7aeb12a8f64f2339af341172784d

    • SHA256

      7fca260b4dbeac5ef0255577b3502e6658ca6661f80ad9583673f656c3e67a64

    • SHA512

      a950fe4fcee799aec313c08dc93535f0af463ab3953fb054288230ed30099ff98de5e12a6485e35a11a90a1f41c3043f5270274d29de7ed25c98356015084226

    • SSDEEP

      12288:sJOiyoo1m8Y8HvatsI8a0XNQ7UCPWa/9SC+KSXs+kYWjJ4rT+/mq6z4Q4uatxyG:sciyK8YzJ8BwUCPTwC+KysEWjG+D6l4b

    Score
    10/10
    quasarslaveexecutionspywaretrojan

    • 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

    • 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 Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks