Overview

overview

10

Static

static

3

RblxExecutor.exe

windows7-x64

9

RblxExecutor.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    RblxExecutor.exe

  • Size

    1.6MB

  • Sample

    240522-xbe89acd77

  • MD5

    3a235f7f491d95d4727320239c0b4cb7

  • SHA1

    b66d02b69f9d2cf011164406c6bc93a6728a65eb

  • SHA256

    e9397b42b5c3f7770b873a76355bd59cbe097f30dc9b9349e9787832bbe9767a

  • SHA512

    fa40f2d94bbe25372fc5eecb87168c3a55fb3fff1486ebd57d1f944760b43cc77a891fdbc246d5379e02b88b7f4f6abea0c94162e88ff87cabd246c7d8a5d83b

  • SSDEEP

    24576:O83AQ99hyIMVdMJgsIX3b9M5Mm2f+qnbyy3q3PIMPKgPe8CWZoPJRMyoE:OWAE9AInJfF8dbRiteGmJKy

Score
10/10
xmrigxwormevasionexecutionminerrattrojan

Malware Config

Extracted

Family

xworm

C2

185.196.8.135:7000

Attributes
  • install_file

    USB.exe

Targets

    • Target

      RblxExecutor.exe

    • Size

      1.6MB

    • MD5

      3a235f7f491d95d4727320239c0b4cb7

    • SHA1

      b66d02b69f9d2cf011164406c6bc93a6728a65eb

    • SHA256

      e9397b42b5c3f7770b873a76355bd59cbe097f30dc9b9349e9787832bbe9767a

    • SHA512

      fa40f2d94bbe25372fc5eecb87168c3a55fb3fff1486ebd57d1f944760b43cc77a891fdbc246d5379e02b88b7f4f6abea0c94162e88ff87cabd246c7d8a5d83b

    • SSDEEP

      24576:O83AQ99hyIMVdMJgsIX3b9M5Mm2f+qnbyy3q3PIMPKgPe8CWZoPJRMyoE:OWAE9AInJfF8dbRiteGmJKy

    Score
    10/10
    evasionexecutionxmrigxwormminerrattrojan

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

      minerxmrig

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Looks for VirtualBox Guest Additions in registry

      evasion

    • Looks for VirtualBox drivers on disk

      evasion

    • XMRig Miner payload

      miner

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Looks for VMWare drivers on disk

      evasion

    • Executes dropped EXE

    • Loads dropped DLL

    • 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 SetThreadContext

    behavioral1behavioral2

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

Virtualization/Sandbox Evasion

4
T1497

Credential Access

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

4
T1497

File and Directory Discovery

2
T1083

Process Discovery

1
T1057

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Resource Development

Reconnaissance

Tasks