Overview

overview

10

Static

static

10

breh.exe

windows10-ltsc_2021-x64

10

breh.exe

windows10-2004-x64

10

breh.exe

windows11-21h2-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target
    breh.exe
  • Size 54KB
  • Sample260308-k52ywsbw2j
  • SHA256 2bc67c7341bc1956ee4e54c9b3fcb2a392ed1a1a40b28ed908b6b54a294f6d37
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
xwormdefense_evasiondiscoverypersistenceprivilege_escalationrattrojan

Malware Config

Extracted

Family

  • xworm

Version

  • XWorm V5.6

C2

  • rqtankvea.localto.net:2970

Attributes
  • install_file

    USB.exe

Targets

    • Target
      breh.exe
    • Size 54KB
    • SHA256 2bc67c7341bc1956ee4e54c9b3fcb2a392ed1a1a40b28ed908b6b54a294f6d37
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryxwormpersistenceprivilege_escalationrattrojan

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

    • Xworm family

      xworm

    • Modifies Windows Firewall

      defense_evasion

    • Server Software Component: Terminal Services DLL

      persistence

    • Allows Network login with blank passwords

      Allows local user accounts with blank passwords to access device from the network.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

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

    • Modifies WinLogon

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2behavioral3

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Server Software Component

1
T1505

Terminal Services DLL

1
T1505.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Remote Services

1
T1021

Remote Desktop Protocol

1
T1021.001

Collection

Command and Control

Exfiltration

Impact

Tasks