Overview

overview

10

Static

static

3

Nursultan.exe

windows10-2004-x64

10

Nursultan.exe

windows11-21h2-x64

10

Sharing

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General

  • Target

    Nursultan.exe

  • Size

    19.8MB

  • Sample

    240609-sev2nace27

  • MD5

    4aa0a579b602bd4434e6c857294fcca5

  • SHA1

    3b4fec5946e430c54ec4b9170b165c9893368c1b

  • SHA256

    13dcf8833f9fe533311420d9db085b180aca2ff1674e692c79b6596ebf5a83cd

  • SHA512

    58fc656496033afdeda99efb2d9576fcc46e4b8af96ed0d024dc13b1fd775a98dad74d53f917c0e63980129221ecd686a8e178a86da423fadaac0761d50eff4a

  • SSDEEP

    393216:kTspQo6f651rlw2PbRAInE5xg2N0hS+cpEMqT96SDtwdM7d3dgB7bSu8bafx3:kQuo6kBbeIACkAaE6k4MwBau8ix

Score
10/10
umbralxwormexecutionpersistenceratspywarestealertrojan

Malware Config

Extracted

Family

xworm

C2

north-modem.gl.at.ply.gg:45517

Attributes
  • Install_directory

    %AppData%

  • install_file

    Antimalware Service Executable.exe

Targets

    • Target

      Nursultan.exe

    • Size

      19.8MB

    • MD5

      4aa0a579b602bd4434e6c857294fcca5

    • SHA1

      3b4fec5946e430c54ec4b9170b165c9893368c1b

    • SHA256

      13dcf8833f9fe533311420d9db085b180aca2ff1674e692c79b6596ebf5a83cd

    • SHA512

      58fc656496033afdeda99efb2d9576fcc46e4b8af96ed0d024dc13b1fd775a98dad74d53f917c0e63980129221ecd686a8e178a86da423fadaac0761d50eff4a

    • SSDEEP

      393216:kTspQo6f651rlw2PbRAInE5xg2N0hS+cpEMqT96SDtwdM7d3dgB7bSu8bafx3:kQuo6kBbeIACkAaE6k4MwBau8ix

    Score
    10/10
    umbralxwormexecutionpersistenceratspywarestealertrojan

    • Detect Umbral payload

    • Detect Xworm Payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

      stealerumbral

    • Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • 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

    • Adds Run key to start application

      persistence

    • 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.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

3
T1012

Remote System Discovery

1
T1018

System Information Discovery

4
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Exfiltration

Impact

Tasks