Overview

overview

10

Static

static

10

Nurik.exe

windows11-21h2-x64

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General

  • Target

    Nurik.exe

  • Size

    210KB

  • Sample

    240522-v3fb8aae64

  • MD5

    bb252d8aa4f5834229ea080c11db0b59

  • SHA1

    7de57dfc07520a7f3013abc807446e8611914812

  • SHA256

    ae2ab592c449e18dd57692ae43b247ab02f5003ee170c87f82168d2aa6e03b8c

  • SHA512

    0e9aa28aeb33328b7b7140a461b45e4a211cb68326130e174b54dd260d3f44323a3ab86f16571e0b0e55c9597f293b9a5d085e1bb01f4fbe2cdb2b20080e4c5a

  • SSDEEP

    3072:tXbHXK681mboHFtHODlewZp0EAVHLqaHSegMc11irm+uhdtNp+5hBu:tXb6Ib2ewwZpTEH+NvlNpoh

Score
10/10
xwormevasionexecutionpersistenceransomwarerattrojan

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/cVQrB6DR

Targets

    • Target

      Nurik.exe

    • Size

      210KB

    • MD5

      bb252d8aa4f5834229ea080c11db0b59

    • SHA1

      7de57dfc07520a7f3013abc807446e8611914812

    • SHA256

      ae2ab592c449e18dd57692ae43b247ab02f5003ee170c87f82168d2aa6e03b8c

    • SHA512

      0e9aa28aeb33328b7b7140a461b45e4a211cb68326130e174b54dd260d3f44323a3ab86f16571e0b0e55c9597f293b9a5d085e1bb01f4fbe2cdb2b20080e4c5a

    • SSDEEP

      3072:tXbHXK681mboHFtHODlewZp0EAVHLqaHSegMc11irm+uhdtNp+5hBu:tXb6Ib2ewwZpTEH+NvlNpoh

    Score
    10/10
    xwormevasionexecutionpersistenceransomwarerattrojan

    • Detect Xworm Payload

    • 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

    • Disables Task Manager via registry modification

      evasion

    • Drops startup file

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • 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.

    • Modifies WinLogon

      persistence

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

3
T1112

Credential Access

Discovery

Query Registry

2
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Defacement

1
T1491

Resource Development

Reconnaissance

Tasks