Overview

overview

10

Static

static

3

SolaraBoot...er.exe

windows7-x64

3

SolaraBoot...er.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    SolaraBootstrapper.exe

  • Size

    13KB

  • Sample

    240701-wkxn8avgkq

  • MD5

    8be476fb431fcf11156417f410acf978

  • SHA1

    55a19def82358ffc006487e1f49be04277e12bd5

  • SHA256

    14cf7648123e018dcdfc2aa386135a0510a9f7b12b8bc125ad4e32fd7f16999c

  • SHA512

    cf747947ff0bedf87230e0fa08ee534f44f08962a52ae3dd0c0d734d6f4131456a0e2dc1ac230fa6500d5b254a64cae9e01161d1a690e26794c38d66e22cb5ed

  • SSDEEP

    192:IUxOQrGVa/nHU0LgJ2jaVb4+LHdrDXy3pifUJ1hHxrWjd:hIQaVafU0LmqaVb4+xPy5ifU1hRyj

Score
10/10
xwormevasionexecutionpersistenceratthemidatrojan

Malware Config

Extracted

Family

xworm

C2

anyone-blogging.gl.at.ply.gg:22284

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    XClient.exe

Targets

    • Target

      SolaraBootstrapper.exe

    • Size

      13KB

    • MD5

      8be476fb431fcf11156417f410acf978

    • SHA1

      55a19def82358ffc006487e1f49be04277e12bd5

    • SHA256

      14cf7648123e018dcdfc2aa386135a0510a9f7b12b8bc125ad4e32fd7f16999c

    • SHA512

      cf747947ff0bedf87230e0fa08ee534f44f08962a52ae3dd0c0d734d6f4131456a0e2dc1ac230fa6500d5b254a64cae9e01161d1a690e26794c38d66e22cb5ed

    • SSDEEP

      192:IUxOQrGVa/nHU0LgJ2jaVb4+LHdrDXy3pifUJ1hHxrWjd:hIQaVafU0LmqaVb4+xPy5ifU1hRyj

    Score
    10/10
    xwormevasionexecutionpersistenceratthemidatrojan

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

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

      evasion

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

      themida

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      evasiontrojan

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2

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

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

5
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Resource Development

Reconnaissance

Tasks