General

  • Target
    test.rar
  • Size 329.0MB
  • Sample251119-23mvmafv9c
  • SHA256 053bab9dadc68c7f55193ba42fb88043ccf0a4d2b71c7f8ea5d01439d8da186f
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

Version
  • 5.0

C2
  • Nightmare15.strangled.net:7000

Mutex
  • FfNhmU5XKESAkASq

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

aes.plain

Extracted

Family
  • limerat

Attributes
  • aes_key

    in0c3nt

  • antivm

    false

  • c2_url

    https://paste.fo/raw/7ad53c7a1aa4

  • delay

    3

  • download_payload

    false

  • install

    true

  • install_name

    SysConfig.exe

  • main_folder

    UserProfile

  • pin_spread

    false

  • sub_folder

    \System Configurations\

  • usb_spread

    false

Targets

    • Target
      test.rar
    • Size 329.0MB
    • SHA256 053bab9dadc68c7f55193ba42fb88043ccf0a4d2b71c7f8ea5d01439d8da186f
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Neshta payload

    • Detect Xworm Payload

    • Detects DonutLoader

    • DonutLoader

      DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

    • Donutloader family

    • LimeRAT

      Simple yet powerful RAT for Windows machines written in .NET.

    • Limerat family

    • Neshta

      Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

    • Neshta family

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

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

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Patched UPX-packed file

      Sample is packed with UPX but required header fields are zeroed out to prevent unpacking with the default UPX tool.

    • .NET Reactor proctector

      Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

    • Checks BIOS information in registry

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

    • Drops startup file

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Indicator Removal: File Deletion

      Adversaries may delete files left behind by the actions of their intrusion activity.

    • 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.

    • ConfuserEx .NET packer

      Detects ConfuserEx .NET packer.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks