General

  • Target

    main.cmd

  • Size

    140B

  • Sample

    250122-gx2rdaskfs

  • MD5

    6048bdda1dfd48e6a362ab0215f5e568

  • SHA1

    e49d8e37a5eff5fd81584bca4d2184a2a9716b67

  • SHA256

    280dcd871598f7ac18dba9d481761b75a46ea1603ffcc221382a512399daa416

  • SHA512

    d56ea7dc7c6b1931cd15248e034906b4187c07ea5114699b0be98e85c7f008a40a1754aa17fb0cfd1e939c04357ee37ea8d6f8f4ecd6d2b3996ef7fb3a93bcff

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/43a1723/test/refs/heads/main/Mewing

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/43a1723/test/refs/heads/main/shellcode/loaderclient.ps1

Extracted

Family

xworm

Attributes
  • install_file

    client.exe

Targets

    • Target

      main.cmd

    • Size

      140B

    • MD5

      6048bdda1dfd48e6a362ab0215f5e568

    • SHA1

      e49d8e37a5eff5fd81584bca4d2184a2a9716b67

    • SHA256

      280dcd871598f7ac18dba9d481761b75a46ea1603ffcc221382a512399daa416

    • SHA512

      d56ea7dc7c6b1931cd15248e034906b4187c07ea5114699b0be98e85c7f008a40a1754aa17fb0cfd1e939c04357ee37ea8d6f8f4ecd6d2b3996ef7fb3a93bcff

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Clipboard Data

      Adversaries may collect data stored in the clipboard from users copying information within or between applications.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Enumerates processes with tasklist

    • Suspicious use of SetThreadContext

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

MITRE ATT&CK Enterprise v15

Tasks