Resubmissions

05/08/2026, 00:30

260805-atlgnaba278

05/08/2026, 00:07

260805-aer1wstdmf8

General

  • Target
    LostInWinter Setup 2.1.1.exe.bad
  • Size 85.9MB
  • Sample260805-atlgnaba27
  • SHA256 b1d3214d094f13957cf4cfaa04f6cbd5d621ddc5f4aee5a64d686740f063c76e
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      LostInWinter Setup 2.1.1.exe.bad
    • Size 85.9MB
    • SHA256 b1d3214d094f13957cf4cfaa04f6cbd5d621ddc5f4aee5a64d686740f063c76e
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    N/A
    • Target
      LostInWinter.exe
    • Size 164.5MB
    • SHA256 d8a522aa66b024e5875a7f9643074eec1b4068b65cbc8125f235701cde7193b9
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Modifies Windows Firewall

    • Checks computer location settings

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

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    • 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.

    • Adds Run key to start application

    • Badlisted process makes network request

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

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Enumerates connected drives

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

    • 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.

    • Discovers running processes

      Running process information can be used to identify security tools or plan follow-on actions.

    • Executes a VBScript file via the Windows Script Host.

MITRE ATT&CK Enterprise v16

Tasks