Resubmissions

10/04/2025, 18:08

250410-wq19layzay 4

10/04/2025, 11:40

250410-ns3lfazxf1 10

General

  • Target

    https://cdn.discordapp.com/attachments/1359698661684019300/1359730422086373477/ICYYYY.zip?ex=67f88b23&is=67f739a3&hm=e5a3921fdcb0b3afa3c4647d614509acfaabd59f5314004c03681265f226da19&

  • Sample

    250410-ns3lfazxf1

Malware Config

Targets

    • Target

      https://cdn.discordapp.com/attachments/1359698661684019300/1359730422086373477/ICYYYY.zip?ex=67f88b23&is=67f739a3&hm=e5a3921fdcb0b3afa3c4647d614509acfaabd59f5314004c03681265f226da19&

    • Exela Stealer

      Exela Stealer is an open source stealer originally written in .NET and later transitioned to Python that was first observed in August 2023.

    • Exelastealer family

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Renames multiple (126) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • 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.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • 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

    • Checks installed software on the system

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

    • 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.

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Detected potential entity reuse from brand STEAM.

    • Drops file in System32 directory

    • Enumerates processes with tasklist

    • Hide Artifacts: Hidden Files and Directories

    • UPX packed file

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

MITRE ATT&CK Enterprise v16

Tasks