General

  • Target
    Bat To 0Exe.exe
  • Size 1005KB
  • Sample261113-nn71csty9n
  • SHA256 94509784f4e6bbe7ddcb00d09f2325cf9baec1cc80e14b5114987798aca3f191
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • umbral

Version
  • v1.3

C2
  • https://discord.com/api/webhooks/1570758573208768582/nGddHNMHIBlNIPILY45Ks6FoJQgV7Buy9G0Iyz9_TQpIJCuNut4Ev7R2HtXywOClM6LX

Targets

    • Target
      Bat To 0Exe.exe
    • Size 1005KB
    • SHA256 94509784f4e6bbe7ddcb00d09f2325cf9baec1cc80e14b5114987798aca3f191
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects Umbral payload

    • Family: Umbral

      Umbral stealer is an open-source modular stealer written in C#.

    • Command and Scripting Interpreter: PowerShell

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

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Disables one or more Microsoft Defender components

      Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

    • Checks computer location settings

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

    • Disables automatic submission of suspicious files to Microsoft by Windows Defender

      Uses the Powershell Set-MpPreference cmdlet to prevent Windows Defender from automatically sending files to Microsoft for analysis.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Contacts third-party web service commonly abused for C2

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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v16

Tasks