Analysis

  • user interaction
    yes
  • max time kernel
    298s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    07/10/2026, 19:26

General

  • Target
    Grabber.exe
  • Size 233KB
  • Sample261007-x5srfady21
  • SHA256 14f51104e5d051531a6595a252534efc706dc77269d1f1cec686863f9d3ca115
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Umbral

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

  • Detects Umbral payload 1 IoCs
  • Looks up external IP address via web service 1 TTPs 1 IoCs

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

  • Queries system WMI classes for hardware identifiers 2 TTPs 1 IoCs

    Uses WMI to read hardware serial numbers or the system UUID, commonly used to fingerprint the victim machine.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Suspicious use of AdjustPrivilegeToken 43 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Grabber.exe
    "C:\Users\Admin\AppData\Local\Temp\Grabber.exe"
    1⤵
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4720
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Queries system WMI classes for hardware identifiers
      • Reads the TCP/IP host and domain name from the registry
      • Suspicious use of AdjustPrivilegeToken
      PID:2124

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        memory/4720-0-0x00000214CADB0000-0x00000214CADF0000-memory.dmp

        memory/4720-1-0x00000214E53A0000-0x00000214E53B0000-memory.dmp