Overview

overview

10

Static

static

3

_97c71b612...60.exe

windows10-2004-x64

10

_97c71b612...60.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    _97c71b6121880b926622ece7f2aa5b3bb94dd151224740cc5a6cd94334068a60.exe
  • Size 12.0MB
  • Sample260429-vesyeahw7j
  • SHA256 97c71b6121880b926622ece7f2aa5b3bb94dd151224740cc5a6cd94334068a60
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
efimerexecutionpersistencepyarmorpyinstallertrojan

Malware Config

Targets

    • Target
      _97c71b6121880b926622ece7f2aa5b3bb94dd151224740cc5a6cd94334068a60.exe
    • Size 12.0MB
    • SHA256 97c71b6121880b926622ece7f2aa5b3bb94dd151224740cc5a6cd94334068a60
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    executionefimerpersistencetrojan

    • Family: Efimer

      Efimer is a trojan written in JS.

      trojanefimer

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks