Overview

overview

10

Static

static

3

a10dc77caf...30.exe

windows10-2004-x64

10

a10dc77caf...30.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    a10dc77caf75fc0648bf1004d49e686f163e6130b85d13dffeea2f43de7f2830.bin
  • Size 13.0MB
  • Sample251104-srycjsdl9t
  • SHA256 a10dc77caf75fc0648bf1004d49e686f163e6130b85d13dffeea2f43de7f2830
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
efimerexecutionpersistencepyinstallertrojan

Malware Config

Targets

    • Target
      a10dc77caf75fc0648bf1004d49e686f163e6130b85d13dffeea2f43de7f2830.bin
    • Size 13.0MB
    • SHA256 a10dc77caf75fc0648bf1004d49e686f163e6130b85d13dffeea2f43de7f2830
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    executionefimerpersistencetrojan

    • Efimer

      Efimer is a trojan written in JS.

      trojanefimer

    • Efimer family

      efimer

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

      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