Overview

overview

10

Static

static

3

jaffacakes...ym.exe

windows10-2004-x64

10

jaffacakes...ym.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    18/10/2026, 16:03

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General

  • Target
    jaffacakes118_Worm.Win32.Vobfus.erym.exe
  • Size 148KB
  • Sample261018-thbmvsbf85
  • SHA256 51fe6b151c1300a7bcfb1731e8f8784d661db751315086d4cd830dacfb026ba2
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoverypersistence

Malware Config

Signatures

  • Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs
    defense_evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 51 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

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

    discovery
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Worm.Win32.Vobfus.erym.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Worm.Win32.Vobfus.erym.exe"
    1⤵
    • Modifies visibility of hidden/system files in Explorer
    • Checks computer location settings
    • Adds Run key to start application
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Users\Admin\maoeyib.exe
      "C:\Users\Admin\maoeyib.exe"
      2⤵
      • Modifies visibility of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:4336

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        maoeyib.exe
        • Path C:\Users\Admin\maoeyib.exe
        • Size 148KB
        • SHA256 e9860c80223048c460b06063a54a054f23380bb446ce3e364d6bacf8f65e7337
        • MD5 SHA1 SHA512 SSDEEP TLSH
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