Analysis

  • max time kernel
    150s
  • max time network
    158s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/09/2026, 10:12

General

  • Target
    2026-09-08_fa84b7991b208d72b474b0e19e3bc4d9_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
  • Size 7.4MB
  • Sample260908-l8h6maxfle
  • SHA256 9a3b0533b25605afab2ada8a121d77ef69ae7fa25e0203623f070f1a674bda2f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Fesber

    Fesber is a Windows worm written in Delphi.

  • Detects Fesber payload 11 IoCs
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Drops file in System32 directory 3 IoCs
  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

  • Suspicious behavior: LoadsDriver 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-09-08_fa84b7991b208d72b474b0e19e3bc4d9_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-09-08_fa84b7991b208d72b474b0e19e3bc4d9_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4640

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        7z.exe-

        • Path C:\Program Files\7-Zip\7z.exe-
        • Size 7.9MB
        • SHA256 739bf6c3b36fe7b698d125d7cfda17df04c406a5d0440ccc609d37952d9b6aa6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4640-585-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1040-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1272-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1273-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1274-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1275-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1278-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1280-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1282-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4640-1283-0x0000000000400000-0x000000000041B000-memory.dmp