Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    22/08/2026, 14:57

General

  • Target
    2026-08-21_551ebca6c4190a6680323f9c97b38037_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
  • Size 6.9MB
  • Sample260822-sbpepszxe1
  • SHA256 83f9c3c2198ec95d1c0e769c20f4f99d8df494748fb3003841af8fdf4e1373b1
  • 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-21_551ebca6c4190a6680323f9c97b38037_amadey_cobalt-strike_elex_hijackloader_icedid_luca-stealer_njrat_vidar.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-21_551ebca6c4190a6680323f9c97b38037_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:3732

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 7.4MB
        • SHA256 81aa12ebeab9e64b9e972c09b16de9ecaa3f0b4775dd3328805853d6938f25e7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        fsb.tmp

        • Path C:\Windows\SysWOW64\fsb.tmp
        • Size 6.9MB
        • SHA256 83f9c3c2198ec95d1c0e769c20f4f99d8df494748fb3003841af8fdf4e1373b1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/3732-907-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-1641-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2235-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2236-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2237-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2238-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2241-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2245-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3732-2246-0x0000000000400000-0x000000000041B000-memory.dmp