Overview

overview

10

Static

static

10

2026-11-06...ry.exe

windows10-2004-x64

10

2026-11-06...ry.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    07/11/2026, 17:44

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General

  • Target
    2026-11-06_fea94498e0a7ca5d555e3df47be38850_amadey_cobalt-strike_darkgate_elex_luca-stealer_njrat_vidar_wannacry.exe
  • Size 7.8MB
  • Sample261107-wbbqdsfe56
  • SHA256 93d82713b01b767c0e8959adcac659d7f31c3784961cbd77d6347e969fec2955
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoveryfesberpersistenceupxworm

Malware Config

Signatures

  • Family: Fesber

    Fesber is a Windows worm written in Delphi.

    wormfesber
  • Detects Fesber payload 4 IoCs
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Drops file in System32 directory 3 IoCs
  • UPX packed file 4 IoCs

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

    upx
  • Drops file in Program Files directory 64 IoCs
  • 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 1 IoCs

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

    discovery

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-11-06_fea94498e0a7ca5d555e3df47be38850_amadey_cobalt-strike_darkgate_elex_luca-stealer_njrat_vidar_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-11-06_fea94498e0a7ca5d555e3df47be38850_amadey_cobalt-strike_darkgate_elex_luca-stealer_njrat_vidar_wannacry.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    PID:2660

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe-
        • Path C:\Program Files\7-Zip\7z.exe-
        • Size 8.4MB
        • SHA256 006da4ac54b4ce5db7cfbf1d98330397be36dabba67e3249435f9291b0fe6bb6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        fsb.tmp
        • Path C:\Windows\SysWOW64\fsb.tmp
        • Size 7.8MB
        • SHA256 b84e80e0b5d38014e082babe4c250b886b03803c27ec50cb7fdb2cf51472faa1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2660-0-0x0000000000400000-0x000000000041E000-memory.dmp
        Download

        memory/2660-915-0x0000000000400000-0x000000000041E000-memory.dmp
        Download