Overview

overview

10

Static

static

10

2026-11-03...ry.exe

windows10-2004-x64

10

2026-11-03...ry.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/11/2026, 14:01

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General

  • Target
    2026-11-03_8f547baac0deb59ffa18ef7884e1db4a_amadey_cobalt-strike_darkgate_elex_luca-stealer_njrat_vidar_wannacry.exe
  • Size 7.8MB
  • Sample261104-rb1masc17p
  • SHA256 13cda0bce4ec4883c50b8f414f67f89e000d976ba79863663c2d8fd4499013f8
  • 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 3 IoCs
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Drops file in System32 directory 3 IoCs
  • UPX packed file 3 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
  • Suspicious behavior: LoadsDriver 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-11-03_8f547baac0deb59ffa18ef7884e1db4a_amadey_cobalt-strike_darkgate_elex_luca-stealer_njrat_vidar_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-11-03_8f547baac0deb59ffa18ef7884e1db4a_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:4600

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 b2a62ac36a14a9cca8573cb25d821dd88712de363a44a524726daa841c560aff
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/4600-0-0x0000000000400000-0x000000000041E000-memory.dmp
        Download

        memory/4600-617-0x0000000000400000-0x000000000041E000-memory.dmp
        Download