Overview

overview

10

Static

static

10

2026-08-02...st.exe

windows10-2004-x64

5

2026-08-02...st.exe

windows11-ltsc_2024-x64

5

Sharing

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General

  • Target
    2026-08-02_c7ac4767c895e4bd24dcd858f94e0e71_amadey_cobalt-strike_elex_glassworm_hijackloader_luca-stealer_njrat_remcos_smoke-loader_vidar_wannacry
  • Size 5.9MB
  • Sample260802-vdj9waxblc
  • SHA256 5772a26fcee9cfeac52686a7c77458f5fd1be10550adbdde6eeb473a1e57f745
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
upxwormfesber

Malware Config

Signatures

  • Family: Fesber

    Fesber is a Windows worm written in Delphi.

    wormfesber
  • Detects Fesber payload 1 IoCs
  • Detects executables containing URLs to raw contents of a Github gist 1 IoCs
  • Detects executables embedding registry key / value combination indicative of disabling Windows Defen 1 IoCs
  • UPX packed file 1 IoCs

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

    upx
  • Unsigned PE 2 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • 2026-08-02_c7ac4767c895e4bd24dcd858f94e0e71_amadey_cobalt-strike_elex_glassworm_hijackloader_luca-stealer_njrat_remcos_smoke-loader_vidar_wannacry
    .exe 5.9MB
  • out.upx
    .exe 16KB

2026-08-02_c7ac4767c895e4bd24dcd858f94e0e71_amadey_cobalt-strike_elex_glassworm_hijackloader_luca-stealer_njrat_remcos_smoke-loader_vidar_wannacry

  • SHA256 5772a26fcee9cfeac52686a7c77458f5fd1be10550adbdde6eeb473a1e57f745
  • MD5 SHA1 SHA512 SSDEEP TLSH
windows:4windowsx86arch:x86

  • Detects Fesber payload

  • Detects executables containing URLs to raw contents of a Github gist

  • Detects executables embedding registry key / value combination indicative of disabling Windows Defen

  • UPX packed file

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

    upx

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
118496
Magic Number
267
Subsystem
IMAGE_SUBSYSTEM_WINDOWS_GUI
DLL Characteristics
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LINE_NUMS_STRIPPED IMAGE_FILE_LOCAL_SYMS_STRIPPED IMAGE_FILE_BYTES_REVERSED_LO IMAGE_FILE_32BIT_MACHINE IMAGE_FILE_BYTES_REVERSED_HI
PDB paths