Overview

overview

10

Static

static

10

2026-10-28...ry.exe

windows10-2004-x64

10

2026-10-28...ry.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    2026-10-28_a4742feb9fabd37fb480f3b2f918d7d4_amadey_cobalt-strike_elex_vidar_wannacry
  • Size 6.7MB
  • Sample261028-kklfeayv8q
  • SHA256 13c800fb8410f6d54cf888a7f30fd2bcadc3460ebeb0f54e0d9196b674ffaa21
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
fesberdiscoverypersistenceupxworm

Malware Config

Targets

    • Target
      2026-10-28_a4742feb9fabd37fb480f3b2f918d7d4_amadey_cobalt-strike_elex_vidar_wannacry
    • Size 6.7MB
    • SHA256 13c800fb8410f6d54cf888a7f30fd2bcadc3460ebeb0f54e0d9196b674ffaa21
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    discoveryfesberpersistenceupxworm

    • Detects Fesber payload

    • Family: Fesber

      Fesber is a Windows worm written in Delphi.

      wormfesber

    • Modifies WinLogon for persistence

      persistence

    • Drops file in System32 directory

    • UPX packed file

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

      upx
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks