Resubmissions

18/04/2025, 17:49

250418-wd4tystls6 8

09/04/2025, 06:42

250409-hgf1eastav 10

General

  • Target

    chase_apr_2025.lnk

  • Size

    1KB

  • Sample

    250409-hgf1eastav

  • MD5

    36a9f6a6fe333f902077a73d990f0a4e

  • SHA1

    906818153a8ff4bf10cfb8615ff6b9021140623c

  • SHA256

    09ef17dc4284a8d1a8b937354bd8137aa9c0d98bffb897bd891ccff854484e43

  • SHA512

    cfc907e28c5069edc9e837b53f13377fbc015e1baba7401d1f3adb0bbdefa1dc95b830da58ef3b84e07ef8e8558d0b9b593e3d5c4c0d258cb50f0c8c73d5f5c7

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://rietiholidays.it/wp-content/uploads/2021/06

Extracted

Family

koiloader

C2

http://103.245.231.56/pentateuchal.php

Attributes
  • payload_url

    https://rietiholidays.it/wp-content/uploads/2021/06

Targets

    • Target

      chase_apr_2025.lnk

    • Size

      1KB

    • MD5

      36a9f6a6fe333f902077a73d990f0a4e

    • SHA1

      906818153a8ff4bf10cfb8615ff6b9021140623c

    • SHA256

      09ef17dc4284a8d1a8b937354bd8137aa9c0d98bffb897bd891ccff854484e43

    • SHA512

      cfc907e28c5069edc9e837b53f13377fbc015e1baba7401d1f3adb0bbdefa1dc95b830da58ef3b84e07ef8e8558d0b9b593e3d5c4c0d258cb50f0c8c73d5f5c7

    • KoiLoader

      KoiLoader is a malware loader written in C++.

    • Koiloader family

    • Detects KoiLoader payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Indicator Removal: Clear Persistence

      Clear artifacts associated with previously established persistence like scheduletasks on a host.

MITRE ATT&CK Enterprise v16

Tasks