General

  • Target

    FileZilla_3.62.2_win64-setup.exe

  • Size

    11.4MB

  • Sample

    230403-yzm5faaf91

  • MD5

    579bb096d23e81d7acea4f09ae1a5f20

  • SHA1

    70d466914d392a0a2c06d8ed62882ec5a71f54bd

  • SHA256

    ef3c2dfbe13aeef9d04bf6faebec26b97d614e52f24c63955bf7d36543253e07

  • SHA512

    9596496e8200bb8d314503ddad973304a48461b8dcb052912d5d068d3877172ee1d57f53556b3807cd6df4c875babf1393f9a2b2bd1c8e6a9d9b37ba971ee656

  • SSDEEP

    196608:jWc8gUVaVHNOSYJ6pbitQaE+mUqbsP47XyRBVKhure3XIY1XssQgooVoo/7kU7Mh:jWcyaVwSq6pbQ3EgPUCzVwuKFXsERooi

Malware Config

Targets

    • Target

      FileZilla_3.62.2_win64-setup.exe

    • Size

      11.4MB

    • MD5

      579bb096d23e81d7acea4f09ae1a5f20

    • SHA1

      70d466914d392a0a2c06d8ed62882ec5a71f54bd

    • SHA256

      ef3c2dfbe13aeef9d04bf6faebec26b97d614e52f24c63955bf7d36543253e07

    • SHA512

      9596496e8200bb8d314503ddad973304a48461b8dcb052912d5d068d3877172ee1d57f53556b3807cd6df4c875babf1393f9a2b2bd1c8e6a9d9b37ba971ee656

    • SSDEEP

      196608:jWc8gUVaVHNOSYJ6pbitQaE+mUqbsP47XyRBVKhure3XIY1XssQgooVoo/7kU7Mh:jWcyaVwSq6pbQ3EgPUCzVwuKFXsERooi

    • Modifies WinLogon for persistence

    • UAC bypass

    • Disables RegEdit via registry modification

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

2
T1060

Bootkit

1
T1067

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Modify Registry

5
T1112

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Install Root Certificate

1
T1130

Discovery

Query Registry

4
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Command and Control

Web Service

1
T1102

Impact

Defacement

1
T1491

Tasks