General

  • Target

    MBSetup.exe

  • Size

    2.6MB

  • Sample

    241029-cqhygashrl

  • MD5

    6b3b44639456a3230e3838d0d2202939

  • SHA1

    6aa554f51497c21d684d80fdf363e23b8f1f28f2

  • SHA256

    eedb91d5c57418231eaf086f3739353392fa83267075bc50de2cabd11db66c1f

  • SHA512

    fab38b9b7d587aed6f2ab267cf9afa878213832b86cc00519e0cf5880072aa95516796131afe87d641fe113f2041eef52988845df15b716330de0080bf5ccfea

  • SSDEEP

    49152:gXVmyjkeKRLbRHkqvlStQyfvE0Z3R0nxiIq2dsuH+Dj3IbmMB:gXVRjkeKRfrKtQRq2tEMB

Malware Config

Targets

    • Target

      MBSetup.exe

    • Size

      2.6MB

    • MD5

      6b3b44639456a3230e3838d0d2202939

    • SHA1

      6aa554f51497c21d684d80fdf363e23b8f1f28f2

    • SHA256

      eedb91d5c57418231eaf086f3739353392fa83267075bc50de2cabd11db66c1f

    • SHA512

      fab38b9b7d587aed6f2ab267cf9afa878213832b86cc00519e0cf5880072aa95516796131afe87d641fe113f2041eef52988845df15b716330de0080bf5ccfea

    • SSDEEP

      49152:gXVmyjkeKRLbRHkqvlStQyfvE0Z3R0nxiIq2dsuH+Dj3IbmMB:gXVRjkeKRfrKtQRq2tEMB

    • Jigsaw Ransomware

      Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

    • Jigsaw family

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Renames multiple (1512) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Drops file in Drivers directory

    • Modifies RDP port number used by Windows

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Impair Defenses: Safe Mode Boot

    • Adds Run key to start application

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Downloads MZ/PE file

    • 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

    • Boot or Logon Autostart Execution: Authentication Package

      Suspicious Windows Authentication Registry Modification.

    • Drops file in System32 directory

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Modifies WinLogon for persistence

MITRE ATT&CK Enterprise v15

Tasks