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241102-jpyqvs1drm 3

General

  • Target

    Bootstrapper.exe

  • Size

    800KB

  • Sample

    241102-kxfexssqem

  • MD5

    2a4dcf20b82896be94eb538260c5fb93

  • SHA1

    21f232c2fd8132f8677e53258562ad98b455e679

  • SHA256

    ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

  • SHA512

    4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

  • SSDEEP

    12288:t0zVvgDNMoWjTmFzAzBocaKjyWtiR1pptHxQ0z:O5vgHWjTwAlocaKjyyItHDz

Malware Config

Targets

    • Target

      Bootstrapper.exe

    • Size

      800KB

    • MD5

      2a4dcf20b82896be94eb538260c5fb93

    • SHA1

      21f232c2fd8132f8677e53258562ad98b455e679

    • SHA256

      ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

    • SHA512

      4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

    • SSDEEP

      12288:t0zVvgDNMoWjTmFzAzBocaKjyWtiR1pptHxQ0z:O5vgHWjTwAlocaKjyyItHDz

    • Modifies WinLogon for persistence

    • Modifies firewall policy service

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Windows security bypass

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • Disables cmd.exe use via registry modification

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Event Triggered Execution: AppInit DLLs

      Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

    • Event Triggered Execution: Image File Execution Options Injection

    • Looks for Xen service registry key.

    • Server Software Component: Terminal Services DLL

    • Sets service image path in registry

    • Uses Session Manager for persistence

      Creates Session Manager registry key to run executable early in system boot.

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Deletes itself

    • 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.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Windows security modification

    • Adds Run key to start application

    • Blocklisted process makes network request

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Checks whether UAC is enabled

    • Enumerates connected drives

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

    • Indicator Removal: Clear Persistence

      remove IFEO.

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

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

    • Mark of the Web detected: This indicates that the page was originally saved or cloned.

    • Modifies WinLogon

    • Boot or Logon Autostart Execution: Authentication Package

      Suspicious Windows Authentication Registry Modification.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks