General

  • Target

    New Text Document.txt

  • Size

    352B

  • Sample

    240508-tgn7kaeh57

  • MD5

    901993bbd60acc525b9811b758de0ff0

  • SHA1

    beeb0f22183104e9862a2bd2f3ba2af2494f8af9

  • SHA256

    91c3d71ccdc02d3fe1ad1c9ffdbff3dc2a350e97e3482f843e94348af3a63446

  • SHA512

    7933a372f5de7c921e6d3582c0772d27935301cc325ba1b24988246c4f4e17f55bc872017d6609311a9d7804f1932a68d920df53a6cf4f339ff6ae8709eb2f7d

Malware Config

Targets

    • Target

      New Text Document.txt

    • Size

      352B

    • MD5

      901993bbd60acc525b9811b758de0ff0

    • SHA1

      beeb0f22183104e9862a2bd2f3ba2af2494f8af9

    • SHA256

      91c3d71ccdc02d3fe1ad1c9ffdbff3dc2a350e97e3482f843e94348af3a63446

    • SHA512

      7933a372f5de7c921e6d3582c0772d27935301cc325ba1b24988246c4f4e17f55bc872017d6609311a9d7804f1932a68d920df53a6cf4f339ff6ae8709eb2f7d

    • MilleniumRat

      MilleniumRat is a remote access trojan written in C#.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Contacts a large (14416) amount of remote hosts

      This may indicate a network scan to discover remotely running services.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Stops running service(s)

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Adds Run key to start application

    • Blocklisted process makes network request

    • Checks installed software on the system

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

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks