General

  • Target

    New Text Document.txt

  • Size

    257B

  • Sample

    240508-sfxlwace47

  • MD5

    b5c3b46dfdcee6ea4117fda406db0264

  • SHA1

    0e2f711bedf7b0f95b001cbf98b6e46300443013

  • SHA256

    9b46735c2fa7bf33c94b2b14734eee1c17655e25e5e6088b782815c1b985e452

  • SHA512

    d1000229a49110ae83622416bd16983c8e6a8ecbd9ec5f66c6f7d06713463f473ec90b9f4f684a54f710a562143d319c1b31dcc7dded0c797c98f2d7a8e88310

Malware Config

Targets

    • Target

      New Text Document.txt

    • Size

      257B

    • MD5

      b5c3b46dfdcee6ea4117fda406db0264

    • SHA1

      0e2f711bedf7b0f95b001cbf98b6e46300443013

    • SHA256

      9b46735c2fa7bf33c94b2b14734eee1c17655e25e5e6088b782815c1b985e452

    • SHA512

      d1000229a49110ae83622416bd16983c8e6a8ecbd9ec5f66c6f7d06713463f473ec90b9f4f684a54f710a562143d319c1b31dcc7dded0c797c98f2d7a8e88310

    • MilleniumRat

      MilleniumRat is a remote access trojan written in C#.

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Contacts a large (77172) amount of remote hosts

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

    • Creates a large amount of network flows

      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

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • 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.

    • 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.

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks