General

  • Target

    ReasonLabs-EPP-setup.exe

  • Size

    1.9MB

  • Sample

    241027-zaxg9azjhn

  • MD5

    aaf87d0de3d04a22bf52f344cce45dbb

  • SHA1

    faf160f62a8d813083e004c73718f80a1dba94e5

  • SHA256

    6656cc24f67409b0b8dc5f6383b62dbe80e74e6854456c189b17bd1b79a829f5

  • SHA512

    f96d6fe4633eea6a94b5c73cc4cdd209a84cbf9293a1cc0433af16b7bf68d39571d363244388a098947d8815a3d5571907d541bf767055fdbce782974241c2ab

  • SSDEEP

    49152:oTl+Ffl0KCV8rEKbhHJikCz/NqoNcugBhnem0XI:oTl+xLRHAVLVNcpip4

Malware Config

Targets

    • Target

      ReasonLabs-EPP-setup.exe

    • Size

      1.9MB

    • MD5

      aaf87d0de3d04a22bf52f344cce45dbb

    • SHA1

      faf160f62a8d813083e004c73718f80a1dba94e5

    • SHA256

      6656cc24f67409b0b8dc5f6383b62dbe80e74e6854456c189b17bd1b79a829f5

    • SHA512

      f96d6fe4633eea6a94b5c73cc4cdd209a84cbf9293a1cc0433af16b7bf68d39571d363244388a098947d8815a3d5571907d541bf767055fdbce782974241c2ab

    • SSDEEP

      49152:oTl+Ffl0KCV8rEKbhHJikCz/NqoNcugBhnem0XI:oTl+xLRHAVLVNcpip4

    • Cobalt Strike reflective loader

      Detects the reflective loader used by Cobalt Strike.

    • Cobaltstrike

      Detected malicious payload which is part of Cobaltstrike.

    • Cobaltstrike family

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Dcrat family

    • Process spawned unexpected child process

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

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • 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.

    • Adds Run key to start application

    • 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.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Enumerates connected drives

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

    • Modifies powershell logging option

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Checks system information in the registry

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks