General

  • Target

    SolaraBootstrapper.exe

  • Size

    9.5MB

  • Sample

    240723-lykxga1amk

  • MD5

    42cd418e50599036f45acf1e639fb132

  • SHA1

    708932af15b8b01349f37adb246206408b22d807

  • SHA256

    7147f433db58190a7b35946752424a8e95fb7e45a3c6f4c1b24abc029c69bbcf

  • SHA512

    f4243c7ffbb7fe2b9717a995f8f65c16b518d336db2b2556a44d7396558f3246f650b5166a69019adead424d2c78bb09a651436cae9034fb6f1cced3e23a1326

  • SSDEEP

    196608:gwCE7JB0tYrXLW+d7UcIxptvyUQymRDSI1WCOK5l:gwCE9B0OjrdLK4J/7

Malware Config

Targets

    • Target

      SolaraBootstrapper.exe

    • Size

      9.5MB

    • MD5

      42cd418e50599036f45acf1e639fb132

    • SHA1

      708932af15b8b01349f37adb246206408b22d807

    • SHA256

      7147f433db58190a7b35946752424a8e95fb7e45a3c6f4c1b24abc029c69bbcf

    • SHA512

      f4243c7ffbb7fe2b9717a995f8f65c16b518d336db2b2556a44d7396558f3246f650b5166a69019adead424d2c78bb09a651436cae9034fb6f1cced3e23a1326

    • SSDEEP

      196608:gwCE7JB0tYrXLW+d7UcIxptvyUQymRDSI1WCOK5l:gwCE9B0OjrdLK4J/7

    • DcRat

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

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

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

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • XMRig Miner payload

    • 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

    • Event Triggered Execution: AppInit DLLs

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

    • .NET Reactor proctector

      Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

    • 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.

    • 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.

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks