General

  • Target

    SolaraBootstrapper.exe

  • Size

    9.5MB

  • Sample

    240722-2la5hasdpg

  • MD5

    81cc5781eddb3eac7b5ba88706a43cd8

  • SHA1

    34db4fa4cb034f23586027fa59867058a0f79d23

  • SHA256

    f9492af3afb78775082e480af744d660db9da8bc33c3ff63d869abf62d900f6e

  • SHA512

    f2bf7b780a13ecbf5d684c015c94ced7936ad8dc8437f775ea4bf63d47890ec7907f975de95dade487ef2512b8dcef067239454782fd2b32db1631f4d23d9ac4

  • SSDEEP

    196608:1E7JB0tYrXLW+d7UcIxptvyUQymRDSI1WCOK53Ie:1E9B0OjrdLK4J/tIe

Malware Config

Targets

    • Target

      SolaraBootstrapper.exe

    • Size

      9.5MB

    • MD5

      81cc5781eddb3eac7b5ba88706a43cd8

    • SHA1

      34db4fa4cb034f23586027fa59867058a0f79d23

    • SHA256

      f9492af3afb78775082e480af744d660db9da8bc33c3ff63d869abf62d900f6e

    • SHA512

      f2bf7b780a13ecbf5d684c015c94ced7936ad8dc8437f775ea4bf63d47890ec7907f975de95dade487ef2512b8dcef067239454782fd2b32db1631f4d23d9ac4

    • SSDEEP

      196608:1E7JB0tYrXLW+d7UcIxptvyUQymRDSI1WCOK53Ie:1E9B0OjrdLK4J/tIe

    • 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

    • .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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks