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General

  • Target

    SolaraBootstrapper.exe

  • Size

    9.3MB

  • Sample

    240624-j7t6dswckk

  • MD5

    a3a0a74ae9deaca4f0b17ff3b786a69d

  • SHA1

    49d033bdd1f2778a25decd8ec56b4a09082b05ad

  • SHA256

    ebdfc91afede21255f0a280514ef45f4335fac94f8b77562af3512fb01f83b68

  • SHA512

    c0b3cc5c12d20fef209bc2d838137cf7ac3eb9530738a8430f13f26b776ef8347fdaf9d00469bd82cf5e84d6eaf21a8ef2e2abd403f8708bb6ee172388cf743f

  • SSDEEP

    196608:Aqw6WBeyrZJvSzhEz2T2cU7Lu4MoXZZe5BvqBbq5jUx5ePz0+pgapx:UahMW+XRXZZKBGWoiFO6x

Malware Config

Targets

    • Target

      SolaraBootstrapper.exe

    • Size

      9.3MB

    • MD5

      a3a0a74ae9deaca4f0b17ff3b786a69d

    • SHA1

      49d033bdd1f2778a25decd8ec56b4a09082b05ad

    • SHA256

      ebdfc91afede21255f0a280514ef45f4335fac94f8b77562af3512fb01f83b68

    • SHA512

      c0b3cc5c12d20fef209bc2d838137cf7ac3eb9530738a8430f13f26b776ef8347fdaf9d00469bd82cf5e84d6eaf21a8ef2e2abd403f8708bb6ee172388cf743f

    • SSDEEP

      196608:Aqw6WBeyrZJvSzhEz2T2cU7Lu4MoXZZe5BvqBbq5jUx5ePz0+pgapx:UahMW+XRXZZKBGWoiFO6x

    • Deletes Windows Defender Definitions

      Uses mpcmdrun utility to delete all AV definitions.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • 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

    • Drops file in Drivers directory

    • Event Triggered Execution: Image File Execution Options Injection

    • 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.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • 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.

    • UPX packed file

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • Checks whether UAC is enabled

    • 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.

    • 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 NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks