General

  • Target

    Tryhard - External.exe

  • Size

    15.2MB

  • Sample

    250127-yjr4fstje1

  • MD5

    b032db979b409e9c010322709ccfa2ca

  • SHA1

    ade674caa85fbce63b6226d100a3e1ca12b7abce

  • SHA256

    6e730445f480928385d507a3cfb776caba82e0097c4a754d427a1777dc649c98

  • SHA512

    9e62ceb443863659af0ba8334bd89138e0b557d67c4a9ff5c09a120dba2e3eae820b426122449fad70454296ec90889388dfb749dfe35f893cfc1a3b4c7bd016

  • SSDEEP

    393216:znyYZteycGUMPXZ5MOD9dbH2urEUWjJjIfoo4jLxhI:zyiteycQZOOx1WdbJ8fUnxhI

Malware Config

Targets

    • Target

      Tryhard - External.exe

    • Size

      15.2MB

    • MD5

      b032db979b409e9c010322709ccfa2ca

    • SHA1

      ade674caa85fbce63b6226d100a3e1ca12b7abce

    • SHA256

      6e730445f480928385d507a3cfb776caba82e0097c4a754d427a1777dc649c98

    • SHA512

      9e62ceb443863659af0ba8334bd89138e0b557d67c4a9ff5c09a120dba2e3eae820b426122449fad70454296ec90889388dfb749dfe35f893cfc1a3b4c7bd016

    • SSDEEP

      393216:znyYZteycGUMPXZ5MOD9dbH2urEUWjJjIfoo4jLxhI:zyiteycQZOOx1WdbJ8fUnxhI

    • Modifies WinLogon for persistence

    • Modifies visiblity of hidden/system files in Explorer

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

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks BIOS information in registry

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

    • Clipboard Data

      Adversaries may collect data stored in the clipboard from users copying information within or between applications.

    • 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.

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Enumerates processes with tasklist

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks