General

  • Target

    tinytask.ini

  • Size

    139B

  • Sample

    250327-swzfeawnv9

  • MD5

    c7ec8a1a22878d7f8d4eca22feb730e2

  • SHA1

    de7b8dc89f55fe1e3da4198d18cff150e9164a84

  • SHA256

    4b8f61fe0f034cd3151cb0e1e332256e7e2dca37a0c9d706a65937287b623462

  • SHA512

    68c369ba5b136673c325a7d4d262ec1a17789989a3a463deb1dd74d25c4d4208040caf5bf60c3aa78c50f07c86a537ac162bd5213326d12ba575638bac15a05e

Malware Config

Targets

    • Target

      tinytask.ini

    • Size

      139B

    • MD5

      c7ec8a1a22878d7f8d4eca22feb730e2

    • SHA1

      de7b8dc89f55fe1e3da4198d18cff150e9164a84

    • SHA256

      4b8f61fe0f034cd3151cb0e1e332256e7e2dca37a0c9d706a65937287b623462

    • SHA512

      68c369ba5b136673c325a7d4d262ec1a17789989a3a463deb1dd74d25c4d4208040caf5bf60c3aa78c50f07c86a537ac162bd5213326d12ba575638bac15a05e

    • Suspicious use of NtCreateUserProcessOtherParentProcess

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

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies RDP port number used by Windows

    • Sets service image path in registry

    • 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

    • Impair Defenses: Safe Mode Boot

    • 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.

    • Checks whether UAC is enabled

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

    • Drops desktop.ini file(s)

    • 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.

    • Mark of the Web detected: This indicates that the page was originally saved or cloned.

    • Network Share Discovery

      Attempt to gather information on host network.

    • 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