Resubmissions

06/06/2025, 20:01

250606-yrlxeabp4s

06/06/2025, 19:52

250606-ylqcmsbn2v

17/01/2025, 14:25

250117-rrrpbsslam10

General

  • Target
    Remcos.v3.8+DarkwebTools.rar
  • Size 186.2MB
  • Sample250117-rrrpbsslam
  • SHA256 c64dddb396187007e930e007882bbd440dbc869541395f7e36c7f1647f36e509
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • airavat

C2
  • https://DATABASE URL

Extracted

Family
  • njrat

Version
  • 0.7d

Botnet
  • HacKed

C2
  • 127.0.0.1:3158

Mutex
  • 1a2be4f309febbb9573b80d6514c9ee7

Attributes
  • reg_key

    1a2be4f309febbb9573b80d6514c9ee7

  • splitter

    |'|'|

Targets

    • Target
      Remcos.v3.8+DarkwebTools.rar
    • Size 186.2MB
    • SHA256 c64dddb396187007e930e007882bbd440dbc869541395f7e36c7f1647f36e509
    • MD5 SHA1 SHA512 SSDEEP
    • Njrat family

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • Remcos family

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • njRAT/Bladabindi

      Widely used RAT written in .NET.

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

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies RDP port number used by Windows

    • Modifies Windows Firewall

    • Sets service image path in registry

    • Checks BIOS information in registry

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

    • Drops startup file

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • 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.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks