Extracted

• • Target

    Yashma-Ransomware-main.zip

  • Size

    155KB

  • MD5

    e8403a7184c407130f2a1cd05c32919c

  • SHA1

    0be3aeca29120efadbc37c4e9ce074fd530c06e5

  • SHA256

    4cea74d80b0fed024d554aec6391dd7a4cc41abc44584b7b4617785d4842a1b0

  • SHA512

    0f6b96ecc2318df177b9a4335f718261a48cf577574cb80b217ba2dff300b5a61da75f40264f4f95f4432c0eda8da5e0cdb68c2c22bbf7eaede58af923bd8776

  • SSDEEP

    3072:IfUjZjB+4cQl18ClRkpf8b4yZWox0fbYgJVlSlcDZwngAgBVKu76LIw2/RbLpwLe:IKjBx1exoGbYOFBW+xLpaC7D8YRseByO

  Score

  10^/10

  chaosadwaredefense_evasiondiscoveryevasionexecutionpersistenceprivilege_escalationransomwarespywarestealertrojan

  • Chaos

    Ransomware family first seen in June 2021.

    ransomwarechaos

  • Chaos Ransomware

  • Chaos family

    chaos

  • Renames multiple (250) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware

  • Boot or Logon Autostart Execution: Active Setup

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

    persistence

  • Downloads MZ/PE file

  • Event Triggered Execution: Image File Execution Options Injection

    persistence

  • Manipulates Digital Signatures

    Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

  • 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.

    persistenceprivilege_escalation

  • 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.

    spywarestealer

  • Adds Run key to start application

    persistence

  • Checks installed software on the system

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery

  • Checks whether UAC is enabled

    evasiontrojan

  • Command and Scripting Interpreter: PowerShell

    Using powershell.exe command.

    execution

  • Drops desktop.ini file(s)

  • Enumerates connected drives

    Attempts to read the root path of hard drives other than the default C: drive.

  • Installs/modifies Browser Helper Object

    BHOs are DLL modules which act as plugins for Internet Explorer.

    stealeradware

  • Network Service Discovery

    Attempt to gather information on host's network.

    discovery

  • Network Share Discovery

    Attempt to gather information on host network.

    discovery

  • Checks system information in the registry

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

  • Drops file in System32 directory

  behavioral1