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As we previously noted, the campaign components include information about the targets, such as their email address and company logo. This campaign’s primary goal is to harvest usernames, passwords, and-in its more recent iteration-other information like IP address and location, which attackers use as the initial entry point for later infiltration attempts. Only when these segments are put together and properly decoded does the malicious intent show.

#Morse decoder javascript code#

In effect, the attachment is comparable to a jigsaw puzzle: on their own, the individual segments of the HMTL file may appear harmless at the code level and may thus slip past conventional security solutions. Instead, they reside in various open directories and are called by encoded scripts.

Some of these code segments are not even present in the attachment itself. These attackers moved from using plaintext HTML code to employing multiple encoding techniques, including old and unusual encryption methods like Morse code, to hide these attack segments. The HTML attachment is divided into several segments, including the JavaScript files used to steal passwords, which are then encoded using various mechanisms. This phishing campaign exemplifies the modern email threat: sophisticated, evasive, and relentlessly evolving. During our year-long investigation of a targeted, invoice-themed XLS.HTML phishing campaign, attackers changed obfuscation and encryption mechanisms every 37 days on average, demonstrating high motivation and skill to constantly evade detection and keep the credential theft operation running.

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Scripts are in pure javascript to prevent encoded/decoded string storing which could be seen by server administrator. Thus the most common letter in English, the letter "E", has the shortest code, a single dot. To increase the speed of the communication, the code was designed so that the length of each character in Morse varies approximately inversely to its frequency of occurrence in English. The dot duration is the basic unit of time measurement in code transmission. The letters of a word are separated by a space equal to three dots (one dash), and the words are separated by a space equal to seven dots. Each dot or dash is followed by a short silence, equal to the dot duration. The duration of a dash is three times the duration of a dot. Because many non-English natural languages use more than the 26 Roman letters, extensions to the Morse alphabet exist for those languages.Įach Morse code symbol represents either a text character (letter or numeral) or a prosign and is represented by a unique sequence of dots and dashes.

#Morse decoder javascript iso#

The International Morse Code encodes the ISO basic Latin alphabet, some extra Latin letters, the Arabic numerals and a small set of punctuation and procedural signals (prosigns) as standardized sequences of short and long signals called "dots" and "dashes", or "dits" and "dahs", as in amateur radio practice.

#Morse decoder javascript series#

Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment. PHP - Object-oriented programming (OOP) Advanced Basics.PHP - Object-oriented programming (OOP) Basics.PHP - Object-oriented programming (OOP) Introduction.

#Morse decoder javascript windows#

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