Lammbda.com is a browser hijacker coming to the PC without the user's consent and changing the settings of all the browsers installed in your system, such as Chrome, Mozilla, IE, and others. This sets https://lammbda.com/ as the default homepage and search engine.
If you notice that the browser homepage and the search engine is changed to https://foobaroo.com/index.php?a=web&q=, then most likely it means that your browsers have been attacked by Foobaroo.com.
Slicksearch.com is fake search engine, called browser hijacker. After penetration of an Internet browser, it changes the settings of the homepage and replaces the search engine on own one. This search engine may seem normal, as it looks modern and offers familiar features for searching as Google, Yahoo or Bing but, in fact, it is annoying unwanted software, endangering the safety of your personal data.
Search.bittsearch.com is a browser hijacker, which implements on user Mac and hiddenly collects a user personal data. Also, it can change a browser homepage in Google Chrome, Safari and Mozilla Firefox and redirects every new tab to https://Search.bittsearch.com/
Search.globalsearch.pw is one of the most common type of malware - browser hijacker. This changes the browser settings without the user's consent, setting http://search.globalsearch.pw/ as the default homepage and search engine in Safari, Firefox, Chrome and other browsers installed in your system.