Sex Male
Birth Date 1973
Birth Place Spain
Operations Madrid, Spain
Affiliation(s) 29A
Years active 1996-2007

Griyo is a coder from Spain, affiliated with the 29A group.


Griyo started working with computers at the age of 8. He began making money at it by disabling the copy protection on games and selling them at the "rastro", a flea market for software pirates. Griyo learned game programming and worked for some Spanish companies in this area until going to university.

Griyo was dissatisfied with computer education in Spain, which focused mostly on application programming and managment rather than systems. Coding viruses allowed him to learn about computers at the level he wanted. He joined 29A after being contacted by Mister Sandman.

Over time, Griyo learned learned several programming languages, including a few different types of processor assembly (Z80, Motorola 68000 series, Intel 8086 and 80x86 families), C++, Cobol, Fortran, Pascal, Basic, SQL, Pro-C, Java, HTML and some others. His preference was for Assembly and C++.


Griyo, sometimes also spelled GriYo, comes from an "optimized" spelling of the word "grillo" (pronounced as Gri-Yo), the Spanish word for "Cricket". He took this name because a friend once described him as being similar to "Pepito Grillo" (Jiminy Cricket in the Spanish version of Pinnochio) and the nickname stuck.


Griyo often named his viruses after a real illness.

Other facts

Aside from viruses, music was a hobby of Griyo. He worked as a deejay in Madrid on weekends. His favorite types of music include house, trip-hop and techno.


iKX. Interview with Griyo. 1998.05

29A Home Page (News Section), 2007.01

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