With the Spun Lattice equipped, there seems to be a chance of Spun Chaos appearing, more likely with more Code Finesse:
(each line shows one hack, each time I reconnected Y(es) or N(o) shows if I got the Spun Chaos)
2 CF:
YYNYN
NYYNNNNNNYYN
NNNYNYNYYNN
NYNYYYNNNYN
NYYNNNNNNYYYYN
NNNYNY
YYNNNYN
NNYYNNNNYYY
YNNYNN
NNNNNNYNNN
35/93= 39%
13 CF:
YYNYYYYYY
YYYYYYYYYYYYY
YYYYYYYYYYYYNY
YYN
YYYNY
YYYYYYY
YYYYYYYYYYYY
YYYYYYYNYY
68/73 = 93%
Crypto reported not noticing this function not showing up, which would make sense with high CF. When first found I estimated 80% chance of it appearing, not sure what my Code Finesse was at the time.
The four options it picks from when used may not be totally random - needs investigating. Anecdotally it took a long time to get the +Defense message and I don't have a lot of Defence in my deck.