IcmpSendEcho

IcmpSendEcho is used to send an IPv4 ICMP echo request and returns any echo response replies. The call returns when the time-out has expired or the reply buffer is filled. This function is used by malware for time-evasion purposes by specifying a large timeout value.

Iphlpapi.dll

Evasion

https://docs.microsoft.com/en-us/windows/win32/api/icmpapi/nf-icmpapi-icmpsendecho