VOIP-SIP-BRUTECredential Access

SIP REGISTER Bruteforce

Bruteforce SIP extension passwords (often = extension number) — log in as the extension, place outbound calls.

§ Where this technique fits

VOIP-SIP-BRUTE is catalogued under the Credential Access tactic of the offensive-security kill-chain. It appears in 1 approved dossier in the registry, typically at step 3 on average.

§ Dossiers chaining this technique

SIP extension brute → toll fraud / premium-rate exfil
Internet-exposed Asterisk / FreePBX with extensions whose password equals the extension number. Bruteforce a few, place expensive international / premium-rate calls.
step 3 / 5

§ What commonly comes next

01
Valid Accounts
T1078 · Initial Access
seen 1×

§ Where this technique fits

§ Dossiers chaining this technique

SIP extension brute → toll fraud / premium-rate exfil

§ What commonly comes next