HackTool - Impacket Tools Execution

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects the execution of different compiled Windows binaries of the impacket toolset (based on names or part of their names - could lead to false positives)

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1557.001` Adversary-in-the-Middle: LLMNR/NBT-NS Poisoning and SMB Relay
Collection	`T1557.001` Adversary-in-the-Middle: LLMNR/NBT-NS Poisoning and SMB Relay

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `selection`

or:
Image|endswith: '\GetADUsers_windows.exe'
Image|endswith: '\GetNPUsers_windows.exe'
Image|endswith: '\GetUserSPNs_windows.exe'
Image|endswith: '\atexec_windows.exe'
Image|endswith: '\dcomexec_windows.exe'
Image|endswith: '\dpapi_windows.exe'
Image|endswith: '\findDelegation_windows.exe'
Image|endswith: '\getPac_windows.exe'
Image|endswith: '\getST_windows.exe'
Image|endswith: '\getTGT_windows.exe'
Image|endswith: '\ifmap_windows.exe'
Image|endswith: '\mimikatz_windows.exe'
Image|endswith: '\netview_windows.exe'
Image|endswith: '\nmapAnswerMachine_windows.exe'
Image|endswith: '\opdump_windows.exe'
Image|endswith: '\psexec_windows.exe'
Image|endswith: '\rdp_check_windows.exe'
Image|endswith: '\sambaPipe_windows.exe'
Image|endswith: '\smbclient_windows.exe'
Image|endswith: '\smbserver_windows.exe'
Image|endswith: '\sniff_windows.exe'
Image|endswith: '\sniffer_windows.exe'
Image|endswith: '\split_windows.exe'
Image|endswith: '\ticketer_windows.exe'
Image|contains: '\goldenPac'
Image|contains: '\karmaSMB'
Image|contains: '\kintercept'
Image|contains: '\ntlmrelayx'
Image|contains: '\rpcdump'
Image|contains: '\samrdump'
Image|contains: '\secretsdump'
Image|contains: '\smbexec'
Image|contains: '\smbrelayx'
Image|contains: '\wmiexec'
Image|contains: '\wmipersist'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.