Import LDAP Data Interchange Format File Via Ldifde.EXE

Severity: medium
Author: @gott_cyber
Source: upstream

Detects the execution of "Ldifde.exe" with the import flag "-i". The can be abused to include HTTP-based arguments which will allow the arbitrary download of files from a remote server.

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1218` System Binary Proxy Execution
Command & Control	`T1105` Ingress Tool Transfer

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Image|endswith: '\ldifde.exe'
OriginalFileName: ldifde.exe

Stage 2: `all of selection_cli`

CommandLine|contains: -f
CommandLine|contains: -i

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.

Field	Kind	Values
`CommandLine`	match	`-f` corpus 5 (sigma 5) `-i` corpus 6 (sigma 6)
`Image`	ends_with	`\ldifde.exe` corpus 3 (sigma 3)
`OriginalFileName`	eq	`ldifde.exe` corpus 2 (sigma 2)