REDLEAVES_DroppedFile_ImplantLoader_Starburn

YARA detection rule by USG · NOASSERTION

Detects the DLL responsible for loading and deobfuscating the DAT file containing shellcode and core REDLEAVES RAT

rule REDLEAVES_DroppedFile_ImplantLoader_Starburn {
    meta:
        description = "Detects the DLL responsible for loading and deobfuscating the DAT file containing shellcode and core REDLEAVES RAT"
        author = "USG"
        reference = "https://www.us-cert.gov/ncas/alerts/TA17-117A"
        true_positive = "7f8a867a8302fe58039a6db254d335ae"         id = "976f42b1-58c9-554b-97e6-130a657507e2"
    strings:
        $XOR_Loop = {32 0c 3a 83 c2 02 88 0e 83 fa 08 [4-14] 32 0c 3a 83 c2 02 88 0e 83 fa 10}     condition:
        any of them
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

1a64db2f-fc39-4d8b-a4e5-e57a484ef474

Propose edits, view related rules, and engage with the community through comments.

Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

Community Discussion