Windows_Trojan_SiestaGraph_ad3fe5c6

rule Windows_Trojan_SiestaGraph_ad3fe5c6 {
    meta:
        author = "Elastic Security"
        id = "ad3fe5c6-88ba-46cf-aefd-bd8ab0eff917"
        fingerprint = "653ca92d31c7212c1f154c2e18b3be095e9a39fe482ce99fbd84e19f4bf6ca64"
        creation_date = "2023-09-12"
        last_modified = "2023-09-20"
        threat_name = "Windows.Trojan.SiestaGraph"
        reference = "https://www.elastic.co/security-labs/siestagraph-new-implant-uncovered-in-asean-member-foreign-ministry"
        reference_sample = "fe8f99445ad139160a47b109a8f3291eef9c6a23b4869c48d341380d608ed4cb"
        severity = 100
        arch_context = "x86, arm64"
        scan_context = "file, memory"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $a1 = "GetAllDriveRootChildren" ascii fullword
        $a2 = "GetDriveRoot" ascii fullword
        $a3 = "sendsession" wide fullword
        $b1 = "status OK" wide fullword
        $b2 = "upload failed" wide fullword
        $b3 = "Failed to fetch file" wide fullword
        $c1 = "Specified file doesn't exist" wide fullword
        $c2 = "file does not exist" wide fullword
    condition:
        6 of them
}