MAL-2026-17607

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/rubygems/lightinng-invoice/MAL-2026-17607.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17607
Published
2026-10-05T08:00:31Z
Modified
2026-10-06T01:00:16Z
Summary
Malicious code in lightinng-invoice (RubyGems)
Details

RubyGems runs this gem's native extension script ext/lightinng-invoice/extconf.rb during gem install. The script exits without action on CI runners and sandboxes, based on CI environment variables, the hostname, the username and the working directory. It continues if the system uptime is over 30 minutes and the home directory holds .ssh, .gitconfig, .npmrc, .gem/credentials or .bundle. It then decodes a Base64 Ruby payload and forks twice into a detached process. After 20 to 40 minutes the payload downloads http://45.138.12.177:8092/wgkit.tar.gz to /tmp/.w1.tgz with curl, extracts it to /tmp/.w1/, runs wg_install.sh with bash and deletes both. The payload stores the URL XOR-encoded with the key usv\x9a. The Ruby code in lib/ is a decoy. The RubyGems account reqthrottle_3474 published this gem and 41 others with the same loader on 2026-10-05.

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (38a3cbc58408f7b8e0edb2aa678ba4765867b535513e8609be0d87e93687eca3)

The gem lightinng-invoice is a typosquat of the Lightning/BOLT11 ecosystem (duplicated 'n', homepage lightinng-invoice.dev) whose advertised functionality is a decoy: lib/lightinng-invoice.rb exposes only a static word list and the declared native extension's C source is an empty 55-byte stub (Init_LightinngInvoice(void) {}). The sole operational code is in ext/lightinng-invoice/extconf.rb, which RubyGems auto-executes during gem install. That script evaluates a base64-encoded Ruby payload that XOR-decodes a hardcoded C2 URL (http://45.138.122.177:8092/wgkit.tar.gz), curls the tarball to /tmp/.w1.tgz, extracts it, and runs bash /tmp/.w1/wg_install.sh inside a double-forked detached child so execution survives the installer process. The dropper is gated with explicit anti-analysis checks: it refuses to fire in CI, on ephemeral/sandbox hostnames, under generated analyst usernames, in analysis paths (/tmp, /opt/rubygems, /workspace), when uptime is under 1800 seconds, or when developer-signal files are absent — it specifically requires the presence of ~/.ssh, ~/.gitconfig, ~/.npmrc, ~/.gem/credentials, and ~/.bundle before proceeding, then sleeps 1200+rand(1200) seconds before executing. The targeting pattern and secret-adjacent gating identify developer workstations with credentials as the intended victims.

Source: ossf-package-analysis (cde76db725f1a356a4594636391e02715ee39cf1a4691ba1b6165099cd6a4978)

The OpenSSF Package Analysis project identified 'lightinng-invoice' @ 1.0.0 (rubygems) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.
Database specific 
{
    "iocs":  {
        "files":  [
            {
                "digests":  {
                    "sha256":  "11824008bf69db2d8cdb07d308b3ed00184f6d62ae8fe0351a7b2fdf78462b3f"
                },
                "note":  "Native extension script that RubyGems runs at install time. It gates on the environment and starts the payload.",
                "paths":  [
                    "ext/lightinng-invoice/extconf.rb"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "note":  "Second-stage archive and install script downloaded and run by the payload.",
                "paths":  [
                    "/tmp/.w1.tgz",
                    "/tmp/.w1/wg_install.sh"
                ],
                "source":  "DROPPED"
            }
        ],
        "ips":  [
            "45.138.12.177"
        ],
        "urls":  [
            "http://45.138.12.177:8092/wgkit.tar.gz"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021050",
            "import_time":  "2026-10-05T16:22:54.90550648Z",
            "modified_time":  "2026-10-05T15:56:57Z",
            "sha256":  "38a3cbc58408f7b8e0edb2aa678ba4765867b535513e8609be0d87e93687eca3",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "import_time":  "2026-10-06T00:50:49.561948713Z",
            "modified_time":  "2026-10-05T08:00:31Z",
            "sha256":  "cde76db725f1a356a4594636391e02715ee39cf1a4691ba1b6165099cd6a4978",
            "source":  "ossf-package-analysis",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

RubyGems / lightinng-invoice

Package

Name
lightinng-invoice
Purl
pkg:gem/lightinng-invoice

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "ext/lightinng-invoice/extconf.rb",
            "sha256":  "11824008bf69db2d8cdb07d308b3ed00184f6d62ae8fe0351a7b2fdf78462b3f",
            "tlsh":  "9251cb5a8b8355f64db1d0d044755412fb667b0e60689864f3de0868bb55f2ac4f02fd"
        },
        {
            "path":  "metadata.yaml",
            "sha256":  "93217ee37a0796dfcfaf768814ecb98a78af27915d5dda8ff8c27f772fdb338f",
            "tlsh":  "3c2121c2f6caf4bbf643e6db58b9a30ba336d448ba95284188d784c1579903d160b201"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/rubygems/lightinng-invoice/MAL-2026-17607.json"