Exfiltration

GitPython versions prior to 3.1.52 are vulnerable to environment variable exfiltration when an attacker provides a crafted remote URL to the Repo.clone_from() method.

Adversaries frequently abuse the legitimate curl command-line utility to exfiltrate collected sensitive data to external Command and Control (C2) servers via network protocols.

Flyto-core versions prior to 2.26.7 allow unauthenticated callers to exfiltrate API provider keys by supplying a malicious 'base_url' parameter, which forces the library to append operator-configured secrets to requests sent to attacker-controlled infrastructure.

This threat brief details the detection of malicious Netcat usage within Linux containers, indicating potential backdoor establishment, persistence, command and control, or data exfiltration by adversaries.

An Elastic machine learning rule detects rare and unusual DNS queries that indicate potential malicious network activity, including initial access via phishing or malicious documents, persistence, command-and-control (C2) communication, or data exfiltration attempts by adversaries.

Elastic's Data Exfiltration Detection integration leverages machine learning to identify rare processes writing data to external devices, indicating potential data exfiltration by adversaries using benign-looking processes.

Elastic has released a machine learning detection rule designed to identify potential data exfiltration attempts by flagging anomalous spikes in the volume of data written to external devices, indicating illicit data copying or transfer activities by threat actors.

Elastic's machine learning job identifies potential data exfiltration activity to unusual geo-locations by detecting anomalies in network traffic patterns, indicating adversaries leveraging command and control channels to transfer data outside normal organizational patterns.

Elastic's machine learning rule detects potential data exfiltration by identifying anomalous network traffic, specifically large data transfers to unusual geo-locations via IP addresses, indicating possible exfiltration over command and control channels.

Unauthenticated attackers can exploit a time-based SQL Injection vulnerability (CVE-2026-14516) in the Bookly WordPress plugin, affecting versions up to and including 27.5, via the 'staff_ids' parameter, chaining requests to `bookly_get_form_id` and `bookly_render_time` to extract sensitive database information due to insufficient input escaping and lack of CSRF protection.

A vulnerability in GitPython allows environment variables to be exfiltrated when using `Repo.create_remote()` or `Remote.add()`, where attacker-supplied URLs are processed by `Git.polish_url()` expanding sensitive environment variables into the URL, which is then stored in `.git/config` and transmitted to an attacker-controlled host.

A vulnerability, CVE-2026-54673, in `electron-builder`'s `builder-util-runtime` package, specifically in its HTTP redirect handler, allows credential headers like `PRIVATE-TOKEN` (GitLab personal access tokens) and mixed-case `Authorization` tokens to be improperly forwarded to attacker-controlled cross-origin redirect destinations, resulting in credential disclosure and enabling unauthorized access to private GitLab resources.

A high-severity vulnerability in n8n's embed login feature (CVE-2026-XXXX) allows attackers to achieve full account takeover by leveraging unverified email claims in incoming tokens, enabling authentication as any existing user if the instance has embed login enabled and a trusted key source configured that emits unverified email addresses.

Elastic has developed a detection rule that monitors non-allowlisted `wget` activity on Linux hosts using Auditd Manager or Auditbeat, leveraging an Elastic LLM to triage `wget` executions for potential ingress tool transfer, command and control, or data exfiltration attempts to untrusted destinations, generating alerts only for high-confidence positive or suspicious verdicts.

Elastic's LLM-based detection rule identifies suspicious `curl` activity on Linux systems, aiming to detect command and control, data exfiltration, or ingress tool transfer by analyzing command-line parameters and network destinations via Auditd Manager or Auditbeat logs, which, if left unaddressed, could lead to system compromise or data breach.

This threat brief details how Linux systems making DNS queries to commonly abused top-level domains may indicate malware-related command and control (C2) communications, data exfiltration, or payload downloads, often blending into normal name resolution, signaling a potential compromise of servers, workstations, or containerized workloads.

This high-severity threat involves adversaries publishing messages to an AWS SNS topic using compromised credentials, identified when a user or role performs this action for the first time, potentially facilitating phishing campaigns, data exfiltration, or lateral movement within an AWS environment.

Adversaries with write access to an AWS S3 bucket can abuse replication rules via the PutBucketReplication API call to silently exfiltrate large volumes of data to attacker-controlled accounts, bypassing object-level access controls.

An adversary can leverage the AWS `rds:StartExportTask` API to export sensitive RDS database snapshots or DB cluster data to an attacker-controlled Amazon S3 bucket, facilitating data exfiltration and potential data theft from organizations.

Adversaries with existing AWS access may exfiltrate sensitive data by sharing Amazon Machine Images (AMIs) containing secrets, bash histories, or code artifacts with external, attacker-controlled AWS accounts, detectable via `ModifyImageAttribute` actions in AWS CloudTrail logs.

Adversaries may exfiltrate sensitive data by leveraging compromised AWS credentials to perform the DynamoDB ExportTableToPointInTime operation, moving database contents into an Amazon S3 bucket, which facilitates unauthorized collection and exfiltration of information.

A critical vulnerability, CVE-2026-56259, in Crawl4AI versions prior to 0.8.8 allows attackers to exploit unauthenticated Docker API server endpoints by manipulating the `base_url` and `api_token` parameters, leading to credential exfiltration and authentication bypass.

A vulnerability in the `Tesla.Middleware.FollowRedirects` component of the `tesla` Elixir HTTP client library allows `Authorization` headers to be leaked during cross-origin redirects due to a case-sensitive comparison, enabling an attacker controlling a redirect destination to receive bearer tokens or other credentials from applications using `tesla` versions 0.6.0 through 1.18.2.

This brief details the technique of DNS exfiltration where threat actors use chunked DNS queries with subdomain labels following an 'index-payload.base_domain' pattern to exfiltrate data from compromised Windows hosts, allowing them to bypass volume-based detection and extract sensitive information.

The BadPatch malware family utilizes SMTP on TCP port 26 for covert command and control of Windows systems, an atypical port for SMTP, posing a significant risk of unauthorized access and data exfiltration.

A detection rule identifies suspicious outbound IPSEC NAT Traversal (NAT-T) tunnels, characterized by UDP traffic where both source and destination ports are 4500, originating from an internal host to an external destination, a technique frequently abused by threat actors to establish covert command and control channels or exfiltrate data while evading network defenses.

A malicious actor or misconfigured legitimate user can modify an Amazon ECR repository or registry policy to grant public access using a wildcard principal (`Principal:"*"`), which can lead to the exfiltration of proprietary container images and embedded secrets, or facilitate supply-chain implantation if push permissions are also granted.

This brief details the detection of malicious processes executing from non-standard or temporary Windows directories that initiate network communication with public file-sharing or code repository domains, often indicative of data exfiltration or Command and Control (C2) activities by various threat actors.

A low-privilege user with a freshly-provisioned SSO account in Netflix's Lemur certificate management service (versions <= 1.9.0) can exploit a Server-Side Request Forgery (SSRF) vulnerability in the ACME authority creation endpoint to reach the AWS EC2 Instance Metadata Service (IMDS), exfiltrating AWS STS credentials, and leveraging a creator-equality Insecure Direct Object Reference (IDOR) vulnerability for permanent access to PKI private keys, resulting in AWS IAM compromise and persistent certificate access.

This analytic identifies potential AWS S3 exfiltration behavior by correlating multiple risk events related to Collection and Exfiltration techniques, leveraging AWS sources and focusing on instances where multiple unique analytics and distinct MITRE ATT&CK IDs are triggered for a specific risk object.

The rule detects script interpreters (osascript, Node.js, Python) making outbound connections to AWS S3 or CloudFront domains on macOS, which may indicate command and control or data exfiltration activity.

Between May 11th and May 12th of 2026, a threat actor compromised an npm publish token to publish 18 malicious versions of the '@beproduct/nestjs-auth' package (versions 0.1.2 through 0.1.19) containing payloads from the Mini Shai-Hulud npm supply-chain worm campaign that exfiltrated npm tokens, GitHub PATs/OAuth tokens, AWS credentials, and Vault tokens, impacting developer environments.

The rule detects when a private GitHub repository's visibility is changed to public, potentially indicating exfiltration of sensitive code or data and unauthorized access.

Adware Doctor, a popular app available on the Mac App Store, surreptitiously steals user's browsing history from Safari and Chrome, compresses the data into a password-protected zip archive, and exfiltrates it to a remote server.

A remote attacker can exploit a compromised Bitwarden CLI npm package to steal credentials and exfiltrate sensitive information.

A coordinated campaign uses 108 malicious Chrome extensions to steal user data, inject ads, and establish backdoors on over 20,000 systems via a shared command-and-control infrastructure.

A single user rapidly cloning a high number of GitHub repositories indicates potential exfiltration of sensitive data such as proprietary code, embedded secrets, and build artifacts.

Kimsuky is using malware that leverages the Dropbox API for command and control, enabling file exfiltration and remote code execution.

A user subscribing to an SNS topic using a new protocol may indicate data exfiltration or unauthorized access by an adversary aiming to collect sensitive information or exfiltrate data.

An AWS RDS DB snapshot is shared with another AWS account or made public, potentially enabling unauthorized access, offline analysis, or data exfiltration by allowing adversaries to restore the snapshot in their controlled infrastructure.

Detection of S3 bucket replication configurations sending data to a different AWS account, potentially indicating unauthorized data exfiltration by adversaries abusing replication rules.

An AWS Elastic Block Store (EBS) snapshot is shared with another AWS account or made public, potentially leading to data exfiltration and persistence operations.

An AWS Amazon Machine Image (AMI) being shared with another AWS account could indicate data exfiltration, as AMIs may contain sensitive data, and unauthorized sharing can lead to exposure.

An attacker modifies an Amazon S3 bucket policy to grant access to an external AWS account, potentially leading to unauthorized data access and exfiltration.

Modification of a Google Cloud Platform (GCP) Logging sink is detected, potentially indicating an adversary's attempt to exfiltrate logs to an unauthorized destination or impair defenses by disabling or modifying cloud logs.

Detection of AWS API activity from rare S3 client applications (S3 Browser, Cyberduck), potentially indicating unauthorized data exfiltration by threat actors.

This rule detects rare network connections via the SMB protocol to external networks, where SMB is commonly abused to exfiltrate data or leak NTLM credentials via UNC path injection.

This rule detects the use of wget on Linux systems to upload files to an external server, a tactic commonly used for data exfiltration.

Adversaries may copy device files, including configurations and packet captures, from Cisco ASA devices via CLI or ASDM for reconnaissance, credential extraction, or data exfiltration, which can be detected via command execution logs.

An attacker creates an Amazon EC2 Traffic Mirroring session to capture and exfiltrate sensitive network traffic from EC2 instances, potentially including unencrypted data.

An adversary may change a private GitHub repository to public visibility to exfiltrate sensitive code or data, potentially indicating a compromise or unauthorized access, and immediately fork or mirror the repo to an external account to retain access and harvest embedded secrets.

This rule detects GenAI processes performing encoding or chunking (base64, gzip, tar, zip) followed by outbound network activity, indicating data preparation for exfiltration.

A comprehensive analysis of Mac malware discovered in 2017, detailing infection vectors, persistence mechanisms, features, and goals, including FruitFly, MacDownloader (iKitten), and others.

An adversary may export RDS snapshots to Amazon S3 to exfiltrate sensitive data outside of RDS-managed storage, potentially bypassing database access controls and leading to unauthorized data theft.

The rule detects the abuse of rclone, a legitimate file synchronization tool, potentially renamed to evade detection, to exfiltrate data to cloud storage or remote endpoints, using copy/sync commands and specific file filters.

An attacker enables S3 bucket replication to exfiltrate data to an external AWS account by creating a bucket replication rule.

Detects the initial export of an AWS DynamoDB table to S3, potentially indicating reconnaissance or exfiltration by a compromised account or insider threat.

This rule detects the use of database dumping utilities to exfiltrate data from a database on Linux systems, where attackers may attempt to dump the database to a file and then exfiltrate the file to a remote server.

This rule detects SMTP traffic on TCP port 26, an alternative to the standard port 25 that the BadPatch malware family has used for command and control of Windows systems.

Attackers or malicious insiders may leverage remote tools and the NFC protocol to download virtual machine disk files from ESXi datastores, potentially leading to sensitive data exfiltration.

This analytic detects the execution of a PowerShell script designed to capture screen images on a host, leveraging PowerShell Script Block Logging to identify specific script block text patterns associated with screen capture activities, potentially indicating an attempt to exfiltrate sensitive information via desktop screenshots.

Adversaries may abuse the Windows Certreq utility to download files or upload data to a remote URL by making an HTTP POST request, potentially for command and control, defense evasion, or exfiltration.

This rule identifies when an SNS topic message is published by a rare user in AWS, which may indicate lateral movement, data exfiltration, or phishing campaigns, potentially leading to resource hijacking and impact on cloud services.

This correlation identifies potential AWS S3 exfiltration behavior by correlating multiple risk events related to Collection and Exfiltration techniques, triggered when multiple analytics and distinct MITRE ATT&CK IDs are triggered for a specific risk object, indicating a potential data exfiltration attempt.

This rule detects the first time a removable device is seen on a Windows host by monitoring registry modification events related to USB devices, aiding in the detection of potential data exfiltration or initial access attempts.

Successful GetBlob operations on Azure Storage Accounts using the AzCopy user agent with SAS token authentication can indicate data exfiltration by adversaries abusing compromised SAS tokens.

An attacker with compromised AWS credentials or EC2 instance access can leverage EC2 export functionalities (CreateInstanceExportTask, ExportImage, or CreateStoreImageTask) to exfiltrate sensitive data by exporting EC2 instances or their images to external storage.

This rule detects network events indicating the use of Windows file sharing (SMB or CIFS) traffic to the Internet, which is commonly exploited for initial access, backdoor deployment, or data exfiltration.

Detection of medium-sized registry hive files being created or modified on Server Message Block (SMB) shares, potentially indicating exfiltration of Security Account Manager (SAM) data for credential extraction.

This rule detects AWS API activity originating from uncommon desktop client applications based on the user agent string, specifically S3 Browser and Cyberduck, which provide bulk upload/download capabilities and have been observed in use by threat actors for data exfiltration, warranting validation against authorized data transfer workflows.

An AWS S3 bucket policy was modified to grant public access using a wildcard (Principal:"*") statement, potentially allowing data exfiltration or malicious content hosting.

Detection of unusual DynamoDB scan activity in AWS environments, potentially indicating exfiltration of sensitive information by an adversary using compromised credentials or a rogue insider.