AN1146: Analytic 1146
Unusual access or copying of files from mounted network drives (e.g., NFS, CIFS/SMB) by user shells or scripts followed by large data transfer.
Detection strategies and analytics from ATT&CK where present.
Results are validated against normalized ATT&CK source records when available; sample records are used only in development or empty-data environments.
Unusual access or copying of files from mounted network drives (e.g., NFS, CIFS/SMB) by user shells or scripts followed by large data transfer.
Detection of file access from mounted SMB shares followed by copy or exfil commands from Terminal or script interpreter processes.
Monitor DNS queries, proxy logs, and user-agent strings for anomalous patterns associated with adversary attempts to hide infrastructure. Defenders may observe DNS resolutions to short-lived domains, abnormal WHOIS registration data, or filtering of known defensive/responder IP addresses.
Detect adversaries filtering traffic or modifying server responses to evade scanning. Monitor iptables, nftables, or proxy configurations that deny or redirect requests from known scanning agents or defensive tools.
Monitor unified logs for manipulation of proxy configurations, DNS resolution, or filtering rules. Adversaries may redirect responses or use trusted domains that later resolve to malicious C2 infrastructure.
Inspect network telemetry for adversary attempts to blend malicious traffic with legitimate flows using VPNs, proxies, or geolocation spoofing. Defensive teams may observe anomalous tunnels, encrypted sessions to suspicious domains, or geo-mismatched IP activity.
Monitor VM-level DNS and network traffic logs for adversary-controlled domains or selective response behavior (e.g., dropped requests from security scanners).
Unusual access to bash history, registry credentials paths, or private key files by unauthorized or scripting tools, with correlated file and process activity.
Reading of sensitive files like .bash_history, /etc/shadow, or private key directories by unauthorized users or unusual processes.
Unusual access to ~/Library/Keychains, ~/.bash_history, or Terminal command history by unauthorized processes or users.
Unusual web-based access or API scraping of password managers, single sign-on sessions, or credential sync services via browser automation or anomalous API tokens.
Unauthorized API or console calls to retrieve or reset password credentials, download key material, or modify SSO settings.
Access to container image layers or mounted secrets (e.g., Docker secrets) by processes not tied to entrypoint or orchestration context.
Use of configuration backup utilities or CLI access to dump plaintext passwords, local user hashes, or SNMP strings.
Programmatic or excessive access to file shares, SharePoint, or database repositories by users not typically interacting with them. This includes abnormal access by privileged accounts, enumeration of large numbers of files, or downloads of sensitive content in bursts.
Command-line tools (e.g., curl, rsync, wget, or custom Python scripts) used to scrape documentation systems or internal REST APIs. Unusual access patterns to knowledge base folders or shared team drives.
Abuse of SaaS platforms such as Confluence, GitHub, SharePoint Online, or Slack to access excessive internal documentation or export source code/data. Includes use of tokens or browser automation from unapproved IPs.
Access of mounted cloud shares or document repositories via browser, terminal, or Finder by users not typically interacting with those resources. Includes script-based enumeration or mass download.
Detects AppleScript execution via 'osascript', NSAppleScript/OSAScript APIs, and abnormal application control events across user sessions. Focuses on causal chains such as osascript spawning child processes, script-induced keystrokes, or API-backed dialog spoofing.
Repeated invocation of high-resource application endpoints or GUI components causing CPU and memory spikes, logged as elevated request volumes, prolonged handle locks, or frequent crash recoveries.
Automated scripts or repeated CLI/API requests that trigger application backends to consume high CPU or memory (e.g., Apache/PHP, MySQL, mail servers), resulting in syslog errors and excessive process spawning.
Repetitive triggering of GUI or backend application workflows that cause increased CPU/memory usage, logged in unified logs as spin reports or crash dumps.
Automated abuse of cloud-hosted applications (e.g., web apps, REST endpoints, internal APIs) causing compute exhaustion, high 5xx error rates, or frequent autoscaling triggers logged in app insights or cloudwatch.
Detects FTP, SMB, or TFTP traffic initiated by suspicious processes like PowerShell, cmd.exe, or rundll32.exe—especially with large outbound file transfers or unbalanced traffic volume.
Detects usage of FTP, SCP, or TFTP by non-interactive shells or automation scripts transferring large data volumes to untrusted IPs.
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