Techniques › T1486 › AN0603
AN0603 Analytic 0603
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Encryption via custom or open-source tools (e.g., openssl, gpg, aescrypt) recursively targeting user or system directories. Also includes overwrite of existing data and ransom note drops.</p>
- Detects
- T1486 Data Encrypted for Impact
- Part of
- DET0215 Detection of Multi-Platform File Encryption for Impact
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| auditd:SYSCALL | openat, write, rename, unlink | DC0061 File Modification |
| auditd:SYSCALL | execve | DC0032 Process Creation |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
FilenamePattern | Look for creation of ransom note files (e.g., READ_ME.txt, HELP_DECRYPT.html). |
SyscallBurstRate | High write/open/unlink activity in short intervals indicates encryption attempts. |
DirectoryTargeted | Correlate activity in /home, /etc, /opt, or mounted volumes. |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2009-3960 | Adobe BlazeDS | Mapped |
| CVE-2015-8651 | Adobe Flash Player | Mapped |
| CVE-2016-1019 | Adobe Flash Player | Mapped |
| CVE-2019-11634 | Citrix Workspace Application and Receiver for Windows | Mapped |
| CVE-2020-1472 | Microsoft Netlogon | Mapped |
| CVE-2021-34473 | Microsoft Exchange Server | Mapped |
| CVE-2021-42258 | BQE BillQuick Web Suite | Mapped |
| CVE-2021-44228 | Apache Log4j2 | Mapped |
| CVE-2021-45046 | Apache Log4j2 | Mapped |
| CVE-2022-22947 | VMware Spring Cloud Gateway | Mapped |
| CVE-2023-0669 | Fortra GoAnywhere MFT | Mapped |
| CVE-2023-27532 | Veeam Backup & Replication | Mapped |
| CVE-2023-28252 | Microsoft Windows | Mapped |
| CVE-2023-36884 | Microsoft Windows | Stale |
| CVE-2023-38831 | RARLAB WinRAR | Mapped |