Cервис управления информационной безопасностью
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MITRE ATT&CK - Инструмент Ebury
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Ebury
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Ebury

Ebury is an SSH backdoor targeting Linux operating systems. Attackers require root-level access, which allows them to replace SSH binaries (ssh, sshd, ssh-add, etc) or modify a shared library used by OpenSSH (libkeyutils).(Citation: ESET Ebury Feb 2014)(Citation: BleepingComputer Ebury March 2017)(Citation: ESET Ebury Oct 2017)
ID: S0377
Type: MALWARE
Platforms: Windows
Version: 1.3
Created: 19 Apr 2019
Last Modified: 23 Apr 2021

Techniques Used
Domain ID Name Use
Enterprise T1071 .004 Application Layer Protocol: DNS

Ebury has used DNS requests over UDP port 53 for C2.(Citation: ESET Ebury Feb 2014)

Enterprise T1059 .006 Command and Scripting Interpreter: Python

Ebury has used Python to implement its DGA.(Citation: ESET Ebury Oct 2017)

Enterprise T1132 .001 Data Encoding: Standard Encoding

Ebury has encoded C2 traffic in hexadecimal format.(Citation: ESET Ebury Feb 2014)

Enterprise T1568 .002 Dynamic Resolution: Domain Generation Algorithms

Ebury has used a DGA to generate a domain name for C2.(Citation: ESET Ebury Feb 2014)(Citation: ESET Ebury Oct 2017)
Enterprise T1573 .001 Encrypted Channel: Symmetric Cryptography

Ebury has encrypted C2 traffic using the client IP address, then encoded it as a hexadecimal string.(Citation: ESET Ebury Feb 2014)
Enterprise T1574 .006 Hijack Execution Flow: Dynamic Linker Hijacking

Ebury has injected its dynamic library into descendent processes of sshd via LD_PRELOAD.(Citation: ESET Ebury Oct 2017)
Enterprise T1562 .001 Impair Defenses: Disable or Modify Tools

Ebury can disable SELinux Role-Based Access Control and deactivate PAM modules.(Citation: ESET Ebury Oct 2017)
.006 Impair Defenses: Indicator Blocking

Ebury can hook logging functions so that nothing from the backdoor gets sent to the logging facility.(Citation: ESET Ebury Feb 2014)

Enterprise T1556 .003 Modify Authentication Process: Pluggable Authentication Modules

Ebury can deactivate PAM modules to tamper with the sshd configuration.(Citation: ESET Ebury Oct 2017)
Enterprise T1553 .002 Subvert Trust Controls: Code Signing

Ebury has installed a self-signed RPM package mimicking the original system package on RPM based systems.(Citation: ESET Ebury Feb 2014)
Enterprise T1552 .004 Unsecured Credentials: Private Keys

Ebury has intercepted unencrypted private keys as well as private key pass-phrases.(Citation: ESET Ebury Feb 2014)

Groups That Use This Software
ID Name References
G0124 Windigo

(Citation: ESET Ebury Oct 2017)

References

  1. M.Léveillé, M.. (2014, February 21). An In-depth Analysis of Linux/Ebury. Retrieved April 19, 2019.
  2. Cimpanu, C.. (2017, March 29). Russian Hacker Pleads Guilty for Role in Infamous Linux Ebury Malware. Retrieved April 23, 2019.
  3. Vachon, F. (2017, October 30). Windigo Still not Windigone: An Ebury Update . Retrieved February 10, 2021.
  4. Bilodeau, O., Bureau, M., Calvet, J., Dorais-Joncas, A., Léveillé, M., Vanheuverzwijn, B. (2014, March 18). Operation Windigo – the vivisection of a large Linux server‑side credential‑stealing malware campaign. Retrieved February 10, 2021.
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