Irański APT OilRig używa nowego backdoora Saitama

Pod koniec kwietnia 2022, Fortinet and Malwarebytes security researchers discovered a malicious Excel document sent by the OilRig hacker group (also known as APT34, Helix Kitten, and Cobalt Gypsy) to a Jordanian diplomat to inject a new backdoor called Saitama.

The phishing email came from a hacker disguised as an employee of the IT department of the Ministry of Foreign Affairs. The attack was discovered after the recipient forwarded the email to a real IT employee to verify the authenticity of the email.

Like many of these attacks, the email contained a malicious attachment. jednak, the attached threat was not ordinary malware. Zamiast, it had the capabilities and methods commonly associated with targeted attacks (APTs).powiedział Fortinet researcher Fred Gutierrez.

According to research notes provided by Fortinet, the macro uses WMI (Windows Management Instrumentation) to query its command and control (do&do) server and is capable of producing three files: a malicious PE file, a configuration file, and a legitimate DLL file. Written in .NET, ten Saitama backdoor uses the DNS protocol to communicate with C&C and exfiltrate data, which is the stealthiest method of communication. Methods of masking malicious packets in legitimate traffic are also used.

Przypomnę, że również to zgłosiliśmy Cross-platform SysJoker backdoor attacks Windows, macOS i Linux i to Hakerzy wysyłają rekruterom CV ze złośliwym oprogramowaniem more_eggs.

Malwarebytes also published a separate backdoor report, noting that the entire program flow is explicitly defined as a state machine. In simple words, the machine will change its state depending on the command sent to each state.

States include:

  1. The initial state in which the backdoor receives the launch command;
  2. Livestate, in which the backdoor connects to the C&serwer C, waiting for a command;
  3. Sleep mode;
  4. Receiving state, in which the backdoor accepts commands from the C&serwer C;
  5. Operational state in which the backdoor executes commands;
  6. Submission state, in which the results of command execution are sent to attackers.
Malwarebytes researchers believe that the backdoor targets a specific victim, and that the attacker has some knowledge of the internal infrastructure of the target’s systems.

Helga Smith

Zawsze interesowałem się informatyką, zwłaszcza bezpieczeństwo danych i motyw, który nazywa się obecnie "nauka o danych", od moich wczesnych lat nastoletnich. Przed dołączeniem do zespołu usuwania wirusów jako redaktor naczelny, Pracowałem jako ekspert ds. cyberbezpieczeństwa w kilku firmach, w tym jeden z kontrahentów Amazona. Kolejne doświadczenie: Uczę na uniwersytetach Arden i Reading.

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