Rewterz Threat Alert – Amadey Botnet – Active IOCs

Severity

Medium

Analysis Summary

Amadey is a botnet, a type of malicious software that infects computers and turns them into “bots” or “zombies” that can be controlled remotely by an attacker. Botnets are often used to carry out cyber attacks, such as spamming, distributed denial-of-service (DDoS) attacks, and data theft. The Amadey trojan can also download additional malware. and exfiltrate user information to a command and control (C2) server. Moreover, it can engage the victim’s system. The threat actor sent spam emails that reference a package or shipment. Many of the emails claim in the subject line that the package or shipment is from the shipping company DHL. For example, “You have a package coming from DHL.” The bodies of all of the emails we observed in this campaign are blank. Each email has a ZIP attachment containing a Visual Basic Script (VBS) file. Each file name for the ZIP files is a series of numbers separated by an underscore, such as 044450_64504154.zip. The VBS files have the same name as their ZIP file, except they have the VBS extension rather than the ZIP extension.

Amadey has been observed targeting a wide range of organizations, including government agencies, financial institutions, and technology companies. The Amadey botnet is a sophisticated and flexible threat that poses a significant risk to organizations and individuals. To defend against Amadey and other botnets, it is important to keep software up to date, follow best practices for cybersecurity, and to use a combination of security tools and services.

Impact

• Information Theft
• Exposure of Sensitive Data

Indicators of Compromise

MD5

• 3f1163d234c9c78476dd320a6b61ee4f
• 15d148f9e6fbcc05e16c013fb5ce8c3e
• b187ca3ff2e9e19465732f52549ce3b4
• f283cf3a964dad0f00f62925bc736f51

SHA-256

• 1a74d537af761a00dabc74fd911d5f3984a229e4829ddcee27d4fe81b0a2a837
• 334354895ae64611ef0d50f749a1d8e0aaca3d3653e43212df33a0d70f9ab010
• 081cbca548b0bd8a0142a7316b0171c4612d9113262dcd6fc2ecfe4370c99b9a
• e7c62cef016330c1753267044ff028e2d540daa80d59c2e3281fc157732e088d

SHA-1

• 794ea7bbc7dcd1ac4981496dadd3fd6824dc54a3
• 68cb749c4e71cf9d7d93dd445c82e51a9995cdb6
• e04b3e6f8dd98962dad434a9a0bcd3c44b7aaedf
• 56c9d1db41ea171a88d02f53cb77288f1ce0421c

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
• Maintain Offline Backups – In a ransomware attack, the adversary will often delete or encrypt backups if they have access to them. That’s why it’s important to keep offline (preferably off-site), encrypted backups of data and test them regularly.
• Emails from unknown senders should always be treated with caution.
• Never trust or open ” links and attachments received from unknown sources/senders.
• Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
• Along with network and system hardening, code hardening should be implemented within the organization so that their websites and software are secure. Use testing tools to detect any vulnerabilities in the deployed codes.
• Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets