Newly discovered APT Cyber Espionage Campaign called “Leafminer” from Iranian Hacker Group targeting the wide range of government organizations to steal the sensitive data such as Email Data, Files & Database servers Credentials.
This APT group using various types of attack tactics such as watering hole websites, vulnerability scans of network services on the internet, and brute-force/dictionary login attempts to infiltrate the target networks.
In this case, Groups of attackers using publicly available tools and malicious techniques using an exploits using published proofs-of-concept.
Industry verticals targeted by Leafminer
During the investigation of this APT Campaign, a toolkit was identified that is used in the group’s efforts of intrusion, lateral movement, and exfiltration.
A hosted server contains 112 files that could be accessed through a public web shell planted by the attackers and the files contain a logs that gathers from the vulnerability scans and post-compromise tools.
Interestingly fact is that, attackers using a list of 809 targets for vulnerability scans that was discovered during the Leafminer APT Campaign investigation.
Main Intrusion techniques used by Leafminer APT Campaign
Leafminer APT Campaign mainly using tree techniques to compromise the targeting networks.
- Compromised web servers used for watering hole attacks
- Scans/exploits for vulnerabilities of network services
- Dictionary attacks against logins of network services
Attackers employed the malicious email attachments and phishing emails for an initial stage of attacks.
Watering hole attacks
This attack is mainly used to steal the SMB credential hashes by using offline brute force attack, eventually hashes used to retrieve the original login passwords.
According to Symantec, When executing the code, the browser creates an invisible image tag and sets the URL to an attack server using the file:// protocol scheme. On Windows machines, this triggers a request to a remote server via the Samba networking protocol (SMB) that also transmits the user’s login NTLM hash.
Exploitation & Vulnerability Scan
Leafminer campaign actively developing with powerful toolkits that will be used for analyzing the group’s techniques and tools for vulnerability scans and exploitation.
Researchers from also Symantec observed attempts by Leafminer to scan for the Heartbleed vulnerability (CVE-2014-0160) from an attacker-controlled IP address.
Attackers using specifics toolkits to perform powerful dictionary attack for guessing passwords which are exposed by the target system.
This type of attack was observed both via dedicated servers set up by Leafminer as well as staging servers compromised by the group, Symantec said.
Also, you can read other attack factors and Indicator of compromise here.