Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Severity
Medium
Analysis Summary
A new cyber attack campaign targets organizations around the world to spread a cryptocurrency miner for monetary purposes. The vector of this campaign is a variant of Vools (Trojan.Win32.VOOLS.SMAL01), which is an EternalBlue-based backdoor used to deliver cryptocurrency miners and other malware.
Analysts found that all of the compromised machines were running outdated versions of Microsoft Windows OS so they were still vulnerable to already patched vulnerabilities.
Many other tools were also found in the infected systems, mainly the password dumping tool Mimikatz and Equation group tools. The final payload deployed on compromised systems is a cryptocurrency miner. Researchers also found that compromised systems appear to be on internal segments of compromised networks.
The retrieved sample seems to be an installer which sends an HTTP request to the following server:
log.boreye[.]com/ipc.html?mac={MAC address}&ip={IP address}&host={host}&tick=6min&c=error_33
Another common thing among compromised machines is that there was a file located in the main Windows folder of all the infected machines:
C:\Windows\NetworkDistribution\Diagnostics.txt. The file extension .txt is meant to avoid detection. The file actually is a ZIP archive file that contains several files (the Equation toolkit components).
All these files are variants of the open-source XMRig (Monero) miner.
The usernames used are very similar and all of them use the same password, which means the threat actor is the same. The miner always uses the name dllhostex.exe. Furthermore, the binary is always located either in the “system32” or in the “SysWOW64” folder of the infected Windows machine, depending on the miner variant.
Roughly 83% of affected computers were running Windows Server 2003 SP2. (outdated)
South Asian countries like China, India and Vietnam are among the top targets and the targeted industries include education, communication and media, banking, manufacturing, and technology.
Impact
Indicators of Compromise
URLs
Malware Hash (MD5/SHA1/SH256)
Remediation