We found new samples of Mirai targeting IP cameras and DVRs with exposed ports and default credentials. Like its predecessors, it allows attackers remote access and the use of infected devices to form a botnet for DDoS attacks. However, the C&Cs were traced back to the Tor network, keeping the cybercriminals’ identities anonymous and protecting the servers from being shut down despite discovery.
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Elasticsearch is no stranger to cybercriminal abuse given its popularity and use to organizations. In fact, this year’s first quarter saw a surge of attacks — whether by exploiting vulnerabilities or taking advantage of security gaps — leveled against Elasticsearch servers. These attacks mostly delivered cryptocurrency-mining malware, as in the case of one attack we saw last year.
The latest attack we spotted deviates from the usual profit-driven motive by delivering backdoors as its payload. These threats can turn affected targets into botnet zombies used in distributed-denial-of-service (DDoS) attacks.
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We found a threat that scans for open ports and brute forces systems with weak credentials to drop a Monero cryptocurrency miner. While the installation and mining process is hidden by old evasion tool XHide Process Faker, the malware can be used for bigger attacks in the future as both the shellbot and miner can be monetized.
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We observed a recent campaign that primarily targets financial institutions and governmental organizations in the South American region, particularly in Colombia. This blog post covers the activities we observed, the remote access tools (RATs) used, the campaign’s techniques and procedures, and its indicators of compromise (IoCs). Our findings indicate that the campaign appears to be the work of a group involved in business email compromise (BEC) or cybercrime, and unlikely to be an advanced persistent threat (APT).
Read More In our analysis, we observed that a user account with less privilege can gain administrator rights over the automation server if jobs are built on the master machine (i.e., the main Jenkins server), a setup enabled by default. An exploit for this can be easily written using shell spawn — a default build step. If an exploit is successfully deployed, an attacker can perform remote code execution (RCE) on the master, which can result to Jenkins being completely overwritten.
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