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XMR-Stak – Cryptocurrency Miner – SystemTek

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Found in March 2021, XMR-Stak is a cryptomining Trojan that targets susceptible Microsoft Alternate Server techniques with a ProxyLogon exploit. Compromised electronic mail techniques are used each to mine new currencies and as payload internet hosting servers for brand new infections.

XMR-Stak is described as a common stratum pool miner. The miner helps CPUs, AMD and NVIDIA GPUs and can be utilized to mine the cryptocurrencies Monero, Aeon and plenty of extra Cryptonight cash.

Weak Microsoft Alternate servers are first accessed utilizing a PowerShell command to obtain a ZIP archive file from the Outlook Internet Entry path of a beforehand compromised server. This file will not be a legit archive, however a batch script that, when executed, calls certutil.exe to obtain and decode two extra pretend ZIP archives.

The primary of those recordsdata is one other batch script that decodes the second file, which comprises the miner and its configuration knowledge, earlier than inserting it right into a operating course of. If profitable, the script will delete each itself and the opposite ZIP archives, leaving solely the continuing mining course of behind.

XMR-Stak configuration knowledge states that mining will solely begin if a TLS connection will be made to the attacker’s Monero pockets.

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Indicators of compromise

SHA256 hashes

  • 3ad9da14e7f7e68e31d6cb6a8cab13e1eb45cb147371edbf0e4ed3e5262b9f51
  • 3dabd3bf16f5856d504d0ae20d3d3c9c6c74ccee562964292bb4565dda91a0e8
  • 4324ba1ca3a4db940dee5de14644e31268df081047b2681b8e33a1f3da7bae9a
  • 54a37cc18dae575965f73cc260cedf5b2d4e356ab53070cc3577c6d0bf125211
  • 6539bbb8cbf33b050d544283f51ccc52ec040b62e3c706d20bd0fe4e221212e3

Duncan is a expertise skilled with over 20 years expertise in quite a lot of IT roles. He has an curiosity in cybersecurity and has a variety of different expertise in radio, electronics, and telecommunications.

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