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Rewterz Threat Alert – Oski Data Stealer Malware – Active IOCs

Severity

High

Analysis Summary

An emergent and effective data-harvesting tool dubbed Oski is proliferating in North America and China, stealing online account credentials, credit card numbers, crypto wallet accounts, and more. The malware is still in its developing phase but packs a punch with its capabilities. Oski C2’s dashboard revealed that Oski’s theft tactics involve extracting credentials using man-in-the-browser (MitB) attacks by hooking the browser processes using DLL injection, It also extracts credentials from the registry, passwords from the browser SQLite database, and stored session cookies of all stripes, including crypto-wallet cookies from Bitcoin Core, Ethereum, Monero, Litecoin, and others.

Impact

  • Credential Theft
  • Unauthorized Access

Indicators of Compromise

MD5

  • 1e7fb5b88e03a00155382ac541895ce9
  • 759800afe649da5a0d1df75858cfd2f

SHA-256

  • b880562f296840a44bae0076351fc36900111aae24d8d44c6bf7a893a7d143cd
  • b58070865242b3cfe3203ee6cb76439b14c6a317c4838d11709ce967910d92f4

SHA-1

  • e983109329d66538c817b2e1da117ab2291c9bf9
  • 80807ba70352ae5567b209a3c16641a30b877171

Remediation

  • Block all threat indicators at your respective controls.
  • Always be suspicious about emails sent by unknown senders.
  • Never click on the links/attachments sent by unknown senders.
  • Search for IOCs in your environment.