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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

  • 764bda58296b8a08b4b3580be3c85d55
  • a1090b66f1672140b733cd51b908f480
  • ff78d8bb9599aab5499aec11060c5a52

SHA-256

  • 42bd7dc5a8889d9ccca97af1bf726a1572714360b090ecd4b1b94fd299ab031d
  • f7d6763baff3161e1c81942dc2dd51115f74b0f2076708ef41e1c4adcb533501
  • b52667bbd4f7c03e8384a218fd44ff9fc76741a25baf8b658205191433914baa

SHA-1

  • 5a6b59d7c72f8e6c8ba2dae79b40515ece9c099e
  • 2d574b642c1049645373315bf01c31b6cf2209e7
  • 0d3c255f9cdd9e123c91e7819ad2e318a0aedea0

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.