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SnakeKeylogger Fake Quote-Request Emails: Detection & IOCs

SnakeKeylogger arrives in quote-review emails and hollows aspnet_compiler.exe to log keystrokes. Includes 9 detection rules, 13 IOCs, a free Splunk SPL rule.

Read the full threat intel for SnakeKeylogger Fake Quote-Request Emails: Detection & IOCs →

Chapters

  1. 0:00The hookA quote request delivered an infostealer.
  2. 0:04The storyA purchasing email carried JavaScript.
  3. 0:10Attack pathReportedly, the recipient opens the archive.
  4. 0:27AttributionNo threat actor is attributed.
  5. 0:32Indicators of compromise10 indicators to hunt: 4 domains, 1 MD5 hash and 2 file names, and more.
  6. 0:39MITRE ATT&CK techniques14 ATT&CK techniques, from initial access to exfiltration.
  7. 0:44Remediation4 steps now: Block and search mail logs for the lure.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00A quote request delivered an infostealer.

0:05A purchasing email carried JavaScript.

0:07Then it hid inside a Microsoft tool.

0:10Reportedly, the recipient opens the archive.

0:13Then obfuscated PowerShell decrypts another stage.

0:17A loader hollows a Microsoft tool.

0:19It steals browser credentials and system details.

0:23It sends data out over SMTP.

0:28No threat actor is attributed. Confidence: low.

0:3210 indicators to hunt: 4 domains, 1 MD5 hash and 2 file names, and more.

0:3914 ATT&CK techniques, from initial access to exfiltration.

0:444 steps now: Block and search mail logs for the lure.

0:519 detection rules, in SPL, KQL and Sigma.

0:56Threadlinqs. The unified security engineering platform.