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Income Tax Department Fake Notice Malware: Detection & IOCs

Fake Income Tax penalty notices sent on WhatsApp deliver a ZIP lure that fetches a second stage; 28 IOCs, 9 detection rules and a free Splunk SPL rule.

Read the full threat intel for Income Tax Department Fake Notice Malware: Detection & IOCs →

Chapters

  1. 0:00The hookAbout 31 lookalike domains hit taxpayers.
  2. 0:04The storyForged penalty notices arrive.
  3. 0:11Attack pathLookalike domains host the forged notice.
  4. 0:24AttributionNo threat actor is attributed.
  5. 0:29Indicators of compromise27 indicators to hunt: 1 IP, 18 domains and 1 URL, and more.
  6. 0:36MITRE ATT&CK techniques16 ATT&CK techniques, from resource development to command and control.
  7. 0:42Remediation3 steps now: Block the listed lookalike domains, vss2[.]oss-cn-hongkong[.]aliyuncs[.]com.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00About 31 lookalike domains hit taxpayers.

0:05Forged penalty notices arrive.

0:07Download Documents delivers malware.

0:11Lookalike domains host the forged notice.

0:14An Android app intercepts SMS messages.

0:17A signed Windows file poses as Service Host.

0:20It fetches a second stage.

0:25No threat actor is attributed. Confidence: low.

0:2927 indicators to hunt: 1 IP, 18 domains and 1 URL, and more.

0:3616 ATT&CK techniques, from resource development to command and control.

0:423 steps now: Block the listed lookalike domains, vss2[.]oss-cn-hongkong[.]aliyuncs[.]com.

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

0:56Threadlinqs. The unified security engineering platform.