Ursnif — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 3baaef9a9ab94014…

MALICIOUS

Office (OOXML) / .XLSM

254.0 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 426ba9357eef05ee7a13de758d6d79e7 SHA-1: cba7b5ddaf0b79df6e9a3c59cdbb51e9ae9d4a77 SHA-256: 3baaef9a9ab940148e7dbe70bf1333114f0fb41a7c73261585295b585197637a
100 Risk Score

Malware Insights

Ursnif · confidence 95%

MITRE ATT&CK
T1218 System Binary Proxy Execution T1218.010 System Binary Proxy Execution: Regsvr32

The file is an XLSM document containing a heuristic firing for LOLBin command execution, specifically involving regsvr32. The document body explicitly contains a command to execute a DLL from the URL http://premiumstatics.co/con3cti0n.dll using regsvr32. This indicates the document is a dropper designed to download and execute a second-stage payload.

Heuristics 3

  • ClamAV: Doc.Dropper.UrsnifIT1220-9803735-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.UrsnifIT1220-9803735-0
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://premiumstatics.co/con3cti0n.dll

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