Ursnif — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 394be2c267fbafe7…

MALICIOUS

Office (OOXML) / .XLSM

171.6 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: c703a60cc728c2f139c06dca1755c642 SHA-1: 05cadcc7229d1272fb6e54e24099145b171a2d7c SHA-256: 394be2c267fbafe7dea30ba0364d0196ae39ef1eccc241b3afcb60bc561e7e85
100 Risk Score

Malware Insights

Ursnif · confidence 95%

MITRE ATT&CK
T1218.010 System Binary Proxy Execution: Regsvr32 T1059.003 Command and Scripting Interpreter: Windows Command Shell

The file is an XLSM document containing a malicious payload. The document body explicitly contains a command to execute 'regsvr32' with a URL pointing to a DLL, indicating a dropper functionality. ClamAV detection confirms this as a known Ursnif variant. The primary IOC is the URL used for payload delivery.

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://premialestat.co/con3cti0n.dll

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