Ursnif — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 bcd1f5c937204708…

MALICIOUS

Office (OOXML) / .XLSM

254.0 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 3b617c6fc7c8e44fd883b814a10a6b22 SHA-1: 9ac9b0ae696a7a588d993296cf669e3a87d8c2a6 SHA-256: bcd1f5c937204708222662de05654d4a44e9cd120930ff5ea7367656e4bf1797
100 Risk Score

Malware Insights

Ursnif · confidence 95%

MITRE ATT&CK
T1218.010 System Binary Proxy Execution: Regsvr32 T1059.001 Command and Scripting Interpreter: PowerShell

The file is an XLSM document containing obfuscated text that, when processed, reveals a command to execute regsvr32. This command is used to download and run a DLL from the URL http://premiumstatics.co/con3cti0n.dll. The ClamAV heuristic specifically identifies this as a Ursnif variant, a known banking trojan family.

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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