Valyria — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 e0c9c16c4d7cd53b…

MALICIOUS

Office (OOXML) / .XLSM

2.06 MB Created: 2020-02-01 18:28:07 UTC Authoring application: Microsoft Excel 12.0000
MD5: aff2c78f7ab70e1aee2d7b159a11ca16 SHA-1: ef52f6065a0389dd491d4c9b805d9531cd5759a9 SHA-256: e0c9c16c4d7cd53ba9c4e56058f0ee4a84972d93065689a0efe90d0eeaf2c28b
102 Risk Score

Malware Insights

Valyria · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file is an XLSM document containing VBA macros, as indicated by the OOXML_VBA heuristic. ClamAV detection identifies it as 'Xls.Dropper.Valyria-10030821-0', suggesting it functions as a dropper. The presence of an embedded OLE object further supports its malicious nature. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 4

  • ClamAV: Xls.Dropper.Valyria-10030821-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Valyria-10030821-0
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Large OOXML part skipped info SCAN_INCOMPLETE
    One or more high-value OOXML parts exceeded the scanner's per-entry size cap and may not have been fully inspected.

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