Xls.Virus.Valyria-10004391-0 — Office (OOXML) / .XLSX malware analysis

Static analysis result for SHA-256 8ac6cf0e0b180cdd…

MALICIOUS

Office (OOXML) / .XLSX

1.60 MB Created: 2024-07-04 03:50:22 UTC Authoring application: Microsoft Excel 16.0300
MD5: ae122b1c68b916b0be9d21ec31f04865 SHA-1: 56f2606d3b2164569ac4c9c531bbccf9ae07c2b7 SHA-256: 8ac6cf0e0b180cddab82e6b26e25b54ecc56daea95cb41c566e937e8da1c84a6
180 Risk Score

Malware Insights

Xls.Virus.Valyria-10004391-0 · confidence 95%

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1059.005 Visual Basic

The sample is an Excel file containing VBA macros, specifically an Auto_Open macro, which is a common technique for executing malicious code. ClamAV signatures confirm this file is malicious, identifying it as Xls.Virus.Valyria-10004391-0. The presence of the Auto_Open macro indicates an attempt to immediately run embedded malicious scripts when the document is opened.

Heuristics 4

  • ClamAV: Xls.Virus.Valyria-10004391-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Virus.Valyria-10004391-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a952b99482b0c1553a38b5c5c925360a64e7e248d8393a84f101fcada75ef358		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1463 bytes
vbaProject_00.bin
d185efd2a5cea9892f0a9326b8c8b4300657c52f12dd64e601a430ed233c9f63		 vba-project OOXML VBA project: xl/vbaProject.bin 17920 bytes
Detection
ClamAV: Xls.Virus.Valyria-10004391-0
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.