Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 53f66b3253456d9f…

MALICIOUS

Office (OOXML) / .XLSM

136.7 KB
MD5: 051ba6e22dd888a1e5776ddef8575d67 SHA-1: caf7fc9a6a80fca52e92d62323cd34c417f3ff0c SHA-256: 53f66b3253456d9f0e6193d7d7d87382b387c36508d3e860c731c3994a55ae70
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The sample is an XLSM file containing VBA macros. The document body explicitly contains a PowerShell command designed to download an executable from 'sparepartiran.com' and then execute it. This indicates a downloader attack pattern. The presence of VBA macros and the PowerShell execution command are strong indicators of malicious intent.

Heuristics 6

  • ClamAV: Xls.Malware.Sagent-10035294-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sagent-10035294-0
  • 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.
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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://sparepartiran.com/js/2Q/90170.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4aba1d4ae3905f315ef1cab9d078434cda03e5641a8fc0c61b3516a72cbbc03c		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1700 bytes
vbaProject_00.bin
f786ddb41417bdeccd53d67315a7f31bc8c147df507314611b462d6c459544e6		 vba-project OOXML VBA project: xl/vbaProject.bin 5120 bytes
Detection
ClamAV: Xls.Malware.Sagent-10035294-0
Obfuscation or payload: unlikely

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