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

Static analysis result for SHA-256 d009299a787cf9b7…

MALICIOUS

Office (OOXML) / .XLSM

102.2 KB Created: 2021-08-19 14:03:52 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-09-27
MD5: 7be5d4eb35c7c840b3693f3a98f7f6b4 SHA-1: f89a114ee85546ee6bc43f17ed08256407d80c57 SHA-256: d009299a787cf9b7995827014e72525038eecd3e1f99820d66854fc865d39047
342 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The Workbook_Open macro executes a command using cmd.exe to download a file from the URL "http://45.155.165.63/tq/loader/uploads/Product_Details_018_RFQ.exe" and save it as "Zcldxvqciopgykje.exe.exe", which is then immediately executed. This indicates a downloader or dropper functionality, consistent with the ClamAV detection of 'Xls.Dropper.EPPlus-9802867-2'.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • ClamAV: Xls.Dropper.EPPlus-9802867-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.EPPlus-9802867-2
  • 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.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — 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://45.155.165.63/tq/loader/uploads/Product_Details_018_RFQ.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
8aef08d09e4483557c520dfce1361b543aa837c75d16e9b4eab5deccebba65a2		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1133 bytes
vbaProject_00.bin
fcc3b1948fb4165a6587760fe01d6557ea3f33b19df8b767109e0ec2c3bc5b4a		 vba-project OOXML VBA project: xl/vbaProject.bin 5632 bytes
Detection
ClamAV: Xls.Dropper.EPPlus-9802867-2
Obfuscation or payload: unlikely

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