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

Static analysis result for SHA-256 91ad6c91f6227d62…

MALICIOUS

Office (OOXML) / .XLSM

719.0 KB Created: 2023-01-22 11:25:16 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-01-27
MD5: 305025d50f56eac6c75a754ecf97d914 SHA-1: 6c699c747f0fa0cd7c0f6171276f2cc6d1567292 SHA-256: 91ad6c91f6227d6223135684f4ca76a206f105edb7fa992d406a9b2da337cf63
402 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is an XLSM file containing a Workbook_Open macro that executes a PowerShell command. This command downloads a file from the URL http://3.121.219.193/pin/P0-2025185-dtd-26-01-2023.exe to a temporary location and then executes it. This behavior is indicative of a downloader or initial access stage for further malicious activity.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell 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
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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://3.121.219.193/pin/P0-2025185-dtd-26-01-2023.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
eec45d3bf286fdd7fb7056328a88fa24050418670f339390a37467453423e07d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1260 bytes
vbaProject_00.bin
0a17f0544d7c1ad86260b9dfcfe2f080b8b60c07e142bff2ab30d44f77d94c68		 vba-project OOXML VBA project: xl/vbaProject.bin 5120 bytes
Detection
ClamAV: Xls.Dropper.EPPlus-9802867-2
Obfuscation or payload: unlikely

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