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

Static analysis result for SHA-256 e5833c38bc92d772…

MALICIOUS

Office (OOXML) / .XLSM

34.0 KB Created: 2022-05-08 22:43:08 UTC Authoring application: Microsoft Excel Online 16.0300 First seen: 2022-05-09
MD5: e319449125b40a37f10f9335bc8f3ae3 SHA-1: 07ac01b370b064a94ea53cada5c313e1fd33c8aa SHA-256: e5833c38bc92d77252e85bc60581b58f471bf3232da3db6be698c84cfc54570b
382 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1059.003 Windows Command Shell

The Workbook_Open macro executes a command using cmd.exe to download a file named 'scan_pay.exe' from a Discord CDN URL using certutil.exe. This downloaded executable is then immediately run. The ClamAV detection 'Xls.Dropper.EPPlus-9802867-2' further confirms its malicious nature as a dropper.

Heuristics 9

  • 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
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 https://cdn.discordapp.com/attachments/965633483689058304/973004464539713566/scan_pay.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5dd1257ac60c45157564b02d932020a72cdad9ce4e295640225a62e15c6203cd		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1144 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
0e54ad85de1801bdd641145bdd0d1b64e8dd229b72d297787816327b265b5778		 vba-project OOXML VBA project: xl/vbaProject.bin 5632 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.