Xls.Dropper.EPPlus-9802867-2 — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 00367d927216bdf6…

MALICIOUS

Office (OOXML) / .XLSM

431.1 KB Created: 2021-08-19 14:03:52 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-04-20
MD5: 49a2939cf3f41a5f15848196509bba05 SHA-1: 60978fac75ab4b6e3d688dca0b0ef3a0b60c726c SHA-256: 00367d927216bdf6e8d8e9d825efce6f356f469e5358e604bd26d2e9396e27de
342 Risk Score

Malware Insights

Xls.Dropper.EPPlus-9802867-2 · confidence 95%

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 batch script from the URL http://3.70.247.229/dash/loader/uploads/TC_0166302.bat and then executes it. This indicates the Excel file is a dropper designed to fetch and run a second-stage payload.

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://3.70.247.229/dash/loader/uploads/TC_0166302.bat

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1356f86a5b325acc4746bb3cc5c6945be8177dc02e58a49d1a794bc620c670c1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1117 bytes
vbaProject_00.bin
dd8dca8087409f170180466cb9548a60753a9d4baed706bb3c0cba3bc8a618b2		 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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