Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 06e7078eb216bb29…

MALICIOUS

Office (OLE)

35.0 KB Created: 2020-11-25 10:45:51 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: b7d881bdc1361b0b1457a58415ce8d26 SHA-1: d7ec09c4a122a837b11d839cb1982ec36d853e79 SHA-256: 06e7078eb216bb297940c99aa80d05af563ff562739eaae8959dafdf1a89aa0a
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is an Excel file containing Excel 4.0 macros, specifically an Auto_Open defined name. This indicates the file is designed to automatically execute code upon opening. The presence of dangerous formula APIs like RUN in the Auto_Open macro strongly suggests it's intended to download and execute a secondary payload, a common technique for malware delivery.

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6618 bytes
SHA-256: 6f6859555738866c42920cbf904d1db6db09661660e3711454fcd297b4996bec
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  mECtNuFpPsn
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E148 
' 0018     23 LABEL : Cell Value, String Constant - BADnRNOM len=0 
' 0018     22 LABEL : Cell Value, String Constant - DjcosQh len=0 
' 0018     20 LABEL : Cell Value, String Constant - dquzr len=0 
' 0018     25 LABEL : Cell Value, String Constant - esAwhNnozI len=0 
' 0018     22 LABEL : Cell Value, String Constant - gqTNDkj len=0 
' 0018     26 LABEL : Cell Value, String Constant - gTOboocQdYg len=0 
' 0018     22 LABEL : Cell Value, String Constant - gzPfseE len=0 
' 0018     24 LABEL : Cell Value, String Constant - hasERMUKj len=0 
' 0018     22 LABEL : Cell Value, String Constant - hngPZvR len=0 
' 0018     25 LABEL : Cell Value, String Constant - khmPbAEUEj len=0 
' 0018     25 LABEL : Cell Value, String Constant - KpAkcPONAv len=0 
' 0018     24 LABEL : Cell Value, String Constant - kzTTRxLQB len=0 
' 0018     22 LABEL : Cell Value, String Constant - ljvSBgU len=0 
' 0018     26 LABEL : Cell Value, String Constant - mtCMbfmwzbm len=0 
' 0018     25 LABEL : Cell Value, String Constant - pDsOShGDKk len=0 
' 0018     20 LABEL : Cell Value, String Constant - sjsBl len=0 
' 0018     20 LABEL : Cell Value, String Constant - TrnlL len=0 
' 0018     23 LABEL : Cell Value, String Constant - VoEaSauo len=0 
' 0018     21 LABEL : Cell Value, String Constant - vVaIfI len=0 
' 0018     22 LABEL : Cell Value, String Constant - xfVYheI len=0 
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LA
... (truncated)

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