MALICIOUS
208
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic for Applications
T1059.001 PowerShell
T1204.002 Malicious File
T1105 Ingress Tool Transfer
The sample is an XLSM file containing Excel 4.0 macros, which are known to be used for malicious purposes. The critical heuristic 'OOXML_XLM_DANGEROUS_FN' indicates the use of dangerous XLM formula APIs like FORMULA and EXEC, which can be used to download and execute payloads. The presence of URLs pointing to .dat files suggests a download mechanism for a second-stage payload. The Auto_Open macro further indicates that the malicious code is designed to execute automatically upon opening the document.
Heuristics 7
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Excel 4.0 macro sheet (3 sheet(s)) critical OOXML_XLM_MACROSHEETSpreadsheet 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.
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Dangerous XLM formula APIs: FORMULA, HALT, GOTO, REGISTER, EXEC critical OOXML_XLM_DANGEROUS_FNExcel 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.
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Auto_Open macro high OLE_VBA_AUTOAuto_Open macro
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VBA project inside OOXML medium OOXML_VBADocument contains vbaProject.bin — VBA macros present
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Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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Hidden worksheet (hidden) low OOXML_HIDDEN_SHEETExcel workbook contains 3 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
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Embedded URL info EMBEDDED_URLOne 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://190.14.37.27/44313,6048108796.dat
- http://45.12.32.224/44313,6048108796.dat
- http://45.138.157.166/44313,6048108796.dat
- http://190.14.37.27/
- http://45.12.32.224/
- http://45.138.157.166/
- http://schemas.openxmlformats.org/spreadsheetml/2006/main
- http://schemas.microsoft.com/office/excel/2006/main
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/markup-compatibility/2006
- http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
- http://schemas.microsoft.com/office/spreadsheetml/2014/revision
- http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision3
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision6
Extracted artifacts 5
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.bas575cff377c7ce9d2de7685d876b3a2e3b5d44fd0e98df30551dc0a89c078d748 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source from OOXML) | 2220 bytes |
vbaProject_00.bin2d07b82507fab53c31f819941ee14e51eedaebebf234cd704dd73ad782aca889 |
vba-project | OOXML VBA project: xl/vbaProject.bin | 17408 bytes |
xlm_sheet_00.xml4b541eb16854fe12203dcacfe068687f6e4b61c7316db7fb9e2ba695ebb3cfaa |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/sheet1.xml | 4155 bytes |
xlm_sheet_01.xml75cb5bc00f344f305f75bbbcb076dfbef840999cdacdab06b49b508e12c29f0e |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/sheet2.xml | 2140 bytes |
xlm_sheet_02.xmldde6292619407cd5e321eae6ffce78ceda2ffd7b35d4633b1ff6c5c7a78eb139 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/sheet3.xml | 1839 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 2 shell/COM execution token(s).
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