MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.005 Visual Basic
The sample is an Excel 4.0 macro sheet that uses an Auto_Open macro for execution. It employs environment evasion techniques and includes a lure to trick users into enabling macros. The document body contains a message suggesting it is protected and requires content to be enabled, which is a common social engineering tactic.
Heuristics 4
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools 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.
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XLM Auto_Open environment-evasion close gate critical OLE_XLM_ENVIRONMENT_EVASION_CLOSEExcel 4.0 macro sheet auto-executes environment checks with GET.WORKSPACE / GET.WINDOW, then shows a fake corruption/error message and closes the workbook when the host fails those checks. This is a malware sandbox-evasion pattern, even when the later payload stage is hidden behind obfuscated defined-name flow.
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook 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.
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 106220 bytes |
SHA-256: b8a72f3cc6b53a7e58adb99c9331d98d727af5104d8190ec45b2b8c3151bfc08 |
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Preview scriptFirst 1,000 lines of the extracted script
' 0085 17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - CxmHwnCM ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 23 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - yHvbXXWaMSZqRQ ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet2 ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d CxmHwnCM!BR59546 ' 0018 24 LABEL : Cell Value, String Constant - bNoLXlTkW len=0 ' 0018 21 LABEL : Cell Value, String Constant - bQvrrq len=0 ' 0018 24 LABEL : Cell Value, String Constant - CDBGdjqVi len=0 ' 0018 21 LABEL : Cell Value, String Constant - CMSOaq len=0 ' 0018 24 LABEL : Cell Value, String Constant - cMtwRtxMW len=0 ' 0018 21 LABEL : Cell Value, String Constant - cyVtlh len=0 ' 0018 20 LABEL : Cell Value, String Constant - CZrRr len=0 ' 0018 21 LABEL : Cell Value, String Constant - DKMVsn len=0 ' 0018 22 LABEL : Cell Value, String Constant - eDgLuqf len=0 ' 0018 24 LABEL : Cell Value, String Constant - EETXaSqGy len=0 ' 0018 23 LABEL : Cell Value, String Constant - efdiGNUy len=0 ' 0018 22 LABEL : Cell Value, String Constant - eTyuuty len=0 ' 0018 23 LABEL : Cell Value, String Constant - fNPkNRfp len=0 ' 0018 21 LABEL : Cell Value, String Constant - foMtWm len=0 ' 0018 23 LABEL : Cell Value, String Constant - FRsNrQiI len=0 ' 0018 22 LABEL : Cell Value, String Constant - GMIUXlH len=0 ' 0018 20 LABEL : Cell Value, String Constant - GNUkL len=0 ' 0018 21 LABEL : Cell Value, String Constant - GYVrbm len=0 ' 0018 22 LABEL : Cell Value, String Constant - gztjPYY len=0 ' 0018 23 LABEL : Cell Value, String Constant - hhwBEuUj len=0 ' 0018 23 LABEL : Cell Value, String Constant - htWpVsLX len=0 ' 0018 20 LABEL : Cell Value, String Constant - hxCEv len=0 ' 0018 21 LABEL : Cell Value, String Constant - IhITNf len=0 ' 0018 24 LABEL : Cell Value, String Constant - IHXbdVuKC len=0 ' 0018 22 LABEL : Cell Value, String Constant - IitnGDZ len=0 ' 0018 23 LABEL : Cell Value, ... (truncated) |
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