MALICIOUS
220
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
The file contains Excel 4.0 macros, specifically an Auto_Open function, which is a known technique for executing malicious code. Heuristics indicate the presence of dangerous formula APIs and environment evasion, suggesting the macro attempts to download and execute a second-stage payload. The 'Macro/content-enable lure' heuristic further suggests the document is designed to trick users into enabling macros, a common characteristic of spearphishing attachments.
Heuristics 5
-
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.
-
XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FNExcel 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.
-
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.
-
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.
-
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) | 54073 bytes |
SHA-256: 23845eba9d2bb3e77a15932494c0c681e8096646f73b331b4923f807aa563448 |
|||
Preview scriptFirst 1,000 lines of the extracted script
' 0085 9 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - ' 0085 16 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - BUcRwss ' 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 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 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 !BV5730 ' 0018 23 LABEL : Cell Value, String Constant - aWLfVMak len=0 ' 0018 17 LABEL : Cell Value, String Constant - aX len=0 ' 0018 22 LABEL : Cell Value, String Constant - axhrxtG len=0 ' 0018 38 LABEL : Cell Value, String Constant - bgdoGHcdmLrVkRXqyoUPQOT len=0 ' 0018 41 LABEL : Cell Value, String Constant - BgEWiWUOgdzjuzwIZavwGeLoEk len=0 ' 0018 44 LABEL : Cell Value, String Constant - BHPfGFVLOGeImkSHbRIWgPPCDdmyb len=0 ' 0018 22 LABEL : Cell Value, String Constant - bIOhpfL len=0 ' 0018 48 LABEL : Cell Value, String Constant - biyZYoehZxbGElaulbpziiVWwGSuOsRjv len=0 ' 0018 55 LABEL : Cell Value, String Constant - BLRNZpFMOXupTVCIbjZFzzyEovDTttJyCtSvaYGu len=0 ' 0018 42 LABEL : Cell Value, String Constant - bQkbSfpYYMMmvIkEjHZlZWQifDm len=0 ' 0018 31 LABEL : Cell Value, String Constant - BsRuZXFtOFvJTDCp len=0 ' 0018 50 LABEL : Cell Value, String Constant - bUbGTSilogGUNxfhCejwIcpdPqNMnVmYcDd len=0 ' 0018 23 LABEL : Cell Value, String Constant - bVnkHdCt len=0 ' 0018 22 LABEL : Cell Value, String Constant - BWJTqlP len=0 ' 0018 39 LABEL : Cell Value, String Constant - bWnlIdCuqCThEqBYTwxeyEMC len=0 ' 0018 51 LABEL : Cell Value, String Constant - CcbrhkcBeJHodxnesDllYYzIVwRvUlxmjdvs len=0 ' 0018 35 LABEL : Cell Value, String Constant - cDZYBhzlpPpBuNKgDbTP len=0 ' 0018 23 LABEL : Cell Value, String Constant - CGIzZogR len=0 ' 0018 19 LABEL : Cell Value, String Constant - chFM len=0 ' 0018 22 LABEL : Cell Value, String Constant - ChFXjXU len=0 ' 0018 28 LABEL : Cell Value, String Constant - CosSGExQNjGek len=0 ' 0018 17 LABEL : Cell Value, String Constant - Cr len=0 ' 0018 33 LABEL : Cell Value, String Constant - csZfyHvbXXWaMFMqRD len=0 ' 0018 32 LABEL : Cell Value, String Constant - DDemybuayQcQOIaXt len=0 ' 0018 60 LABEL : Cell Value, String Constant - dHIovOWMrmnlqbipGhgwmpgGiOLthDsjxIqqddFNaCVBZ len=0 ' 0018 39 LABEL : Cell Value, String Constant - dKSTRWHBIlyxOSVMlBtdLNiL len=0 ' 0018 50 LABEL : Cell Value, String Constant - DLBgppotQXeJWVlorjIXQzikFhmzwfsSStC len=0 ' 0018 63 LABEL : Cell Value, String Constant - dotqCTUpqzYFixekEMChcdbgRKSvXIYceWvYDnjXsiZnxggT len=0 ' 0018 20 LABEL : Cell Value, String Constant - DpRnl len=0 ' 0018 48 LABEL : Cell Value, String Constant - DSZb ... (truncated) |
|||
Open this report in the interactive analyzer, or submit your own file for analysis.