MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file contains Excel 4.0 macros, specifically an Auto_Open defined name, which is a critical finding indicating potential malicious execution. The heuristics also indicate the use of dangerous formula APIs and environment evasion techniques. The macro sheet is likely designed to download and execute a secondary payload, though the specific commands are obfuscated.
Heuristics 4
-
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.
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) | 51692 bytes |
SHA-256: dff0686279bbd78d322ab436ee53dba7195e34cabb01dc6df868e534b0d5a256 |
|||
Preview scriptFirst 1,000 lines of the extracted script
' 0085 9 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - ' 0085 27 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - pSxvdSmcThraaNNowK ' 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 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 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 22 LABEL : Cell Value, String Constant - aehYxNG len=0 ' 0018 50 LABEL : Cell Value, String Constant - afndJRSQVszHkxwNRULkzscKNhKOcYHVuuV len=0 ' 0018 52 LABEL : Cell Value, String Constant - aqtwoNcVFnpKmrFPkxlXyVUvdugkLlwqJGcxW len=0 ' 0018 34 LABEL : Cell Value, String Constant - aQvqrpufmtKkkzqskKm len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d !IE54488 ' 0018 43 LABEL : Cell Value, String Constant - BbmgyvSoNFBNesOCLidHJpKPXNsC len=0 ' 0018 53 LABEL : Cell Value, String Constant - bmETablJEhjPWpwmSNOMRDJQhIHXNQIgJomUJd len=0 ' 0018 49 LABEL : Cell Value, String Constant - bmVUItVrESzRDHhVTNfcyVtyvHKZuvFPKn len=0 ' 0018 22 LABEL : Cell Value, String Constant - BxsKIeO len=0 ' 0018 35 LABEL : Cell Value, String Constant - cHiTjnphHjOyuiDtkyJr len=0 ' 0018 21 LABEL : Cell Value, String Constant - CmfmRe len=0 ' 0018 20 LABEL : Cell Value, String Constant - cMtwR len=0 ' 0018 63 LABEL : Cell Value, String Constant - CMuuhUuResZrdhHvsmFCYuTZVgjyUVfojNdvQjdTyHIGLwpw len=0 ' 0018 21 LABEL : Cell Value, String Constant - CxlHwn len=0 ' 0018 25 LABEL : Cell Value, String Constant - cyisyuHXYt len=0 ' 0018 38 LABEL : Cell Value, String Constant - CzFcjqVhhwBEvUjcMtwRtxM len=0 ' 0018 21 LABEL : Cell Value, String Constant - DgwdjD len=0 ' 0018 39 LABEL : Cell Value, String Constant - dgXwZFCkYtjaoyhh ... (truncated) |
|||
Open this report in the interactive analyzer, or submit your own file for analysis.