Xls.Trojan.Escape — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 144c532a7267de2f…

MALICIOUS

Office (OLE) / .XLS

15.0 KB Created: 2010-05-18 13:07:30 Authoring application: Microsoft Excel
MD5: 4e1cbf93ac412b14a63798ced116c239 SHA-1: f956af0b9037c221fbe9577b569cfb6e72ee96d2 SHA-256: 144c532a7267de2fad60cb0e9f863c268ccd522055f68c579bf2cab8df5f2af1
180 Risk Score

Malware Insights

Xls.Trojan.Escape · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The critical heuristic 'OLE_VBA_AUTO' indicates the presence of an Auto_Open macro, which is executed automatically when the Excel file is opened. The VBA script copies itself to the Excel startup directory as 'StartUp.xls', establishing persistence. This behavior is characteristic of a downloader or dropper malware.

Heuristics 4

  • ClamAV: Xls.Trojan.Escape-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Escape-2
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b1dc6e799f600e1fe03c12ee5c927d9c20e72385747b65f9e697c96da1cbf849		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1767 bytes
Detection
ClamAV: Xls.Trojan.Escape-1
Obfuscation or payload: unlikely

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