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

Static analysis result for SHA-256 63fd18be20d6db92…

MALICIOUS

Office (OLE) / .XLS

17.5 KB Created: 2010-05-18 09:35:15 Authoring application: Microsoft Excel
MD5: a0dfdef52153d1326eb1c9b2b6c9e9a9 SHA-1: 470cf342d5b111966e1bfbd84abfc664bc79de92 SHA-256: 63fd18be20d6db92de36917ba9a98684a0cf86ddece771405c0a66226647c187
180 Risk Score

Malware Insights

Xls.Trojan.Escape · confidence 95%

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

This XLS file contains VBA macros, including an Auto_Open subroutine, which is a common technique for executing malicious code upon opening. The script attempts to copy itself to the Excel startup folder as 'StartUp.xls' to achieve persistence. It also manipulates sheet activation and key bindings to maintain its presence and potentially evade detection. The ClamAV detections further confirm its malicious nature.

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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