Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 43691521aea38332…

MALICIOUS

Office (OLE) / .XLS

32.5 KB Created: 2005-01-30 14:52:14
MD5: e643c34243a7a28b7ea24c7a32fca804 SHA-1: 728bab02238b6360ea74bc0f80e58a6ced69c890 SHA-256: 43691521aea383324bf9d5782bdc0c8511736ffce571d20358f64b8e5e8b6a25
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is an XLS file containing a VBA macro, specifically an Auto_Open macro, which is a common technique for initial execution. ClamAV detections indicate it is a known malicious variant (Ppt.Malware.Laroux-10036124-0 and Xls.Trojan.Escape-1). The macro is likely responsible for downloading and executing a second-stage payload, although the specific actions are not detailed in the provided evidence.

Heuristics 4

  • ClamAV: Ppt.Malware.Laroux-10036124-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Ppt.Malware.Laroux-10036124-0
  • 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
7797f1de241b213d12517eeef284d88daac756a870f82df9db08b90245e8d7fc		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2356 bytes
Detection
ClamAV: Xls.Trojan.Escape-1
Obfuscation or payload: unlikely

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