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

Static analysis result for SHA-256 50ef698ac9178a45…

MALICIOUS

Office (OLE) / .DOC

169.0 KB Created: 2010-06-10 13:17:00 Authoring application: Microsoft Word 9.0
MD5: 950b3cf6ad1df79d3b92bac945dc62f0 SHA-1: 431eb7a3edc4f0a7e2fe26c1caabf4cc841e051a SHA-256: 50ef698ac9178a459dbcf78fbe6923c2e173d0a424f95ae92daecd9de8e20ece
220 Risk Score

Malware Insights

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

The document contains a VBA macro, specifically triggered by the Document_Open event, which is a common technique for initial execution. The document body is presented as a survey about mobile phone usage, likely a lure to encourage macro execution. ClamAV detections indicate this is a known malicious document, identified as Doc.Trojan.Xaler-1. The macro's specific actions are not detailed, but its presence and the document's deceptive content strongly suggest it's designed to download and execute a secondary payload.

Heuristics 5

  • ClamAV: Doc.Trojan.Xaler-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Xaler-1
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
bd7ad196de6d3242ba12dfddb0c0c7e738db9800c00c435468a917520cc5c582
vba-macro oletools.olevba.extract_macros (decoded VBA source) 68301 bytes
Detection
ClamAV: Doc.Trojan.Xaler-1
Obfuscation or payload: likely
Carved artifact contains 10 Chr/ChrW string-construction calls.