Doc.Trojan.Thus-8 — Office (OLE) malware analysis

Static analysis result for SHA-256 5c2e7e92bcc01a30…

MALICIOUS

Office (OLE)

50.5 KB Created: 2006-04-23 13:03:00 Authoring application: Microsoft Word 10.1
MD5: d95d94d0b7e78f15ee7bdfb2b9061d6f SHA-1: cb37e1c62723865531bff9ee11c440921eac52c8 SHA-256: 5c2e7e92bcc01a30e0738f0777629181bb4a57920e982e14d393b0e973190e62
180 Risk Score

Malware Insights

Doc.Trojan.Thus-8 · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The ClamAV detection 'Doc.Trojan.Thus-8' strongly suggests a known malware family. The macro code appears to be designed to ensure its own execution and potentially download further stages, indicated by the error handling and code manipulation logic.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • 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
  • 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
a5c6a312d435fbe0dbbdb44a7eb4b8ca28801dadc0b47266138cf2d5f32abe40		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2364 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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