Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4336cbb330d3b3a2…

MALICIOUS

Office (OLE)

607.5 KB Created: 1999-10-13 17:55:51 Authoring application: Microsoft PowerPoint
MD5: 2ab5c7d602c7f7fed5613edb058e23b6 SHA-1: 88453132b35352b534a162522e8d63c88842b8c0 SHA-256: 4336cbb330d3b3a2127f076c4acb0d025f14862a27d435bbbc073434b0229da5
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a PowerPoint file containing VBA macros, as indicated by the OLE_VBA_MACROS heuristic. The presence of CreateObject and GetObject calls suggests the macros are attempting to interact with the system or download external content. The ClamAV detection as 'Doc.Trojan.Hopper-7' strongly indicates malicious intent. The extracted artifact 'macros.bas' and the VBA Chr string obfuscation further support that the macros are designed to execute malicious code, likely a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Trojan.Hopper-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hopper-7
  • 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.
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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
f79a78416cbf9251c8f5bbd96a9552ad328b60b6a646346ff827f77bd220b30d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6115 bytes
Detection
ClamAV: Doc.Trojan.Hopper-7
Obfuscation or payload: likely
Carved artifact contains 11 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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