Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eecc6be7651443f1…

MALICIOUS

Office (OLE)

37.5 KB Created: 2006-10-20 23:15:00 Authoring application: Microsoft Word 10.0
MD5: 7c43551d3b3eb92fe2af3bf1263e8eda SHA-1: 03a0605d1a3cf10f8d72dfe49c6b25668a4c40c3 SHA-256: eecc6be7651443f1182677116735c48773d0e4454f960be988880e3f534c7dba
240 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing VBA macros. A critical heuristic indicates the presence of a Shell() call within the VBA code, suggesting it attempts to execute external commands. The document body presents a nomination form, likely a social engineering lure to trick the user into enabling macros. The extracted artifact 'macros.bas' is the VBA macro source. The ClamAV detections 'Doc.Trojan.Marker-31' and 'Doc.Trojan.Marker-3' further confirm its malicious nature. The primary attack vector appears to be macro execution leading to arbitrary command execution.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • 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.
  • 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
3ac76d43279520328cd28a5e1d875c9b903e325294156c73126a82fe89431509		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5320 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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