Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f265a5bfaaf337d7…

MALICIOUS

Office (OLE)

42.0 KB Created: 2009-02-19 15:28:00 Authoring application: Microsoft Word 11.5.3
MD5: f3aa7c6621bc2ca300a86655dcc40697 SHA-1: aba41490e2cf4a1aa1bea11c9b9c30f0b6366cf2 SHA-256: f265a5bfaaf337d77b37091ffd37d00ad4cb777585171324def0985ff56cef94
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.003 Windows Command Shell

The document contains a geography quiz, a common lure for users to enable macros. The presence of VBA macros and a critical heuristic firing for Shell() calls indicates that the macros are designed to execute arbitrary commands. ClamAV detections 'Doc.Trojan.Ded-3' and 'Doc.Trojan.Ded-1' further confirm the malicious nature of the file and its extracted components. The primary intent appears to be the execution of a second-stage payload via the Shell() function.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Ded-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Ded-3
  • 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
c450d595e711e17b8d427b8f361bfe6bedf58650c1652677654654739ea24339
vba-macro oletools.olevba.extract_macros (decoded VBA source) 3827 bytes
Detection
ClamAV: Doc.Trojan.Ded-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.