Office (OLE) malware analysis — malicious · 8fe525a8fff755cf

MALICIOUS

Office (OLE)

879.0 KB Created: 2009-10-25 18:14:00 Authoring application: Microsoft Word 11.2

MD5: 54c600d28738d8b04a82c9f4be7f154b SHA-1: 289095ac800b806aa32750b706b6dfdebdf2a8cc SHA-256: 8fe525a8fff755cf4a46950f640879e57729f113f7ebfd51ec1ad91500877419

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File

The file contains VBA macros, with a critical heuristic indicating the use of the Shell() function, suggesting it's designed to execute arbitrary commands. The ClamAV detection 'Doc.Trojan.Marker-31' and the suspicious extracted artifact 'macros.bas' further confirm its malicious nature. The document body, disguised as an official notice from the Colorado Department of Education, is a common social engineering tactic to trick users into enabling macros. The embedded URL is likely part of the lure or a secondary payload delivery mechanism.

Heuristics 6

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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.cde.state.co.us/index_home.htm

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `2637b14e6c3dd6aec28c8da77bfb2d97d284e2840689f78203791dbc6b70f487`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6941 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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