Office (OLE) malware analysis — malicious · bf7a376775b0683a

MALICIOUS

Office (OLE)

90.5 KB Created: 2010-02-03 20:42:00 Authoring application: Microsoft Office Word

MD5: 0e153c4f9a1849cead93c8e96a7edea5 SHA-1: d68afa2d0320dd37149501aaaa8e29bc6545ebe6 SHA-256: bf7a376775b0683a8cd82f73dacaf67a622c7cf11f016d461d7d512d6dedd72b

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

The file is a malicious Office document containing a large VBA macro. The 'AutoOpen' macro is present and triggers a 'Shell()' call, indicating an attempt to execute external commands. This is further supported by the 'VBA p-code auto-exec with execution tokens' heuristic. The presence of 'macros.bas' suggests the macro code itself is a key artifact. The ClamAV detection as 'Win.Trojan.Psycho-3' confirms its malicious nature. The macro likely downloads and executes a second-stage payload.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Psycho-3
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `965543e89880e30267b4809e5eec842cd52403dbb25ab05a62dee996bc2c4b2f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	27297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 143 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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