Office (OLE) / .DOCX malware analysis — malicious · d514339e97bc6215

MALICIOUS

Office (OLE) / .DOCX

35.5 KB Created: 2000-10-31 09:02:00 Authoring application: Microsoft Word 9.0

MD5: 7643d2f9fc9a1f8fc71a32072d59f855 SHA-1: 9d74a4c48c02723431095832deede565e812a06c SHA-256: d514339e97bc62159316375ebeb752aee3d75fdbcf9a3df462d1b5c7e60b69f6

340 Risk Score

Malware Insights

MITRE ATT&CK

T1564.004 Disable or Modify Tools T1059.005 Visual Basic

The sample is a malicious DOC file containing VBA macros. The AutoOpen macro attempts to disable security features and export its own code to 'c:\cross.sys'. This suggests the macro is designed to prepare the system for or deliver a second-stage payload. The ClamAV detection as 'Doc.Trojan.Exceller-1' further supports its malicious nature.

Heuristics 8

ClamAV: Doc.Trojan.Exceller-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Exceller-1
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.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `aa7dcabb7a7adeb287dc8f068a492c936f6f915a47c01b269e3d3fef5201e1cd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6161 bytes
Detection ClamAV: Doc.Trojan.Exceller-1 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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