Office (OLE) / .DOC malware analysis — malicious · 1d39ad07d2b015a7

MALICIOUS

Office (OLE) / .DOC

110.5 KB Created: 2006-12-27 12:24:00 Authoring application: Microsoft Office Word

MD5: 9d0819f9610afe05bc0da7421e9cfc1c SHA-1: 0672c432fc7e5313219b6a263b5795dedb362403 SHA-256: 1d39ad07d2b015a714bb3e4a8997cec61ab71c0db451a221a0f8e7b9dd59f2d7

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Office document containing a VBA macro. Heuristics indicate the presence of a 'Document_Open' macro that uses 'CreateObject', suggesting it's designed to execute code upon opening. The macro source is obfuscated, but the combination of 'VBA Chr string obfuscation' and 'VBA auto-exec with execution terms' strongly suggests a malicious intent, likely to download and execute a second-stage payload. No specific family could be identified.

Heuristics 5

Document_Open macro high OLE_VBA_DOCOPEN

Document_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` `bcbdc23848945e68b2b149001c8681e0c742da401c3550458ff18ee6d5d0b4af`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	41366 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 26 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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