Office (OLE) / .DOC malware analysis — malicious · 27c00fb44f4804fb

MALICIOUS

Office (OLE) / .DOC

43.0 KB Created: 2000-09-11 18:47:00 Authoring application: Microsoft Word 8.0

MD5: e578984fcc3cfeebb14d91c4a57d77bf SHA-1: 9e6d938b4717399c2ba215c2b4effaed1d806a8c SHA-256: 27c00fb44f4804fb1bbb219c7651cb1ed2c32122f895992c76ce5769c53477be

260 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is an OLE document containing VBA macros, with a critical 'Shell()' call detected. The 'Document_Open' macro suggests automatic execution upon opening. The embedded artifact 'macros.bas' is identified as a VBA macro. The document body contains a warning that the file is infected, which is a common social engineering tactic to prompt users to enable macros or bypass security. The presence of a Shell() call indicates the macro likely attempts to execute a secondary payload.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
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.
OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY

OLE file is 44,032 bytes but its declared streams total only 21,731 bytes — 22,301 bytes (51%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
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` `49375563a38a48019cb49522eb6fb103bf9ea3110ac8ead034826b16a707c445`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5388 bytes
Detection ClamAV: Doc.Trojan.Marker-1 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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