Office (OLE) / .DOC malware analysis — malicious · 461c2319f7e0e21e

MALICIOUS

Office (OLE) / .DOC

1007.5 KB Created: 2020-10-05 15:45:00 Authoring application: Microsoft Office Word

MD5: b561fbf8ae81e67486213b97ec7d6ffa SHA-1: dca568b7aa7569e1fb42396f9e94eda75d739ca7 SHA-256: 461c2319f7e0e21e97225203d4aa719e5b43cf3df88c27a64747be7aed774015

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing a large VBA macro. Heuristics indicate the macro uses Windows Script Host and executes code via the Auto_Close function, suggesting it's designed to run automatically upon opening or closing the document. The presence of 'macros.bas' and the 'Chr string obfuscation' heuristic further support the macro's malicious intent, likely to download and execute a second-stage payload.

Heuristics 7

ClamAV: Doc.Malware.Generic-9775351-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9775351-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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` `f1897de60624319b61a27674d906cb49f7a52eb2f2114a7f1af9cd1f632c63d6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	78198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 Chr/ChrW string-construction calls.

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