Office (OLE) / .DOC malware analysis — malicious · ce3b1bca503c7038

MALICIOUS

Office (OLE) / .DOC

522.5 KB Created: 2021-11-10 10:26:00 Authoring application: Microsoft Office Word

MD5: d25f2a1315e8f0cad8927fbf7b36b5c9 SHA-1: 8aa4bd92e2382bcf7f931e5b664355309631569c SHA-256: ce3b1bca503c703866945dc81edf9aca6988eb4183672a26f08cfbad3287b123

282 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1546.001 Event Triggered Execution: Registry Run Keys / Startup Folder

The sample contains a VBA macro named Document_Open, which is automatically executed when the document is opened. This macro attempts to open another document named 'zoro.doc' using a hardcoded password 'donttouchme'. The script also contains logic to potentially rename files with a '.kl' extension to 'zoro.doc' in the user's template path. The presence of the Document_Open macro and the attempt to open a password-protected file strongly suggest a malicious intent, likely to deliver further stages of malware.

Heuristics 8

Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT

OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
ClamAV: Doc.Dropper.Valyria-10001413-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Valyria-10001413-0
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
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.microsoft.com/office/2006/encryption
- http://schemas.microsoft.com/office/2006/keyEncryptor/password
- http://schemas.microsoft.com/office/2006/keyEncryptor/certificate
- http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `5c25fd0f50970698f63f4d727f0b300c327ac001e6d5f83c19a6f4f6a12c2fb9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2886 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `c6792d7939470544cc1fb5dba69daf5e400c2ce4ee0fb518ca52a08f28ccae92`	ole-package	OLE Ole10Native stream: ObjectPool/_1698016406/Ole10Native	343843 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.89, consistent with packed or encrypted content.

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