Office (OLE) / .DOC malware analysis — malicious · 07567e81f93c822e

MALICIOUS

Office (OLE) / .DOC

857.5 KB Created: 2021-10-05 13:49:00 Authoring application: Microsoft Office Word

MD5: 9a9744c2e161c703d087f4260b6d33ea SHA-1: 6bbec3f33c94f186ac02207db06b7e0a0a9c77e0 SHA-256: 07567e81f93c822e13130d0ddaa080da0bf7388352a544f749b1d80d770b17c3

104 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing a VBA macro that executes upon opening. This macro searches for a file named 'zoro.kl' and, if found, attempts to execute it using a hardcoded password 'doyouknowthatthegodsofde' for a document opened via `Documents.Open`. The macro also appears to attempt persistence by writing to a registry key, though the full path is truncated in the provided evidence. The presence of a Document_Open macro and the search for an executable file strongly indicate a downloader or dropper functionality.

Heuristics 5

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.
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact info 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.
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` `4b4d165f838373d82956ea57a25034d84ac153ba8b2074181d6c5a1be9fa8daf`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3750 bytes
`ole10native_00.bin` `2d00befb3e7c6aa3ff7ad34b4eeef23517e793cfd7f765501619ad77505abeae`	ole-package	OLE Ole10Native stream: ObjectPool/_1694918961/Ole10Native	238886 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.97, consistent with packed or encrypted content.

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