Valyria Office (OLE) / .DOC malware analysis — malicious · a2903ebc67c3549f

MALICIOUS

Office (OLE) / .DOC

893.0 KB Created: 2021-11-23 11:34:00 Authoring application: Microsoft Office Word

MD5: ca52b8e88308d2d3147b0721d6d72626 SHA-1: e91c2de24abae6a37f6572b70685a3ce25fe821e SHA-256: a2903ebc67c3549f59ecf6718444f6826030fa29f3701460b9709edbd9aa675b

282 Risk Score

Malware Insights

Valyria · confidence 85%

MITRE ATT&CK

T1566.001 Phishing: Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.005 Command and Scripting Interpreter: Visual Basic for Applications T1027 Obfuscated Files or Information T1105 Ingress Tool Transfer

The sample contains a VBA macro that attempts to open a secondary document named 'zoro.doc' from the user templates path. The script uses string concatenation to obfuscate the 'Scripting.FileSystemObject' call. The ClamAV detection 'Doc.Dropper.Valyria' directly supports the attribution to the Valyria family. The macro's behavior of dropping a template-based payload is a known pattern for the same family.

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-10001412-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Valyria-10001412-0
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` `8035462e7e46acedefab3706a2f361f75b7d71e90dfe26fe820f3eca23ff837e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2929 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` `9a4cdaa0e0fa0ce7d71e57202091b0409b97ded559645c7b17bda18b27700880`	ole-package	OLE Ole10Native stream: ObjectPool/_1699143942/Ole10Native	292131 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.93, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.