Office (OLE) / .DOC malware analysis — malicious · 915ea807cdf10ea4

MALICIOUS

Office (OLE) / .DOC

575.5 KB Created: 2021-11-03 09:08:00 Authoring application: Microsoft Office Word

MD5: ee6533a8f2332056197ad12ca7c945dc SHA-1: 569ea04796550cf0f8811e2a5aad4b9d1552aefe SHA-256: 915ea807cdf10ea4a4912377d7c688a527d0e91c7777d811b171d2960b75c65c

282 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious Word document containing VBA macros. The Document_Open macro triggers the execution of other VBA functions, including one that attempts to open a file named 'zoro.doc' from the user's template path. This file is likely a malicious payload. The VBA code also attempts to rename files with the extension '.kl' to 'zoro.doc', suggesting a file-dropping or template-hijacking mechanism. The presence of CreateObject calls and the auto-execution of Document_Open are strong indicators of malicious intent, likely to download and execute a second-stage payload.

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` `0e4a9583f8b4ecec4080dd466152a07f55057af2a0cccdec725579f3d1d20f17`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2609 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` `cb49528acdad2b047cec50a87b2a6ef9b0e349856ba3b1fcc0323db740537bcb`	ole-package	OLE Ole10Native stream: ObjectPool/_1697410516/Ole10Native	412451 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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