Office (OOXML) / .DOC malware analysis — malicious · 7c5690577a49105d

MALICIOUS

Office (OOXML) / .DOC

140.0 KB Created: 2021-11-15 15:39:00 UTC Authoring application: Microsoft Office Word 12.0000

MD5: 472de7b8ac46fa14438cbcc23ad32a68 SHA-1: 4a3d10bfa418811b9a4f3732996954fa37924422 SHA-256: 7c5690577a49105db766faa999354e0e4128e902dd4b5337741e00e1305ced24

382 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious Office document containing VBA macros. The Document_Open macro is present and utilizes WScript.Shell to execute commands. Specifically, it constructs a URL, "http://visteme.mxc/shop/wp-admin/PP/", which is likely used to download and execute a second-stage payload. The presence of the Shell() call and WScript.Shell usage strongly indicates a downloader or droppper functionality.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
ClamAV: Doc.Malware.Valyria-10033907-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10033907-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
VBA project inside OOXML medium OOXML_VBA

Document contains a VBA project — VBA macros present
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/markup-compatibility/2006
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/officeDocument/2006/math
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
- http://schemas.openxmlformats.org/wordprocessingml/2006/main
- http://schemas.microsoft.com/office/word/2006/wordml

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `d5a25b7bf0ccedb249c27ef36e62fa12ba8e2ff73f7114a3a1f9f528858c345b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	3999 bytes
`vbaProject_00.bin` `76af16e2fcd0a70b191eaa9070fb67409e21a4fd9a2c347d3750c0a74ab6b413`	vba-project	OOXML VBA project: word/vbaProject.bin	16896 bytes
Detection ClamAV: Doc.Malware.Valyria-10033907-0 Obfuscation or payload: unlikely

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