Office (OOXML) / .DOC malware analysis — malicious · a69ededa1ee5701d

MALICIOUS

Office (OOXML) / .DOC

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

MD5: 563e8cb603a07e1e9f4c90d7501db5c4 SHA-1: be11a54c1d16ea0e346da95931dc9eb7c35236f6 SHA-256: a69ededa1ee5701da4bec5b90ccd962ffa650b6423e471d09311426f20da43fd

382 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains VBA macros, including a Document_Open macro, which is a common technique for initial execution. The script uses WScript.Shell to execute a command that constructs a URL for downloading a second-stage payload. The reconstructed URL is "http://visteme.m[.]x/shop/wp-admin/PP/". This indicates the document's purpose is to act as a downloader for further malicious activity.

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
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — 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
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `2f8e98298971489e6d7cf7180a53f3e943b0aaf1f40385054cb8b91f3db8a9ab`	vba-project	OOXML VBA project: word/vbaProject.bin	16896 bytes
Detection ClamAV: Doc.Malware.Valyria-10033907-0 Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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