Malicious Office (OOXML) / .DOCX — malware analysis report

Static analysis result for SHA-256 53dd0771eb5d402f…

MALICIOUS

Office (OOXML) / .DOCX

14.6 KB Created: 2014-08-05 20:21:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 021eaa038531936a0ee613e9d9644cee SHA-1: c0c5fd8496c77e5a9e48d5221e3cc8972a8275af SHA-256: 53dd0771eb5d402f84e08a106f3d969147d102c213110081174de991d5102014
408 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The OOXML document contains VBA macros, indicated by multiple heuristic firings including OLE_VBA_AUTOOPEN, OLE_VBA_WBOPEN, and OLE_VBA_AUTO. Critical heuristics indicate the presence of a Shell() call and CreateObject, suggesting the macros are designed to execute arbitrary commands. ClamAV detections further confirm the malicious nature of the embedded macros. The primary attack pattern involves leveraging these macros to download and execute a secondary payload.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Macro.GenericHeuristic-5931846-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.GenericHeuristic-5931846-4
  • 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.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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.

FilenameKindSourceSize
macros.bas
25b653f138d3a8cc4e6cb5b3574d4048fc34f83ec5d720cba164f0a98b026fec		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1373 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
d0f81ac15196595b619594b0c282a0cc7e655dd40c7c3e428df6be45345da04e		 vba-project OOXML VBA project: word/vbaProject.bin 9728 bytes
Detection
ClamAV: Doc.Macro.GenericHeuristic-5931846-4
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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