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

Static analysis result for SHA-256 a9bf119619e2f467…

MALICIOUS

Office (OOXML) / .DOC

16.5 KB Created: 2021-03-21 18:08:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: 416a8fa11d55a943aeb9516dfea4a66c SHA-1: c9d2f38511acdb9737ffecd982b6891da774103d SHA-256: a9bf119619e2f4679faef45b00a071a7bfb1b194899011770bc22e6b313c3378
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The OOXML document contains VBA macros, specifically an AutoOpen macro, which is a common technique for executing malicious code upon document opening. The CreateObject heuristic further suggests the macro is designed to interact with the system, likely to download and execute a second-stage payload. The presence of VBA Chr string obfuscation indicates an attempt to evade detection.

Heuristics 5

  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
8c5ba5f7a1ce1f9de95d03dfc0c574d4cb1d0d0d86364be1d6f9f08c05bac010		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1968 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 15 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
fe08a0dc46d80d9ef7dd951bb288ef53979d52578d859947851496f26c65d112		 vba-project OOXML VBA project: word/vbaProject.bin 12288 bytes
Detection
ClamAV: No threats found
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.