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

Static analysis result for SHA-256 ed43aff34f2bd2cf…

MALICIOUS

Office (OOXML) / .DOC

76.3 KB Created: 2021-04-30 08:03:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 6cc422b710c1543cc8fec2159d8a2c44 SHA-1: b13bc1c4e99317659a4ea5e20e857d25021e240c SHA-256: ed43aff34f2bd2cf9939c238104478667dfb2ccf9b4a9b4ab7ff87f2993e7aeb
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The document contains VBA macros, specifically an AutoOpen macro, which is designed to execute automatically. The macros utilize WScript.Shell and CreateObject to call the Shell() function, indicating an intent to download and execute a second-stage payload from the suspicious URL found within the document. This is a common delivery mechanism for malware.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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://popularretail2015a.com/dgsos/95P28kK8737IRCoQxRx9T71I7fP7YAotEYImRLgS/ZDjonGtrnF3ftEhFCeR3jv1fu3tzE0rTJVDydU/5y6KNXjtiHCU6UgT88X/90323/olAP5WuYJFO1DZDdERyg7LGoUFAjk2mffQDU0ysxq8rO/HZc/law10?IiPoi3pxh=Cs&sid=Rh1&vssuvZ7E7A=aHImg4kBE
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • 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/2015/wordml/symex
    • 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
ea654247adb59828676e88c737db478db78f7b327a7ac8bc8de1f59238cf86cc		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1688 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
d15823153f095e70fea023223af0dc5d2603f2f0e15773d6db2b7e5065417c38		 vba-project OOXML VBA project: word/vbaProject.bin 23040 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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