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

Static analysis result for SHA-256 e5f85b53eb2b9f3a…

MALICIOUS

Office (OLE) / .DOCX

69.5 KB Created: 2022-04-19 14:45:00 Authoring application: Microsoft Office Word First seen: 2022-04-21
MD5: defaf3e58b2ff58ce20261cbdce06c77 SHA-1: 8f5e3d1731667f6de7cb8dce3dbf7d164d7d91c1 SHA-256: e5f85b53eb2b9f3a40d6403a202735178c018b5687f7721ffbc64e0890c6eb68
270 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1059.001 PowerShell T1204.002 Malicious File

The sample contains VBA macros that leverage WScript.Shell and Scripting.FileSystemObject to create a VBScript file named 'HelpCenterUpdater.vbs' within the user's Documents folder. This script is designed to download and execute a second-stage payload. The presence of Shell() and CreateObject() calls, along with WScript.Shell usage, strongly indicates malicious intent.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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 macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b9b76e41226218c4b85623e0145824266588c130a87b58b35b96c93e63ed3ac4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 32593 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 62 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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