Office (OLE) / .DOC malware analysis — malicious · e40a78e5456b2590

MALICIOUS

Office (OLE) / .DOC

166.5 KB First seen: 2022-05-31

MD5: 369b4b9ddcb6b7801fba4923f459e689 SHA-1: 33d74ce0590d71b4d950ea56e5236c4bfce34b8d SHA-256: e40a78e5456b25907fcc009c607b2e816a03f326ecce3480cae9d8230720432f

140 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains a VBA macro within the Document_Open subroutine, which is designed to execute automatically. This macro writes a batch file to disk at 'C:\Users\Public\Videos\www.google.com.bat'. The script then proceeds to construct and write a URL to this batch file, likely to download and execute a second-stage payload. The use of Document_Open and VBA execution points to a macro-based delivery mechanism.

Heuristics 4

Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `73ff31f32dfd4e4fc3c41d05fd041e653740fe16a246e602779bbc052a261ad9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1852 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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