Office (OLE) malware analysis — malicious · 366f7f00d01862a8

MALICIOUS

Office (OLE)

74.8 KB Created: 2018-11-08 15:35:00 Authoring application: Microsoft Office Word First seen: 2019-08-04

MD5: 9b943735152bd3d4007223b5acbdda6c SHA-1: 0e0d0f6a5557c443010e7a60aabbcdcc951c06be SHA-256: 366f7f00d01862a8bdad87f17924ede10650255c9b7cd5f52dc3ec098d92bc2f

122 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell

The sample contains a heavily obfuscated PowerShell command embedded within the document body. This command is designed to decompress and execute a Base64 encoded payload, likely a second-stage downloader. The use of cmd.exe to invoke PowerShell and the complex string manipulation indicate a malicious intent to evade detection and download further malicious content.

Heuristics 4

Suspicious cmd.exe invocation with execution flag high SC_STR_CMD

Suspicious cmd.exe invocation with execution flag
Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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 In document text (OLE body)

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