Office (OLE) malware analysis — malicious · cca0f8b65f959487

MALICIOUS

Office (OLE)

23.5 KB Created: 2017-10-30 13:44:00 Authoring application: Microsoft Office Word First seen: 2017-11-13

MD5: 838fec3d07d0e3f5a15a0ee42349a002 SHA-1: 9cd09553a44437ff799323648815f727127202f9 SHA-256: cca0f8b65f95948759b3ba77f1e7d2c68dac61995c6294bb9224c392b8e49ecc

122 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The document contains a DDE AUTO command that executes certutil.exe to download a PowerShell script from http://nefarious.host/pp.ps1. The downloaded script is then executed using powershell.exe. This indicates a likely multi-stage attack where the initial document serves as a dropper for a malicious PowerShell payload. The use of certutil.exe and PowerShell strongly suggests a downloader or initial execution stage.

Heuristics 4

Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
Reference to certutil (download/decode) high SC_STR_CERTUTIL

Reference to certutil (download/decode)
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://nefarious.host/pp.ps1 In document text (OLE body)
- http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OLE body)

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