Office (OLE) / .DOC malware analysis — malicious · 6d39af51574dd2a9

MALICIOUS

Office (OLE) / .DOC

35.5 KB Created: 2018-05-15 15:35:00 Authoring application: Microsoft Office Word

MD5: 7880a00abc10f77aa62d495939321302 SHA-1: 0879953239f2f85ba0ec439d52a99f52bff29f66 SHA-256: 6d39af51574dd2a9d3603d1efe692400070fb06afce3870d06bb4005d940153e

342 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The file contains VBA macros that utilize Shell() and CreateObject() functions, indicative of malicious intent. Specifically, the macros are designed to download and save a file to disk using HTTP, which is a common technique for delivering second-stage payloads. The ClamAV detection further supports its malicious classification.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
ClamAV: Doc.Downloader.00536d-6923444-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.00536d-6923444-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `8c7dce294e98eea6f32b108b60657aa238b973e7ca538060da2c96be1ae99487`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4864 bytes

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