Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 69236fc1bb307a75…

MALICIOUS

Office (OLE) / .DOC

221.0 KB Created: 2016-03-28 16:27:00 Authoring application: Microsoft Office Word First seen: 2023-01-23
MD5: 2e6569bbbb0aa64f47e18f3e5aa25572 SHA-1: 221fd99a1e4cf278ac2a8285f0beeff24f0b26df SHA-256: 69236fc1bb307a756a04c853bd64aeaf91cdd65e0bd35ea622fd75b8c2d4aebe
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File

The sample is a malicious OLE document containing VBA macros. The critical 'OLE_VBA_SHELL' heuristic indicates the use of the Shell() function, and the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic points to an auto-executing macro ('Document_Open') that uses execution tokens. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's purpose is to prompt the user for a password to decrypt an archive, a common tactic for bypassing gateway security. The VBA script itself is heavily obfuscated, but the presence of Shell() and the lure indicate a downloader or dropper functionality.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.iec.ch
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4d6ca3d0e727816cb0fafec692fc82e615963c426dbbc07b4c32e1beb892d81b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 91166 bytes

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