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

Static analysis result for SHA-256 22c7c7460b79fd75…

MALICIOUS

Office (OLE) / .DOC

581.8 KB Created: 2020-09-11 09:15:00 Authoring application: Microsoft Office Word
MD5: 87a9b657be472c3e6f4593c8c1bd2fde SHA-1: ed0724584bada16d46a396b50a5c2f3747ef3101 SHA-256: 22c7c7460b79fd75c96dc7d90d8edcf13fdead3619d16f4b63dca58f1fee69f9
440 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell

The sample is a malicious OLE document containing VBA macros. The 'Document_Open' macro is present and uses the 'Shell()' function, indicating an attempt to execute arbitrary code. The presence of 'SC_STR_LOADLIBRARY' and 'SC_STR_WSCRIPT' heuristics further suggests the execution of external scripts or libraries. The 'SE_ENABLE_LURE' heuristic confirms that the document likely prompts the user to enable macros. The ClamAV detection as 'Xls.Packed.Logan-9752153-0' also confirms its malicious nature. No specific family could be identified, but the overall behavior points to a macro-based downloader.

Heuristics 12

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Xls.Packed.Logan-9752153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Packed.Logan-9752153-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 595,745 bytes but its declared streams total only 172,493 bytes — 423,252 bytes (71%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ef9dd973848df720c93e9713a21a4a653e292dcc0bd474455a980fa7c31a70a9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 67090 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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