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

Static analysis result for SHA-256 70b7329553824ba9…

MALICIOUS

Office (OLE) / .DOC

90.0 KB Created: 2022-03-07 07:51:00 Authoring application: Microsoft Office Word First seen: 2022-03-08
MD5: 0b83e43c9e1ac4c245f9a9aac45e08d8 SHA-1: 2ea188d4a0973157dadcbbec59d77ef2299db31f SHA-256: 70b7329553824ba9b15c2aa19172782ed7a731dba67dc34597e1a25775ddea26
404 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains a Document_Open VBA macro that utilizes WScript.Shell to access the user's Templates directory. This macro is designed to download and execute a second-stage payload, indicated by the critical heuristic 'OLE_VBA_HTTP_DROP_EXEC'. The presence of WScript.Shell and the download functionality strongly suggests a downloader or droppper malware.

Heuristics 11

  • 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.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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
  • Suspicious extracted artifact info 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.
  • 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.

FilenameKindSourceSize
macros.bas
9e0864f91330f99ebf23c8c4f7350421cf9e3b1b2563558662c16286fe526bd5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 32243 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 117 long base64-like blob(s).

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