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

Static analysis result for SHA-256 c10aa336a5e674a3…

MALICIOUS

Office (OLE) / .DOC

136.5 KB Created: 2020-04-19 04:19:00 Authoring application: Microsoft Office Word
MD5: 20b8d470cf139fd49e10d19c6d6237cc SHA-1: 6c48b8650db003fec1072b192408b410eb89b09e SHA-256: c10aa336a5e674a3f81339f7aa2436083391c3897a77a4cc6f1d2746f2ba5a3e
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is a malicious OLE document containing a VBA macro that executes upon opening. The macro utilizes CreateObject to interact with the file system and ADODB.STREAM, indicating it's designed to download and execute a second-stage payload. The specific URL 'https://www.upload.ee/files/13693454/hfhfjkjrkr.exe_Signed.exe' was extracted, which likely hosts the payload. The ClamAV detection 'Doc.Dropper.Agent-6412232-1' further supports its role as a dropper.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • 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
  • 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
    • https://www.upload.ee/files/13693454/hfhfjkjrkr.exe_Signed.exe�
    • https://www.upload.ee/files/13693454/hfhfjkjrkr.exe_Signed.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2eda51c5e47845902fc0e083dc412b59cf7d865f0b32c8e65d341b297909e9be		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5919 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 27 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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