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

Static analysis result for SHA-256 9c906c2f3bfb2488…

MALICIOUS

Office (OLE) / .DOC

521.0 KB Created: 2020-08-18 17:15:00 Authoring application: Microsoft Office Word
MD5: 8ed89d14dee005ea59634aade15dba97 SHA-1: ea93acf0c278dd59e29ae1402d35db8e0f3ae966 SHA-256: 9c906c2f3bfb24883a8784a92515e6337e1767314816d5d9738f9ec182beaf44
448 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.003 Windows Command Shell T1204.002 Malicious File T1087.001 Local Accounts T1059.001 PowerShell

The sample contains VBA macros, including an AutoOpen macro, that utilize WScript.Shell and cmd.exe to execute commands. The document body, despite being heavily obfuscated, suggests a lure related to payment or invoices. The primary intent appears to be the execution of a second-stage payload via the embedded VBA macro, which likely leverages the WScript.Shell object to interact with the operating system.

Heuristics 12

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Doc.Malware.Sagent-10035017-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-10035017-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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.I
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://schemas.openxmlformats.org/officeDM
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
30641c289b11dc1e523ca82bd6c0fdcdce8e2977c7f58a3f6109be361bef136b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4322 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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