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

Static analysis result for SHA-256 9bd4f83442f08fe6…

MALICIOUS

Office (OLE) / .DOC

81.5 KB Created: 2020-03-20 06:17:00 Authoring application: Microsoft Office Word
MD5: 1a7232ef1386f78e76052827d8f703ae SHA-1: 3c271c09495e8f82b3c299953e7ab65b4efb11af SHA-256: 9bd4f83442f08fe627d4d7d26d5cf574a83695bb050ee625fd769f31793df616
288 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro that utilizes the Shell() function to execute cmd.exe. This indicates an attempt to download and run a second-stage payload. The embedded URL http://phpview.mygamesonline.org is suspicious and likely serves as the distribution point for the payload. The document body discusses the Covid-19 pandemic and North Korean cyber-crime, suggesting a lure to entice users to open the malicious document.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://phpview.mygamesonline.org
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
55e7f00b8fdeef0ced4820ab0ca2b8fb1df2dc9c23ea4811114ad561e483d006		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 61540 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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