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

Static analysis result for SHA-256 3501e7f285a9b7ec…

MALICIOUS

Office (OLE) / .DOC

42.5 KB Created: 2021-06-08 00:52:00 Authoring application: Microsoft Office Word
MD5: 97151acf80c77c6e422a4b2b535a430f SHA-1: 701007d8e16ba0e2de58017a6bf1e30344f2192d SHA-256: 3501e7f285a9b7ecb7654196b32cc2c49a523b1aa066f0f1b4c85371aa6384ae
400 Risk Score

Malware Insights

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

The sample contains a Document_Open VBA macro that utilizes WScript.Shell to execute obfuscated commands. These commands are designed to download and run a second-stage executable from a provided URL. The presence of Shell() and CreateObject calls, along with the auto-execution of the macro, strongly indicates a malicious downloader.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
    URL https://cdn.discordapp.com/attachments/851492209169661971/851623938022309928/slip.ex
    • http://schemas.openxmlformats.org/drawingml/2006/main
  • 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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9cea9ffa15d7b86a3d3b6c3ba9aee69b7bf4456730032750d97806f7b082a70a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 824 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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