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

Static analysis result for SHA-256 fa115fb6499783ca…

MALICIOUS

Office (OLE) / .DOC

108.0 KB Created: 2020-08-15 12:27:00 Authoring application: Microsoft Office Word
MD5: 1479b531f30b50ed4c2509d4a49664bd SHA-1: 8316230b4dcee8934b06e9a85a66686a82831cd4 SHA-256: fa115fb6499783cabc60f6b0b893a5b622ba45e6f85fa02de5e6af1a547dbb4b
540 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

This document contains VBA macros that utilize WScript.Shell to execute a PowerShell command. The PowerShell command is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The embedded URL, https://cesko.ge/themes/images/fb_logo_geo.png, is likely used as a lure or to host the initial payload.

Heuristics 13

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • ClamAV: Doc.Downloader.Pwshell-10001336-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Pwshell-10001336-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • 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
  • 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
  • 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 https://cesko.ge/themes/images/fb_logo_geo.png
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
23d464234cd7276b77e141a3287b3497b45ef48af5853c5766708b598904204a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 11347 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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