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

Static analysis result for SHA-256 4404564408c87771…

MALICIOUS

Office (OLE) / .DOC

29.5 KB Created: 2020-06-07 22:43:00 Authoring application: Microsoft Office Word
MD5: ca2a3733aaec0bbd46616908fb1a1e37 SHA-1: 5c52cd2598dc8d95783bcf4fd69380b92e16838c SHA-256: 4404564408c877718f7219c733be41d36070976ed33b9c44edc306778c52e3b8
460 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The document contains a lure to enable content, which is a common tactic for macro-based malware. Critical heuristics indicate the presence of VBA macros that utilize WScript.Shell and the Shell() function, suggesting the execution of external commands. The AutoOpen macro and p-code execution further support this. The embedded URL 'https://storage.googleapis.com/auto_connect/chrome.exe' is likely used to download a second-stage payload. The ClamAV detection 'Doc.Dropper.Agent-6412232-1' confirms the malicious nature.

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.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://storage.googleapis.com/auto_connect/chrome.exe
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2a15f5cc8706d60e2cd777283f5924a94dcffac7d68d703c0d09a1feddc0e1b8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 851 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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