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

Static analysis result for SHA-256 45c093be9caf5ff4…

MALICIOUS

Office (OLE) / .DOC

51.5 KB Created: 2020-04-15 15:13:00 Authoring application: Microsoft Office Word
MD5: cb6d0c6478b164b4eaa7477728a8ded3 SHA-1: 51baadb2f0df8852fb4d1a66ddccb84fd066b1b7 SHA-256: 45c093be9caf5ff400cd57c20ed2a73f137d2e9561b0db752e83c69a2fb2b14b
380 Risk Score

Malware Insights

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

The sample is a malicious Word document containing VBA macros. The AutoOpen macro utilizes WScript.Shell and CreateObject to execute a command, likely to download and run a second-stage payload from the URL http://45.147.231.107/ldr.exe. The document body itself is a plausible lure, presenting information about COVID-19 needs assessment in the Americas.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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 http://45.147.231.107/ldr.exe
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9b5e947c01162b06838634b2e79dc9b7b4139a51539275dc2fdd7a6d774f15d7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2591 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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