Malicious Office (OOXML) / .PPTX — malware analysis report

Static analysis result for SHA-256 061e17f3b2fd4a4d…

MALICIOUS

Office (OOXML) / .PPTX

12.3 KB
MD5: dae0efd29230feab95f46ee20030a425 SHA-1: 75c799dc33263eb6c83db7710b3a2a263adf80f0 SHA-256: 061e17f3b2fd4a4dce1bf4f8a31198273f1abc47c32456d06fd5997ea4363578
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1071.001 Web Protocols

The sample contains an Auto_Open VBA macro that first displays a fake error message to the user. It then decodes and executes a Base64 encoded string which appears to be a PowerShell command to download a file from 'http://evil.tld/download.exe'. This indicates the macro is designed to download and execute a second-stage payload.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_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.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Suspicious extracted artifact info 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b8f18f94313165406afd01f3209efc50b62d8524659ab6328b085758f91acbe2		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2394 bytes
vbaProject_00.bin
187457c7d3c02437c732d3836d550b3b4cd1cd25470f6341d9bb6f44c15caf6b		 vba-project OOXML VBA project: ppt/vbaProject.bin 32256 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).

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