Malicious Office (OLE) / .RB0 — malware analysis report

Static analysis result for SHA-256 e403822eb162db12…

MALICIOUS

Office (OLE) / .RB0

181.0 KB Created: 2010-03-08 06:00:00 Authoring application: Microsoft Office Word
MD5: 9885e45e5a7d0947785c02c086e29dc8 SHA-1: 5b8d9458c314bab216540ea2a2595867b1546031 SHA-256: e403822eb162db120ae96dcbb47191df904ada8e970045133baeac5456803657
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

The sample contains VBA macros that trigger on document open, utilizing GetObject and executing a shell command. This indicates the macro is designed to download and execute a secondary payload. The presence of VBA macros and the execution of shell commands are strong indicators of malicious intent, likely for further system compromise.

Heuristics 3

  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • 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
fdc044316d17177e106280f2c7a19ef3deebe506b361916fe23f9080ee37c310		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3289 bytes

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