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

Static analysis result for SHA-256 16c4e710ab1cb58b…

MALICIOUS

Office (OLE) / .EXE

56.5 KB Created: 1997-09-17 11:18:00 Authoring application: Microsoft Word 8.0
MD5: a1b80ece9093280ce24daa585bccedf3 SHA-1: be4d5691d9b284fac1fe3d69bc242d4aeed91d50 SHA-256: 16c4e710ab1cb58beb45b18bd353c5f8106004dce4a2f5c4627d1dab0ee9f128
360 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059 Command and Scripting Interpreter

The sample contains VBA macros, including AutoOpen and Auto_Close, which are designed to execute automatically. The critical heuristic 'OLE_VBA_SHELL' indicates the use of the Shell() function, likely to download and execute a secondary payload. The embedded artifact was detected by ClamAV as 'Win.Worm.VBS-213', suggesting a worm-like behavior.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Cobra-12 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Cobra-12
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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.
  • 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
fa79503204c6b3c48a1ee502561846c4ddac828c18a5e537ff24b7b8569de148		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4813 bytes
Detection
ClamAV: Win.Worm.VBS-213
Obfuscation or payload: unlikely

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