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

Static analysis result for SHA-256 2541e67f139d51eb…

MALICIOUS

Office (OLE) / .DOC

331.0 KB Created: 2010-08-06 23:42:00 Authoring application: Microsoft Word 10.0
MD5: 6d9482cd4d22984a917fdcf95f1f2997 SHA-1: 6fb6e8d0b702a29a494696a5058481f7fc738bfc SHA-256: 2541e67f139d51eb529c788974119a4dd3a95f8d4da40154c33748f334cdce6d
460 Risk Score

Malware Insights

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

The sample contains critical heuristics for VBA macros, including Shell() calls and WScript.Shell usage, indicating a malicious intent to execute external code. The AutoOpen macro is present, suggesting automatic execution upon opening the document. The extracted artifacts and heuristics point to the creation of a batch file 'dbpay.bat' and a registry key for persistence at 'HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Lovestar'. The ClamAV detection as 'Win.Worm.Godog-4' further supports the malicious classification.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Win.Worm.Godog-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Worm.Godog-4
  • 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.
  • 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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
041294f233ee228b8a85ceabc4faf99736f6cd58fb1251be2af65ca37ddc4e2b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 198982 bytes
Detection
ClamAV: Win.Worm.Godog-4
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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