Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4619c08f6c7fb231…

MALICIOUS

Office (OLE)

31.0 KB Created: 1999-11-13 08:16:49 Authoring application: Microsoft Excel
MD5: 3d29c824e6fdba6a1cd5854ece67996e SHA-1: df2cecf10d0ad29d9aea5d967ab2bce6e3ccb506 SHA-256: 4619c08f6c7fb2319a94784df6a13c7edc2c46496eda9ff9235d17817419ec27
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File

The sample is an Office document containing VBA macros, indicated by the OLE_VBA_MACROS heuristic. The presence of CreateObject and GetObject calls suggests dynamic execution of code. ClamAV detections for Win.Trojan.Tristate-2 and Doc.Trojan.Tristate-1 confirm its malicious nature. The document body, presented as a budget classification, is a common lure to trick users into enabling macros, which then likely execute a second-stage payload. No specific URLs or network indicators were extracted, but the embedded macros are the primary attack vector.

Heuristics 6

  • ClamAV: Win.Trojan.Tristate-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Tristate-2
  • 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.
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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
adca8984bc4d9a54eab2dbb9d3cfdefcb3a27175d973fa41102bc02f56386542		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9805 bytes
Detection
ClamAV: Doc.Trojan.Tristate-1
Obfuscation or payload: likely
Carved artifact contains 12 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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