Win.Trojan.Alcaul-20 — Office (OLE) malware analysis

Static analysis result for SHA-256 7e0290b322f998f4…

MALICIOUS

Office (OLE)

36.5 KB Created: 2009-01-14 07:59:00 Authoring application: Microsoft Office Word
MD5: 464acd27ce755d6a0abd3390cad5269b SHA-1: 6849e5924b1ac9e841eced854ec7cd702b2ef54d SHA-256: 7e0290b322f998f4cb1ae205e1d3e018868d0cf45f492470bf37b9986a64c1ef
320 Risk Score

Malware Insights

Win.Trojan.Alcaul-20 · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Win.Trojan.Alcaul-20. Static analysis detected VBA macros, specifically a Document_Open macro that utilizes Shell() and CreateObject() calls. These functions are commonly used to download and execute additional malicious content. The presence of the 'macros.bas' artifact further supports the macro-based execution vector.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Win.Trojan.Alcaul-20 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Alcaul-20
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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
271ac0c2fa7dcb90d25975c5c15dd20724a40f5a7faf8a6936975a41853f1b2a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4667 bytes
Detection
ClamAV: Legacy.Trojan.Agent-33
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.