Sagent — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 4dc707571955edf1…

MALICIOUS

Office (OLE) / .DOC

242.4 KB Created: 2020-05-10 16:14:00 Authoring application: Microsoft Office Word
MD5: 56a7d493f9d2263cab57b392a7997869 SHA-1: 3512bd52429bd75dd7a29a55f8a10f0d0712208f SHA-256: 4dc707571955edf182d6d358fbaf81bdcdea59c790d09eb9a2567ccf53a3245c
240 Risk Score

Malware Insights

Sagent · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1218.011 Signed Binary Proxy Execution: Rundll32

The sample is a malicious OLE document containing VBA macros. The macros utilize a heap spray and reference certutil for downloading and decoding, indicating a dropper functionality. The ClamAV detection name 'Doc.Dropper.Sagent-9765455-0' strongly suggests the Sagent family. The VBA macros are designed to download and execute a second-stage payload, likely using certutil.

Heuristics 7

  • ClamAV: Doc.Dropper.Sagent-9765455-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Sagent-9765455-0
  • Heap-spray pattern detected high SC_HEAP_SPRAY
    Repeated 0x41 (A) bytes found
  • Reference to certutil (download/decode) high SC_STR_CERTUTIL
    Reference to certutil (download/decode)
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.microsoft.com0
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://crl.microsoft.com/pki/crl/products/MicCodSigPCA_2010-07-06.crl0Z
    • http://www.microsoft.com/pki/certs/MicCodSigPCA_2010-07-06.crt0
    • http://crl.microsoft.com/pki/crl/products/MicRooCerAut_2010-06-23.crl0Z
    • http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt0��
    • http://www.microsoft.com/PKI/docs/CPS/default.htm0@
    • http://crl.microsoft.com/pki/crl/products/MicTimStaPCA_2010-07-01.crl0Z
    • http://www.microsoft.com/pki/certs/MicTimStaPCA_2010-07-01.crt0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
bcbe2440a3e3e1f44a2c66d85417677231b2c54dcd7e3307bf4e396757159f4c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1511 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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