Office (OLE) malware analysis — malicious · 27bdd4112e9fa854

MALICIOUS

Office (OLE)

87.0 KB Created: 2001-06-26 14:52:00 Authoring application: Microsoft Word 8.0

MD5: 20b3e23c0e7a18024db82e0bad1838dd SHA-1: de59f906fe1b63590dc60cc3a2cd707b66f693ea SHA-256: 27bdd4112e9fa854bf4017be2f0a3ca8df629dc919c6e735a6f968bf7fd462d3

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is identified as malicious by ClamAV with multiple signatures indicating it is a Trojan. The presence of VBA macros, specifically detected by OLE_VBA_MACROS, OLE_VBA_CREATEOBJ, and OLE_VBA_GETOBJ heuristics, suggests that the document is designed to execute malicious code. The extracted document body, while in Czech and related to medical procedures, is likely a lure to encourage the user to enable macros. The embedded VBA macros are the primary mechanism for delivering the payload.

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.

Filename	Kind	Source	Size
`macros.bas` `28bddf8ef6f90abb80f9eefe64649ae18587fde0fa3bc3c18e805821819aaf91`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	9421 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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