Office (OLE) / .DOCX malware analysis — malicious · 786f5cf445a55c83

MALICIOUS

Office (OLE) / .DOCX

38.5 KB Created: 2021-07-06 04:33:00 Authoring application: Microsoft Office Word

MD5: 4f13f4f5acbc860707fb4bc0a29e64dd SHA-1: ad17b37b7d7b8017a8460c8b0c6e3677fb1784b4 SHA-256: 786f5cf445a55c8335e46f40d6868b78b36744bf16107351e8a298fbc14c0d59

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell

The sample is a malicious Office document containing VBA macros. The macros utilize CreateObject and CallByName functions, indicative of malicious intent. Specifically, the script attempts to reconstruct the string "MSXML2.ServerXMLHTTP" to create an object for making HTTP requests. It then sends data to the URL "https://fusuri-solt-down.com/ecm/ibm/1629207632/feedback", suggesting it's a downloader for a second-stage payload. The ClamAV detection also confirms its malicious nature as a downloader.

Heuristics 6

ClamAV: Doc.Downloader.Valyria-10033997-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Valyria-10033997-0
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
CallByName call high OLE_VBA_CALLBYNAME

CallByName 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 https://fusuri-solt-down.com/ecm/ibm/1629207632/feedback
- http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `eece5c8b7fd4440887598978d4db76dc0d38fbf0fd4fbe6e5bbb2f3e165d4818`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3134 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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