Office (OLE) / .DOC malware analysis — malicious · ad202f1b096cd628

MALICIOUS

Office (OLE) / .DOC

45.0 KB Created: 2022-04-12 12:00:00 Authoring application: Microsoft Office Word First seen: 2022-04-13

MD5: 74564f586088acabc48231123485d5bd SHA-1: e413d710459897b9320a38288a7e88e46b536f0a SHA-256: ad202f1b096cd6285e7d1c2891165737589889b74607159df0507a9f6b9eafef

182 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a VBA macro with an AutoOpen subroutine that is triggered upon opening the document. This macro utilizes the 'CreateObject' function to instantiate the 'WindowsInstaller.Installer' COM object. It then proceeds to call the 'InstallProduct' method, passing a URL that points to a Windows Installer package (MSI). This indicates the document's primary purpose is to download and execute a second-stage payload from the specified URL, likely leading to further system compromise.

Heuristics 6

AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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://filebin.net/7bhac6pxm9hgd9pv/MAM1.msi
- http://schemas.openxmlformats.org/drawingml/2006/main
- https://docs.microsoft.com/en-us/windows/win32/msi/action

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `fe27bff8f98370a2bbf092ba2e637f4a1bdbc90b3e136fff53f37f1f2b874114`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	627 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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