Office (OLE) / .DOC malware analysis — malicious · 43874a9fbb28f47b

MALICIOUS

Office (OLE) / .DOC

54.5 KB Created: 2022-04-05 12:48:00 Authoring application: Microsoft Office Word First seen: 2022-04-05

MD5: 26b3f7fcf34d2e05701b2a412b8567be SHA-1: 6da0bf010d03ec5aa962a6c5a0dd59244c7ce6e9 SHA-256: 43874a9fbb28f47bc007e30c0c5494bb292e376398db3c446aa8567f8a4a49b1

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The AutoOpen VBA macro is configured to execute upon opening the document. It uses CreateObject to instantiate the Windows Installer service and then calls InstallProduct to download and execute the MSI package from the URL "https://graydonscrossing.com/VEE/2/BADDEST.msi". This indicates a macro-based downloader attack pattern.

Heuristics 7

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.
NOP-equivalent sled detected medium SC_NOP_EQUIV_SLED

Long run of 0x41 bytes
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://graydonscrossing.com/VEE/2/BADDEST.msi�
- https://graydonscrossing.com/VEE/2/BADDEST.msi
- https://docs.microsoft.com/en-us/windows/win32/msi/action
- http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `29edc496e6bab273a7a5ea93d8d3208f55bc72bc83102d2e5b012aebbc2f4bac`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	628 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `21a5ba8afcfa78313eb1cda9bbc9dc76c4cb8b2ce843a4962140084a58e72849`	ole-package	OLE Ole10Native stream: ObjectPool/_1710587586/Ole10Native	4516 bytes

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