Office (OLE) / .DOC malware analysis — malicious · bddcb2e75e414b3a

MALICIOUS

Office (OLE) / .DOC

2.39 MB Authoring application: Microsoft Office Word

MD5: ad4a6a0ddeacdf0fc74c3b45b57a1316 SHA-1: 282c431963a312d65a73ba2147c7980eb493f1ca SHA-256: bddcb2e75e414b3a489d53f8cda1a21b043af7e7758998b17659c1938594d2ca

422 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open macro that calls the Shell() function, indicating it's designed to execute arbitrary commands. The presence of 'SC_STR_SHELLEXEC' and 'SC_STR_WSCRIPT' heuristics further supports this. The macro likely downloads and executes a second-stage payload, as suggested by the 'SE_ENABLE_LURE' heuristic which indicates the document prompts the user to enable macros. No specific family could be identified, hence 'unknown family'.

Heuristics 12

Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT

OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject 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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/photoshop/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
- http://ns.adobe.com/xap/1.0/sType/ResourceRef#
- http://ns.adobe.com/tiff/1.0/
- http://ns.adobe.com/exif/1.0/
- http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6ea851c73ff1cf302a10ddf198b2a1d36e580a9d3c576b19f1c57338cde7a0ec`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	56424 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `bcb6b6d45d1c47668ca7e747390fd15d81815fb40ffb9dd01fc108a6ec17bbc4`	ole-package	OLE Ole10Native stream: ObjectPool/_1687200232/Ole10Native	144119 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 shell/COM execution token(s).

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