Office (OLE) malware analysis — malicious · fcd7a0fb7397a72f

MALICIOUS

Office (OLE)

181.0 KB Created: 2018-01-08 17:41:50 Authoring application: Microsoft Excel First seen: 2018-01-23

MD5: 049a3f773fcb5c15147886818f519714 SHA-1: 3ffcb2a4cf4ce3822588d258badb99da8114ee65 SHA-256: fcd7a0fb7397a72f6814e94bb8efb51d065642a0587cc1a51f8380fc0d844d57

242 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information T1105 Ingress Tool Transfer

The sample is a malicious Microsoft Excel file identified as containing an embedded PE executable. Heuristics indicate the use of ShellExecute, LoadLibrary, and GetProcAddress APIs, suggesting the execution of the embedded payload. The embedded executable, named 'Virus1.exe' in the document body, is likely dropped and executed by the Office document.

Heuristics 6

Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Suspicious extracted artifact info 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_0000108f.exe`	embedded-pe	Office MZ+PE at offset 0x108F	181105 bytes
SHA-256: `d28923d8e5faa1613fce9efd7a54fb04a86926d81e29f19606724098cf47f14b`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.48, consistent with packed or encrypted content.
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: MBD000245C8/Ole10Native	175761 bytes
SHA-256: `154b8c3bc8bf871a500362b399c5200aa252d208ea9adaf91594c6ced998ef5a`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.50, consistent with packed or encrypted content.

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