Office (OLE) / .EXE malware analysis — malicious · 158f5f2c4cab2186

MALICIOUS

Office (OLE) / .EXE

105.5 KB Created: 2010-07-02 13:23:00 Authoring application: Microsoft Office Word

MD5: 89bdc357666428fd28e4791d7050aa95 SHA-1: c4fff2db4377b3a294b3e345690f148ecc42c4db SHA-256: 158f5f2c4cab2186c0a9e1456b1e0e9b2e685fec59987e34d12af365d9e23cf4

202 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is an OLE document containing an embedded PE executable. Heuristics indicate the use of VirtualAlloc, LoadLibrary, and GetProcAddress APIs, suggesting the embedded executable is likely a loader or dropper. The presence of an embedded executable within an Office document strongly suggests a spearphishing attachment attack vector, aiming to trick the user into executing the payload.

Heuristics 6

OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514

Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc 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_00003265.exe` `1e5287d8ba427cfecaf93297493058d2cf5a26acdfbdc2a3d20a1f6f546bdd6c`	embedded-pe	Office MZ+PE at offset 0x3265	95131 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.61, consistent with packed or encrypted content.
`ole10native_00.bin` `5df4d757a23a90b4f0c710dde596ad8bf5727b6544dd28ef21211c4506b7b03a`	ole-package	OLE Ole10Native stream: ObjectPool/_1339564384/Ole10Native	91239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.75, consistent with packed or encrypted content.

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