Office (OLE) / .DOC malware analysis — malicious · 6ebe01130c4a63aa

MALICIOUS

Office (OLE) / .DOC

111.5 KB Created: 2002-08-20 13:47:00 Authoring application: Microsoft Office Word

MD5: c8de794da4700d5dde11db2a5b2ff2eb SHA-1: 4a89c17a5732f5f67622d89c6af35049f0941fb2 SHA-256: 6ebe01130c4a63aafa48dd630e5aed7ea192eb647f86c59722182be5e7435e92

502 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample is a Microsoft Word document that exploits CVE-2007-3899, a memory corruption vulnerability, to execute arbitrary code. It contains a Document_Open macro that triggers the exploit and drops an embedded executable file. The embedded executable, detected as Win.Trojan.Rundis-9851624-0 by ClamAV, is likely a secondary payload designed to further compromise the system.

Heuristics 12

CVE-2007-3899 — Microsoft Word malformed string memory corruption critical CVE likely CVE_2007_3899

Word OLE document has the MS07-060 malformed-string exploit shape: a Word 97-family FIB points to a malformed DOP/string-table region with an abnormal INT_MAX run, inflated text counters, and exploit payload or Mdropper.Z campaign evidence.
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
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.
ClamAV: Win.Trojan.Rundis-9851624-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Rundis-9851624-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc API
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `ee7c8512a23a79337632bc16174fe402f9b196df1b5bfd79669c58db6453ca77`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	373 bytes
`embedded_office_0000327e.exe` `d39c915faf4ce17383f77f08166ff7c9679ee3d4437c7dee758ab9e6ca5bc795`	embedded-pe	Office MZ+PE at offset 0x327E	101250 bytes
Detection ClamAV: Win.Trojan.Rundis-9851624-0 Obfuscation or payload: unlikely
`ole10native_00.bin` `8a3522d9f4fdf4690e8e5bf16a446d23423b70a9beb6a08f62add699a2deca07`	ole-package	OLE Ole10Native stream: ObjectPool/_1091331676/Ole10Native	91632 bytes
Detection ClamAV: Win.Trojan.Rundis-9851624-0 Obfuscation or payload: likely Carved artifact entropy is 7.63, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.