Office (OLE) / .DOC malware analysis — malicious · a1400765e9663e5d

MALICIOUS

Office (OLE) / .DOC

42.5 KB Created: 2017-05-12 15:03:00 Authoring application: Microsoft Office Word First seen: 2022-03-18

MD5: aa088b5feb939189376f8ff847810542 SHA-1: 2adc19991578ec1fa66dc354555f08c964c1a146 SHA-256: a1400765e9663e5d9371ec55bb1080e32213380239b695f101d9910d072268fa

430 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1055 Process Injection

The sample is a malicious OLE document containing VBA macros. The macros utilize Windows API calls such as VirtualAllocEx, WriteProcessMemory, and CreateRemoteThread to inject and execute a payload. The presence of AutoOpen and Workbook_Open macros indicates an attempt to automatically run the malicious code upon opening the document. The ClamAV detection 'Doc.Malware.Valyria-10012625-0' further supports the malicious nature.

Heuristics 12

Reference to WriteProcessMemory API critical SC_STR_WRITEPROCESSMEMORY

Reference to WriteProcessMemory API
Reference to CreateRemoteThread API critical SC_STR_CREATEREMOTETHREAD

Reference to CreateRemoteThread API
ClamAV: Doc.Malware.Valyria-10012625-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10012625-0
Reference to CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
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.
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc API
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `77496cddb07abcb4590d3ac3b4f3babb386760b4fa9067d43bdc7a60177afb00`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7873 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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