Emotet Office (OLE) / .DOC malware analysis — malicious · a5f57fd90b883347

MALICIOUS

Office (OLE) / .DOC

185.0 KB Created: 2021-11-24 10:11:00 Authoring application: Microsoft Office Word

MD5: c12ad9353468794a33a4ba65980748d7 SHA-1: 8d06b1b4fcc320e9c0f59247c14037b1ff7b4c27 SHA-256: a5f57fd90b88334746613f04fd8e8c970f4b94b30cab8be9f370cb217d9f0653

242 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is identified as malicious by ClamAV with a specific Emotet signature. The VBA macro `macros.bas` contains obfuscated code that, when executed, reconstructs and attempts to download payloads from multiple URLs. The script also attempts to establish persistence by writing to a Run key, specifically reconstructing the path `HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy`. The presence of WinExec API calls and heap spray patterns further indicate malicious intent, likely to download and execute a second-stage payload.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRedDawn11210-9912807-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRedDawn11210-9912807-0
Heap-spray pattern detected high SC_HEAP_SPRAY

Repeated 0x07 bytes found
Reference to WinExec API high SC_STR_WINEXEC

Reference to WinExec API
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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
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` `3d8e72d52b5d32200311f6c91c1043b980c8bcbcb72a5cc3cecd6e3758f21ece`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20963 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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