Emotet Office (OLE) / .DOC malware analysis — malicious · a8acc4768516ff18

MALICIOUS

Office (OLE) / .DOC

236.3 KB Created: 2020-02-07 13:40:00 Authoring application: Microsoft Office Word

MD5: 778d5ca4d72f0af4bcede94af4a595fa SHA-1: cfce571fc611a68504bdd2f34c777f2b620fac78 SHA-256: a8acc4768516ff18e3aa0eadc8b3e47053ee02c2c40307bd06d4a4381a91a143

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1140 Deobfuscate or Obfuscate

The file contains VBA macros, specifically a Document_Open macro that utilizes CreateObject to execute code. Critical heuristics indicate a hidden UserForm command stager, a common technique for Emotet. The ClamAV detection explicitly names 'Doc.Downloader.Emotet-7580201-0', strongly suggesting the Emotet family. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 8

VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER

VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
ClamAV: Doc.Downloader.Emotet-7580201-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-7580201-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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` `118be45ec3b2dfe63391f034c8a12e159718c7d411498b5b4a41bb83a584c243`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10822 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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