Office (OLE) / .DOC malware analysis — malicious · e75b2858a88962cf

MALICIOUS

Office (OLE) / .DOC

71.1 KB Created: 2018-11-08 10:52:00 Authoring application: Microsoft Office Word

MD5: 451ba7b81467b1f901b347d94e0b8bd8 SHA-1: 62b4acdf2515930af282ffac34e6e7e7bba8366c SHA-256: e75b2858a88962cfb7818a6908ad01a9682b0074e5f996cede0f59c8a83a3908

340 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1059.005 Visual Basic

The sample contains a Document_Open macro that executes a complex, obfuscated PowerShell command. This command reconstructs and executes a Base64-encoded string, which is then decompressed and read into a stream. The script then uses this stream to download and execute a second-stage payload. The presence of the Shell() call and the PowerShell execution strongly indicate a downloader or droppper functionality.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Downloader.Olemal-6923147-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Olemal-6923147-0
Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
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.
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
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` `f2907cd3fffbb113560fadd49ce4e2b97542fa4c4392d44daad64ac24b811332`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1512 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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