Office (OLE) / .DOC malware analysis — malicious · 46c73a1fc551cce3

MALICIOUS

Office (OLE) / .DOC

511.0 KB Created: 2022-09-12 00:03:00 Authoring application: Microsoft Office Word First seen: 2022-09-13

MD5: 3e67fa3932cf3524818fb6756d0ebb57 SHA-1: 70ddef81a49ad590c63fd5122027308b7c927413 SHA-256: 46c73a1fc551cce324b01becf9bfc7e72116753dde2a05b022ed33bf4dd6b11e

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1071.001 Web Protocols

The sample is a malicious Office document containing a VBA macro. The macro is obfuscated and designed to execute automatically upon opening, as indicated by the 'Document_Open' and 'Shell()' call heuristics. The macro likely downloads and executes a second-stage payload from the URL 'https://gallagherseals.ml/doc/NYKMJWLGAQ.exe', as suggested by the embedded URL and the 'SE_ENABLE_LURE' heuristic indicating a prompt to enable macros.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER

Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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 https://gallagherseals.ml/doc/NYKMJWLGAQ.exe
- http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `e31f451e4505f189d2c6c0161bd3098dd2ba6c0d62f222ed9052bc4c6679e0e1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	75279 bytes

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