Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 598f4268fe328d18…

MALICIOUS

Office (OLE) / .DOC

12.0 KB First seen: 2022-12-04
MD5: 1ceb5551dfa7bf327685dfa2c545d28a SHA-1: c3ed83391e4749a8fefde51af231789e7f9e60ef SHA-256: 598f4268fe328d1854683a135b46adde25f464427034854a599e9d25a0f4e15e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Service Execution T1218.010 System Binary Proxy Execution: Regsvr32 T1059.001 Command and Scripting Interpreter: PowerShell T1566.001 Phishing: Spearphishing Attachment

The sample contains a VBA macro with an AutoOpen subroutine that executes a command using Shell(). The command utilizes regsvr32 to download and execute a script from the URL http://192.168.56.102:8080/ckL4H7Dey.sct. This indicates a downloader or dropper functionality, aiming to fetch and run a secondary payload.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://192.168.56.102:8080/ckL4H7Dey.sct
    • http://192.168.56.102:8080/ckL4H7Dey.sc

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0e047dd92c2b0abf9749ead88f3ef03cb05ac645681ea5653e721e94354c0c14		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 469 bytes

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