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

Static analysis result for SHA-256 496d93b684d9932b…

MALICIOUS

Office (OLE) / .PPT

69.0 KB Created: 2025-02-13 15:42:47
MD5: e39413d9a67acbc5df2d8b8c0a170f4b SHA-1: a909090d5f32429756d9a505ba9b12403dcb0d6c SHA-256: 496d93b684d9932b5e3d8b2f9a96d72fdf6ea5ddf8ff5749a50ab03add7bc815
348 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell

The sample contains a critical OLE_VBA_AUTO heuristic indicating an Auto_Open macro, which is designed to execute automatically when the document is opened. This macro utilizes Shell() and CreateObject calls, as evidenced by OLE_VBA_SHELL and OLE_VBA_CREATEOBJ, to download and execute a payload from the embedded URL http://couldmailauth.com/zhq93e8hsj93793892378hhxhb/Reghjok_64.dll. The presence of OLE_VBA_OBFUSCATED_SHELL_URL confirms the obfuscated nature of this command and URL.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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://couldmailauth.com/zhq93e8hsj93793892378hhxhb/Reghjok_64.dll

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c25f48a57abda2a8b9a31826b579a958c20fcb42be79748ace18662d911fcff9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3104 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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