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

Static analysis result for SHA-256 b311b08afa97c95e…

MALICIOUS

Office (OLE) / .PPT

66.5 KB Created: 2021-11-08 01:51:40 Authoring application: Microsoft Office PowerPoint
MD5: 68eea1a61599227696328114fd459c80 SHA-1: 2dee4488f06d520f8570d7d549d2aa336cc15427 SHA-256: b311b08afa97c95e90ad228da58b6178864dc281e4d24552df00c9ea6a788eae
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1218.004 Client Execution: Mshta

The sample is a PowerPoint file containing VBA macros. The Auto_close macro triggers the display of a user form, which then calls Shell() to execute mshta.exe with a URL. This indicates a likely attempt to download and execute a second-stage payload. The specific URL used is http://www.bitly.com/dhyuoaskhdkasdbja, which is passed to mshta.exe.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to mshta.exe high SC_STR_MSHTA
    Reference to mshta.exe
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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://www.google.com
    • http://www.bitly.com/dhyuoaskhdkasdbja

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
45ceb4296d9795e5c539ec0f0b2667896d61dc130b936219e6ed43fc2442e696		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 959 bytes

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