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

Static analysis result for SHA-256 03e38d6ebf710279…

MALICIOUS

Office (OLE) / .PPT

115.5 KB Created: 2020-11-25 12:27:07 Authoring application: Microsoft Office PowerPoint
MD5: 5f53cdcc629cffac51c4b535dc375aae SHA-1: 1faa85952dd26fd8e32fa1bd16143a0b6561724a SHA-256: 03e38d6ebf71027900aaf513e19769e0a34d42ae4999083446144c28d407938f
280 Risk Score

Malware Insights

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

The sample is a PowerPoint presentation containing obfuscated VBA macros. The Auto_Close macro, which is an auto-executing function, references ShellExecute and WScript, indicating it's designed to run external commands. The script attempts to download a payload from the reconstructed URL "tp://%898923849%898923849@j.mp/", which is then likely executed.

Heuristics 7

  • 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.
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c8b9f213892ace9e01b3ff43ca93db95d202606471fffc8d0ce1b607148c5c1a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 16143 bytes

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