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

Static analysis result for SHA-256 63847932d54188b9…

MALICIOUS

Office (OLE) / .PPT

92.5 KB Created: 2022-12-06 12:26:16 Authoring application: Microsoft Office PowerPoint
MD5: a2de1f778770cd1489a3a29b0dfa8438 SHA-1: 1caf1b5312125943a2239271793d96a1960af474 SHA-256: 63847932d54188b97ed7513f8d630da0a3266f3e51ff97dd0971c760d7959538
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1140 Deobfuscate or Obfuscate Malicious Code T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a PowerPoint file containing VBA macros. The Auto_Close macro triggers the execution of a function that uses WScript.Shell to create an object and then calls Shell() to execute a command. This command concatenates strings to form a URL and attempts to download and execute a payload from 'https://bitbucket.org/!api/2.0/snippets/newwork123social/REKMzj/a8d5f1dc340d41367b523aded8f0b676177bc7d9/files/blackstart.txt'. The use of WScript.Shell and Shell() indicates a high likelihood of downloading and executing a second-stage payload.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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
  • 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://bitbucket.org/!api/2.0/snippets/newwork123social/REKMzj/a8d5f1dc340d41367b523aded8f0b676177bc7d9/files/blackstart.txt

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6d858c7565940cd641d13568f59e39658d159b2d54bc751f3c5d433da03ab9c4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1387 bytes

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