Office (OLE) / .PPT malware analysis — malicious · 9e4134fbb243efdb

MALICIOUS

Office (OLE) / .PPT

81.5 KB Created: 2021-09-14 07:27:31 Authoring application: Microsoft Office PowerPoint

MD5: 5a5ff1cffdb0ea343fd5ab32c6eeb740 SHA-1: e372c4f53febe5c4d74a01eb6985e80a31d52e25 SHA-256: 9e4134fbb243efdb6d965eec21d98b4ad702e7fca13b5f1af47d30e3b0019585

322 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is a PowerPoint file containing a VBA macro with an Auto_Open subroutine. This macro utilizes Shell() to execute a command constructed from concatenated strings found in various form controls. The `Shell()` call is the primary indicator of malicious intent, suggesting the execution of a second-stage payload. The presence of `ShellExecute` and `mshta.exe` references further supports this. The macro's obfuscated string concatenation makes it difficult to determine the exact command executed, but the overall pattern indicates a downloader or dropper.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
Auto_Open macro high OLE_VBA_AUTO

Auto_Open 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.
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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
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://bitly.com/yuiwqhdsavbdjagh

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `5b91da562a883e858677f0c4c83cd34f71612d818d4846234e6ecd8c99a830e2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1728 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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