Office (OLE) / .PPT malware analysis — malicious · eae463318786a9aa

MALICIOUS

Office (OLE) / .PPT

63.5 KB Created: 2022-01-17 12:45:37 Authoring application: Microsoft Office PowerPoint

MD5: fcd9b67237833b1c758a3148d7767171 SHA-1: 57204b0a6a41a07422e755ebc2288e8ce6ad8877 SHA-256: eae463318786a9aa05640ffa98b32c62232d0881543eb2fd6550d50da8056af3

282 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1218.005 System Binary Proxy Execution: Mshta

The sample is a PowerPoint file containing a VBA macro with an Auto_Open subroutine. This subroutine calls a function in Class1 which in turn calls VBA.Shell() with a string constructed from UserForm1.karata.Tag. Heuristics indicate a Shell() call and a reference to mshta.exe, suggesting the script attempts to execute a command. The presence of 'mshta http://' in the document text further supports this, indicating the likely intent is to download and execute a second-stage payload via mshta.exe.

Heuristics 8

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_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.
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.
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 http://www.j.mp/ywuiqkbshagjhsa

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `09375cb312714107ebacd50ca928d024a481d66ebe172299bf73eddaecb1ec54`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	915 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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