Office (OLE) / .PPT malware analysis — malicious · a58ed2535dc9019e

MALICIOUS

Office (OLE) / .PPT

67.5 KB Created: 2021-09-05 21:30:57 Authoring application: Microsoft Office PowerPoint

MD5: df5c9140081ad313c47dd26be1682fc8 SHA-1: 321969b16da86fab356e14b576a6b1ad4b68283f SHA-256: a58ed2535dc9019eab137280da8ffbfc91cdf4f665a03ffc3f230ae2637435f9

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell

The PowerPoint file contains VBA macros that are automatically executed upon closing the document via the Auto_close function. The script reconstructs the string 'mshta' and a URL 'https://www.bitly.com/qwghidukabsmdqwdhkasmbda'. It then uses ShellExecute to run 'mshta' with the reconstructed URL, likely to download and execute a second-stage payload. The use of Auto_close and ShellExecute indicates a malicious intent to deliver further malware.

Heuristics 6

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
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
Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f7ed3f1bf5f26a7c8a61340ef52f03b8924347aa8eb698744adc9a1b4226c40`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1515 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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