Office (OLE) / .PPT malware analysis — malicious · b383d745a0b7bfcf

MALICIOUS

Office (OLE) / .PPT

185.5 KB Created: 2021-02-01 05:25:35 Authoring application: Microsoft Office PowerPoint

MD5: 599be4b2dbb374a7cbd136b2530cfca8 SHA-1: baa43885261b66ffdb8baa38a95dd138455c6768 SHA-256: b383d745a0b7bfcf07afd921c690527f8180972849a22accc6b94eba5bb1a926

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically an Auto_Close function, which is a common technique for executing malicious code upon document closure. The critical heuristic firing indicates a Shell() call within the VBA code, suggesting the macro attempts to run an external command. This is likely used to download and execute a second-stage payload, although no specific URLs or commands were extracted from the provided evidence. The presence of VBA macros and the use of Shell() point towards a macro-based malware delivery.

Heuristics 4

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `896c22d019243bb398139d73b492deebf3b6771a820c0150078af4cecfc962b1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	118192 bytes

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