Office (OLE) / .MSW malware analysis — malicious · e69ea2ebd4ff3e45

MALICIOUS

Office (OLE) / .MSW

785.0 KB Created: 1999-12-06 18:04:00 Authoring application: Microsoft Word 8.0

MD5: 41c34498989f97ca4269febba1b1c674 SHA-1: 8a071be48a8377cc152d3966b6f446d271a62115 SHA-256: e69ea2ebd4ff3e4536a4590ac9a77ca73b4a1043ea10dc39376f4e070dacba72

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file contains VBA macros, including AutoOpen and Auto_Close, and triggers a high-severity heuristic for the Equation Editor OLE object, indicating exploitation of CVE-2017-11882. ClamAV detections further confirm its malicious nature. The embedded macros likely download and execute a secondary payload, as suggested by the ClamAV signatures.

Heuristics 6

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
ClamAV: Doc.Trojan.VMPCK1-16 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.VMPCK1-16
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `2a8d38459ef04a2672d5a9d3b0276a31277cf3bf898e7155e06a4cd5a2d32e71`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	29059 bytes
Detection ClamAV: Doc.Trojan.Ozwer-1 Obfuscation or payload: unlikely
`ole10native_00.bin` `163edea69997f3ea7efc7217377ce91207a6661a6095179fcaf67c6bb8dc02f7`	ole-package	OLE Ole10Native stream: ObjectPool/_1005735890/Ole10Native	209732 bytes
`ole10native_01.bin` `c7fd6ce43357fa3e77f194e60def17f87d1f5b6eae28a4475dbb2c406d136c88`	ole-package	OLE Ole10Native stream: ObjectPool/_1005735972/Ole10Native	202820 bytes
`ole10native_02.bin` `9ae4762c4088602040b76a1c020579c30eaee58778fe17f730b9c4aa199357d7`	ole-package	OLE Ole10Native stream: ObjectPool/_1005736199/Ole10Native	69540 bytes
`ole10native_03.bin` `7791c5559580dac87c985624612244a8e9cdf7cc0e57a7b916107090cbe2a62d`	ole-package	OLE Ole10Native stream: ObjectPool/_1005983059/Ole10Native	207876 bytes

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