RTF malware analysis — malicious · 04714ec4a9cfa030

MALICIOUS

RTF

78.2 KB First seen: 2024-07-29

MD5: 7279ab0fbc0a02d8b6966ed3cdf67aca SHA-1: 4a6bef6dba00cc872e10b66b00786ace03e6443a SHA-256: 04714ec4a9cfa0304d2de5012ae1081850d2a2b080ad68831ba2c8385bda4d01

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is an RTF document that contains an embedded OLE object, specifically targeting the Equation Editor vulnerability. The ".objupdate" directive indicates that the embedded object will be activated automatically upon opening the document. This is a common technique for exploiting the Equation Editor vulnerability (CVE-2017-11882) to download and execute a second-stage payload.

Heuristics 3

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000a72.bin` `07dfda6b5f1a522e223f7c0f8992e3cf90d2fcbbbb8b768a528150cdb0da96b6`	rtf-objdata-decoded	RTF \objdata at offset 0xA72	1707 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.