RTF malware analysis — malicious · dacb0ebb51a13d01

MALICIOUS

RTF

8.2 KB First seen: 2018-11-13

MD5: 4a4836a276df0f1b57b74a5be0d6f43b SHA-1: 6e52f23bafe587c854dbf666141b41175fe507f4 SHA-256: dacb0ebb51a13d0154b6397c62bc074ed549c2260cac37ea425d3fcc875d762e

180 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is an RTF document that contains embedded OLE object data. Heuristics indicate the presence of an Equation Editor exploit, specifically CVE-2017-11882, which is a critical vulnerability. This exploit allows for arbitrary code execution on the victim's machine.

Heuristics 4

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
\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_off0000003b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3B	4146 bytes
SHA-256: `5b0673fb78d9badf5d75bd3d32be1b1c1bd55e92bee97bda956b6e02bd7bde0a`

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