Malicious RTF — malware analysis report

Static analysis result for SHA-256 f033ac1fcf28f980…

MALICIOUS

RTF

14.1 KB First seen: 2020-01-07
MD5: 1a25a03c470c6f899e8539043486cd5a SHA-1: 0f3ddde2a98a39ce513eee0ae7c9756122034d38 SHA-256: f033ac1fcf28f9807160f8ffd18fc964c43ffbffb5f04c903b19699dff83c73a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that leverages a known vulnerability in the Equation Editor (CVE-2017-11882). This exploit is designed to execute arbitrary code, which in this case is detected by ClamAV as Rtf.Exploit.CVE_2017_11882-6584355-1. The primary attack vector is likely spearphishing, with the RTF document acting as an attachment designed to trigger the exploit.

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: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
  • \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.

FilenameKindSourceSize
objdata_00_off00001758.bin rtf-objdata-decoded RTF \objdata at offset 0x1758 4155 bytes
SHA-256: a51490075eb808cbe12fd1d07f4bb1ba87c7d69235d938baec0e71543a75298e

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