cbcvebase.
CVE-2018-0802
published 2018-01-10

CVE-2018-0802: Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execution vulnerability…

PriorityP189high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
KEVITWEXPLOITRansomware
CISA Known Exploited Vulnerabilitydue 2022-05-03
Exploited in the wild
EPSS
93.29%
99.8th percentile
Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Office Memory Corruption Vulnerability". This CVE is unique from CVE-2018-0797 and CVE-2018-0812.

Affected

20 ranges
VendorProductVersion rangeFixed in
microsoftoffice——
microsoftoffice——
microsoftoffice——
microsoftoffice——
microsoftword——
microsoftword——
microsoftword——
microsoftword——
msrcmicrosoft_office_2007_service_pack_3——
msrcmicrosoft_office_2010_service_pack_2——
msrcmicrosoft_office_2013_service_pack_1——
msrcmicrosoft_office_2016——
msrcmicrosoft_office_2016_click-to-run_for_32-bit_editions——
msrcmicrosoft_office_2016_click-to-run_for_64-bit_editions——
msrcmicrosoft_office_compatibility_pack_service_pack_3——
msrcmicrosoft_word_2007_service_pack_3——
msrcmicrosoft_word_2010_service_pack_2——
msrcmicrosoft_word_2013_rt_service_pack_1——
msrcmicrosoft_word_2013_service_pack_1——
msrcmicrosoft_word_2016——

Detection & IOCsextracted from sources · hover to see the quote

domainhelpdesk[.]autodefragapp[.]com↗
ip99[.]83[.]154[.]118↗
domainmswsceventlog[.]net↗
domainolmajhnservice[.]com↗
urlhxxp[:]//olmajhnservice[.]/nxl/nx↗
pathC:\$Utf↗
filenameRdxFactory.exe↗
pathC:\ProgramData\Cannon\Cannondriver.exe↗
pathC:\ProgramData\Cannon\LBTServ.dll↗
pathC:\ProgramData\Cannon\Microsoft.BT↗
hash719f25e1fea12c8dc573e7161458ce7a5b6683dee3a49bb21a3ec838d0b35dd3↗
hashcdf417e67b0aaf798ac7c0f9ccb8b5b21f09b408ee6748beea5e03e76902e7fe↗
domaindoc.internetdocss[.]com↗
urlhttp://doc.internetdocss[.]com/nethelpx86.dll↗
ip176.31.59.232↗
ip144.217.174.57↗
path%APPDATA%\[A-Za-z]{5}.vbs↗
  • →CVE-2018-0802 is exploited via Microsoft Equation Editor (EQNEDT32.EXE); detect spawning of EQNEDT32.EXE from Word or Excel processes, especially when it subsequently launches network connections or drops files. ↗
  • →Malicious RTF documents exploiting CVE-2018-0802 embed OLE objects with class name 'Equation 3.0'; hunt for RTF files containing this OLE class name. ↗
  • →Exploitation of CVE-2018-0802 via Royal Road (8.t RTF exploit builder) weaponized RTF files; detect RTF attachments crafted with this builder, which are known to exploit CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798. ↗
  • →Post-exploitation: monitor for creation of scheduled tasks named 'Rdx' and 'RdxFac' running every five minutes, and creation of folder 'RdxFact' in the Windows tasks folder. ↗
  • →Post-exploitation: monitor for RdxFactory.exe dropped into the public user profile's music folder (C:\Users\Public\Music\RdxFactory.exe). ↗
  • →Bitter APT emails sent via JavaMail with Zimbra web client version 8.8.15_GA_4101; this header string can be used to identify campaign-related phishing emails. ↗
  • →Shellcode from CVE-2018-0802 exploitation creates folder C:\$Utf to stage the downloaded payload; monitor for creation of this unusual directory. ↗
  • ·CVE-2018-0802 is frequently exploited alongside CVE-2017-11882 and CVE-2018-0798 in the same maldoc; detections and mitigations should account for all three vulnerabilities together, not just CVE-2018-0802 in isolation. ↗

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.09.3CRITICALAV:N/AC:M/Au:N/C:C/I:C/A:C
vulncheck8.8HIGH
cisa8.8HIGH
vendor_msrc7.8HIGH
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