YARA rules for CVE-2021-26858
1 rules · scoped to cve · back to CVE-2021-26858
YARA rules whose family, name, or description matches this cve or its tooling. Use these for binary-pattern hunts.
rule EXPL_LOG_CVE_2021_26858_Exchange_Forensic_Artefacts_Mar21_1 : LOG {
meta:
description = "Detects forensic artefacts found in HAFNIUM intrusions exploiting CVE-2021-26858"
author = "Florian Roth (Nextron Systems)"
reference = "https://www.volexity.com/blog/2021/03/02/active-exploitation-of-microsoft-exchange-zero-day-vulnerabilities/"
date = "2021-03-02"
score = 65
modified = "2021-03-04"
id = "f6fa90c7-c2c0-56db-bf7b-dc146761a995"
strings:
$xr1 = /POST (\/owa\/auth\/Current\/themes\/resources\/logon\.css|\/owa\/auth\/Current\/themes\/resources\/owafont_ja\.css|\/owa\/auth\/Current\/themes\/resources\/lgnbotl\.gif|\/owa\/auth\/Current\/themes\/resources\/owafont_ko\.css|\/owa\/auth\/Current\/themes\/resources\/SegoeUI-SemiBold\.eot|\/owa\/auth\/Current\/themes\/resources\/SegoeUI-SemiLight\.ttf|\/owa\/auth\/Current\/themes\/resources\/lgnbotl\.gif)/
condition:
$xr1
}