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Log4j overview IoCs

This page contains an overview of any Indicators of Compromise regarding the Log4j vulnerability. On this page NCSC-NL will maintain a list of all known IOCs which can be used to detect and block. Furthermore any references will contain specific information regarding indicator reports.

NCSC-NL has not verified the IoCs listed below and therefore cannot guarantee the validity of said rules. However NCSC-NL strives to provide IoCs from reliable sources.

Network related IoC's

Note Links
The list of callback servers, updated by Greynoise https://gist.github.com/superducktoes/9b742f7b44c71b4a0d19790228ce85d8
The list of scanning IP's, updated by Greynoise https://gist.github.com/gnremy/c546c7911d5f876f263309d7161a7217
Threatfox https://threatfox.abuse.ch/browse/tag/log4j/
UrlHaus https://urlhaus.abuse.ch/browse/tag/log4j/
Malware Bazaar https://bazaar.abuse.ch/browse/tag/log4j/
CTCI https://docs.google.com/spreadsheets/d/e/2PACX-1vT1hFu_VlZazvc_xsNvXK2GJbPBCDvhgjfCTbNHJoP6ySFu05sIN09neV73tr-oYm8lo42qI_Y0whNB/pubhtml#
Malwar3Ninja https://twitter.com/bad_packets/status/1469225135504650240
GovCert.ch https://www.govcert.ch/blog/zero-day-exploit-targeting-popular-java-library-log4j/
isc.sans.edu https://isc.sans.edu/diary/Log4Shell+exploited+to+implant+coin+miners/28124
cert-agid.gov.it (Contains scan IP's) https://cert-agid.gov.it/download/log4shell-iocs.txt
jamesspi (Contains scan IP's) https://log4shell.threatsearch.io/
Nozomi Networks https://www.nozominetworks.com/blog/critical-log4shell-apache-log4j-zero-day-attack-analysis/
NLD Police https://thanksforallthefish.nl/log4j_hashes.txt (Thor format) Auto Updated every 15min
NLD Police https://thanksforallthefish.nl/log4j_hashes_sha256.txt (line-by-line) Auto Updated every 15min
NLD Police https://thanksforallthefish.nl/log4j_hashes_sha1md5.txt (line-by-line) Auto Updated every 15min
NLD Police https://thanksforallthefish.nl/log4j_domains.txt (Thor format) Auto Updated every 15min
NLD Police https://thanksforallthefish.nl/log4j_urls.txt (line-by-line) Auto Updated every 15min
NLD Police https://thanksforallthefish.nl/log4j_blocklist.txt (line-by-line) Not Verified

List of IoC's from security vendors

Note Date of Report Link
Talos Intelligence Almost Daily https://blog.talosintelligence.com/2021/12/apache-log4j-rce-vulnerability.html
360 Netlab 11-12-2021 https://blog.netlab.360.com/threat-alert-log4j-vulnerability-has-been-adopted-by-two-linux-botnets/
360 Netlab (Additional) 13-12-2021 https://blog.netlab.360.com/ten-families-of-malicious-samples-are-spreading-using-the-log4j2-vulnerability-now/
Microsoft(Contains scan IP's) Almost Daily https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/Log4j_IOC_List.csv
RedDrip7 15-12-2021 https://github.com/RedDrip7/Log4Shell_CVE-2021-44228_related_attacks_IOCs
CrowdSec (Scan IP validation) Dynamically updated https://gist.github.com/blotus/f87ed46718bfdc634c9081110d243166
Cyble 13-12-2021 https://blog.cyble.com/2021/12/13/log4j-rce-0-day-vulnerability-in-java-actively-exploited/
Fortinet 21-12-2021 https://www.fortinet.com/blog/threat-research/critical-apache-log4j-log4shell-vulnerability-what-you-need-to-know
NCC Group (Contains scan IP's) 12-12-2021 https://research.nccgroup.com/2021/12/12/log4shell-reconnaissance-and-post-exploitation-network-detection/
Lacework 12-12-2021 https://www.lacework.com/blog/lacework-labs-identifies-log4j-attackers/
Securelist by Kaspersky 13-12-2021 https://securelist.com/cve-2021-44228-vulnerability-in-apache-log4j-library/
RiskIQ (IP's contain scan IP's) 13-12-2021 https://community.riskiq.com/article/57abbfcf/indicators
Valtix 14-12-2021 https://valtix.com/blog/log4shell-observations/
Infoblox 13-12-2021 https://blogs.infoblox.com/cyber-threat-intelligence/cyber-campaign-briefs/log4j-exploit-harvesting/
Orange Cyberdefense (IP's contain scan IP's) Almost Daily https://github.com/Orange-Cyberdefense/log4shell_iocs

List of IoC's from Honeypot's

Note Date of Report Threat Links
GelosSnake 10-12-2021 Kinsing https://twitter.com/GelosSnake/status/1469341429541576715
CronUp 13-12-2021 Kinsing, Mirai, Muhstik https://github.com/CronUp/Malware-IOCs/blob/main/2021-12-11_Log4Shell_Botnets
CronUp (2) 19-12-2021 Kinsing, Mirai https://github.com/CronUp/Malware-IOCs/blob/main/2021-12-19_MiraiLog4ShellWorm
yt0ng 15-12-2021 Muhstik, Monero Miner https://gist.github.com/yt0ng/8a87f4328c8c6cde327406ef11e68726
Maik Morgenstern 16-12-2021 Backdoor.Ganiw.A https://twitter.com/TriggerMeHappy/status/1471488408916615169
eromang 21-12-2021 Backdoor.Ganiw.A, Mirai, Monero Miner https://github.com/eromang/researches/tree/main/CVE-2021-44228
NOC.org Dynamicly updated Various https://reputation.noc.org/jndi-attack-logs/

Twitter IoC search tool

Note Links
TweetFeed https://twitter.com/0xdaniellopez/status/1470029308152487940?s=21