Exploit for Deserialization of Untrusted Data in Siemens 6Bk1602-0Aa12-0Tp0_Firmware

Log4Shell（CVE-2021-44228）related attacks IOCs 源IP使用Apache Log4j RCE尝试攻击，其中包含很大部分Tor节点，详见Attack-IP.md 利用log4j漏洞传播的恶意程序、Botnet等IOC详见IOC-C2.md Snort检测规则详见Snort.md Suricata规则详见Suricata.md...

wolf-tools

wolf-tools Open source tools and scripts by Arctic Wolf:...

Cerber targeting organizations with publicly available exploits

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here. Cerber, ransomware that mysteriously vanished in 2019, has reappeared with a new encryption. The new cerber includes fresh source code and makes use of the new library Crypto+++, whereas the previous form made use of Windows...

Iranian Government-Sponsored APT Cyber Actors Exploiting Microsoft Exchange and Fortinet Vulnerabilities

CISA, the Federal Bureau of Investigation FBI, the Australian Cyber Security Centre ACSC, and the United Kingdom’s National Cyber Security Centre NCSC have released a joint Cybersecurity Advisory highlighting ongoing malicious cyber activity by an advanced persistent threat APT group that FBI,...

FBI Releases Indicators of Compromise Associated with Ranzy Locker Ransomware

The Federal Bureau of Investigation FBI has released a Flash report detailing indicators of compromise IOCs associated with attacks using Ranzy Locker, a ransomware variant first identified targeting victims in the United States in late 2020. CISA encourages users and administrators to review the...

SAS 2021: Learning to ChaCha with APT41

Straight from the sunny UK to the stage of SAS-at-Home 2021, John Southworth PwC will be giving some insights about the threat actor APT41, also known as Red Kelpie and Winnti. Starting with APT10 Red Apollo, the presentation will dance you through the malware used by APT41 – the Motnug loader an...

Working PoC Is Out for VMware vCenter CVE-2021-22005 Flaw

A fully working exploit for the critical CVE-2021-22005 remote code-execution RCE vulnerability in VMware vCenter is now public and being exploited in the wild. Released on Monday by Rapid7 security engineer William Vu who goes by the Twitter handle wvu, this one’s different from the incomplete...

SolarWinds Attackers Hit Active Directory Servers with FoggyWeb Backdoor

The threat actors behind the notorious SolarWinds supply-chain attacks have dispatched new malware to steal data and maintain persistence on victims’ networks, researchers have found. Researchers from the Microsoft Threat Intelligence Center MSTIC have observed the APT it calls Nobelium using a...

Detection evasion in CLR and tips on how to detect such attacks

In terms of costs, the age-old battle that pits attacker versus defender has become very one sided in recent years. Almost all modern attacks and ethical offensive exercises use Mimikatz, SharpHound, SeatBelt, Rubeus, GhostPack and other toolsets available to the community. This so-called...

Bring Your APIs Out of the Shadows to Protect Your Business

Pankaj Gupta, Senior Director, Citrix APIs are immensely more complex to secure. What was previously one request to one server has become dozens or hundreds of requests to dozens or hundreds of entities. In the past, you defended one large application with a single front door. Now you must defend...

Enbra Ewm数据伪造问题漏洞

Enbra Ewm is a universal reading device from the Czech company Enbra. It uses a radio to read water meters, heating cost indicators and heat meters. Enbra EWM is vulnerable to a data forgery issue in version 1.7.29, which stems from the fact that the software does not check for or detect replay...

This New Malware Family Using CLFS Log Files to Avoid Detection

Cybersecurity researchers have disclosed details about a new malware family that relies on the Common Log File System CLFS to hide a second-stage payload in registry transaction files in an attempt to evade detection mechanisms. FireEye's Mandiant Advanced Practices team, which made the discovery...

FBI Releases Indicators of Compromise Associated with Hive Ransomware

The Federal Bureau of Investigation FBI has released a Flash report detailing indicators of compromise IOCs and tactics, techniques, and procedures TTPs associated with ransomware attacks by Hive, a likely Ransomware-as-a-Service organization consisting of a number of actors using multiple...

FBI Releases Indicators of Compromise Associated with OnePercent Group Ransomware

The Federal Bureau of Investigation FBI has released a Flash report detailing indicators of compromise IOCs associated with ransomware attacks by the OnePercent Group, a cyber-criminal organization known since November 2020 for using Cobalt Strike in phishing attacks against U.S. companies. CISA...

Effective Threat-Hunting Queries in a Redacted World

A decade ago, hunting for adversary infrastructure was often as simple as monitoring a domain registrant’s name or phone number in public WHOIS records. As bad actors have moved first toward privacy protection services and then gained further obscurity behind laws such as the General Data...

Exploitation of Pulse Connect Secure Vulnerabilities

Summary The Cybersecurity and Infrastructure Security Agency CISA is aware of compromises affecting a number of U.S. government agencies, critical infrastructure entities, and other private sector organizations by a cyber threat actor—or actors—beginning in June 2020 or earlier related to...

CISA Releases Five Pulse Secure-Related MARs

As part of CISA’s ongoing response to Pulse Secure compromises, CISA has analyzed five malware samples related to exploited Pulse Secure devices. CISA encourages users and administrators to review the following five malware analysis reports MARs for threat actor tactics, techniques, and procedure...

Have you patched the vulnerabilities in Microsoft Exchange Server?

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here. Microsoft Exchange Server vulnerabilities have been officially patched for five months now. These vulnerabilities are actively exploited by multiple threat actors named DeadRinger. DeadRinger has been affecting the...

Chinese Hackers Implant PlugX Variant on Compromised MS Exchange Servers

A Chinese cyberespionage group known for targeting Southeast Asia leveraged flaws in the Microsoft Exchange Server that came to light earlier this March to deploy a previously undocumented variant of a remote access trojan RAT on compromised systems. Attributing the intrusions to a threat actor...

Chinese Gas Pipeline Intrusion Campaign, 2011 to 2013

Summary This Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge ATT &CK® framework, Version 9. See the ATT&CK for Enterprise for all referenced threat actor tactics and techniques. Note: CISA released technical information, including indicators of compromise IOCs,...