Press Release
Malware is now being concealed by hackers in Windows Event Logs.
Undocumented publicly for attacks in the wild, security researchers have discovered a malicious operation that leveraged Windows event logs to contain malware.
The assault’s threat actor was able to use the technology to introduce fileless malware into the file system as part of a covert attack using a variety of techniques and modules.
Payloads are added to Windows event logs.
After being recognised as a threat on a customer’s computer by a commercial product equipped with technologies for behavior-based detection and anomaly control, researchers at Kaspersky collected a sample of the virus.
According to the study, the malware utilised a sizable number of both custom-made and commercially available tools as part of a “highly targeted” effort.
One of the most intriguing aspects of the attack is the bespoke malware dropper’s injection of shellcode payloads into Windows event logs for the Key Management Services (KMS).
According to Kaspersky’s lead security researcher Denis Legezo, the malicious campaign marked the first time this technique had been deployed “in the field.”
At order to load malicious code via DLL search order hijacking, the dropper copies the genuine OS error handling programme WerFault.exe to “C:WindowsTasks” before dropping an encrypted binary resource to the “wer.dll” (Windows Error Reporting) in the same location.
A hacking method called DLL hijacking uses weak security checks in normal programmes to load a malicious Dynamic Link Library (DLL) into memory from any location.
According to Legezo, the dropper’s functions include looking for specific entries in the event logs (category 0x4142, or ‘AB’ in ASCII), as well as putting data onto the disc for the side-loading procedure. In the absence of such a record, it generates 8KB chunks of encrypted shellcode that are then merged to create the code for the subsequent stager.
Given that the source code for injecting payloads into Windows event logs has been publicly available for a short while, the new technique examined by Kaspersky is probably on its way to becoming more well-known.
Advanced technical actor
Legezo states that the overall campaign “looks remarkable” based on the numerous methods and modules (pen-testing suites, personalised anti-detection wrappers, and final stage trojans) utilised in it.
He claimed to an APT-level adversary, saying to BleepingComputer that “the actor behind the campaign is pretty adept by itself, or at least has a good set of quite sophisticated commercial tools.”
The commercial penetration testing frameworks Cobalt Strike and NetSPI were among the tools utilised in the attack (the former SilentBreak).
Although the researcher believes that some of the attack’s modules are original, they may really be a part of the NetSPI platform, which testing required a paid licence for.
For instance, two trojans with the names ThrowbackDLL.dll and SlingshotDLL.dll could represent tools that belong to the SilentBreak penetration testing framework and are known to use those names.
According to the research, the attack started in September 2021 when the victim fell for a scam to download a RAR archive from the file-sharing website file.io.
The Cobalt Strike module, which was signed with a certificate from the business Fast Invest ApS, was subsequently distributed by the threat actor. 15 files were signed with the certificate, but none of them were genuine.
According to the researcher, the ultimate goal of targeted malware with such last stager functionality is typically to collect some valuable data from the victims.
When analysing the attack, Kaspersky did not discover any resemblances to earlier efforts linked to a recognised threat actor.
The researchers label the new activity SilentBreak, after the name of the tool most frequently employed in the attack, until a connection with a known opponent is made.
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GitLab has patched a critical severity flaw that may have let remote attackers exploit hardcoded passwords to seize control of user accounts.
Both the Community Edition (CE) and Enterprise Edition of GitLab are impacted by the flaw, which was identified internally and is designated CVE-2022-1162 (EE).
During OmniAuth-based registration in GitLab CE/EE, static passwords were unintentionally set, which led to this vulnerability.
In a security advisory released on Thursday, the GitLab team stated that “a hardcoded password was set for accounts registered using an OmniAuth provider (e.g. OAuth, LDAP, SAML) in GitLab CE/EE versions 14.7 prior to 14.7.7, 14.8 prior to 14.8.5, and 14.9 prior to 14.9.2 allowing attackers to potentially take over accounts.”
In order to thwart such assaults, GitLab strongly advised users to update all GitLab installations right away to the most recent versions (14.9.2, 14.8.5, or 14.7.7).
We STRONGLY RECOMMEND UPGRADING TO THE LATEST VERSION AS SOON AS POSSIBLE FOR ALL INSTALLATIONS RUNNING A VERSION AFFECTED BY THE ISSUES DESCRIB
A code patch made two days ago reveals that GitLab removed the ‘lib/gitlab/password.rb’ file, which was used to give the ‘TEST DEFAULT’ constant a shoddy hardcoded password.
Some GitLab users had their passwords reset.
GitLab also stated that as part of the CVE-2022-1162 mitigation effort, it reset a select few GitLab.com users’ passwords.
Additionally, it did not discover any proof that any accounts had been compromised by hackers exploiting the hardcoded password security weakness.
As of 15:38 UTC, “We completed a reset of GitLab.com passwords for a chosen selection of users,” the GitLab staff stated.
Although there is no evidence to suggest that users’ or accounts’ security has been compromised, we are nonetheless taking precautions for our users’ safety.
A GitLab representative provided the information already included in the advisory with BleepingComputer when asked how many Gitlab.com users had their passwords reset, adding that they only did it for “a selected set of people.”
A programme to recognise affected user accounts
GitLab has developed a script that self-managed instance administrators can use to find user accounts that might be affected by CVE-2022-1162, despite the fact that the firm claims no user accounts have been compromised so far.
Administrators are urged to reset the users’ passwords after identifying any user accounts that might have been impacted.
GitLab claims that over 100,000 businesses utilise its DevOps platform, and it has over 30 million estimated registered users from 66 different nations.
Press Release
BOSTON-BASED VALO HEALTH, WHICH ANALYZES CLINICAL DATA TO IDENTIFY MOLECULES AND PREDICT THEIR CHANCES FOR USE IN DRUGS, RAISES $300M SERIES B (DANIEL MCCOY/WICHITA BUSINESS JOURNAL)
Boston-based Valo Health, which analyzes clinical data to identify molecules and predict their chances for use in drugs, raises $300M Series B — A Boston-based company working to improve the way drugs are brought to the market has secured $110 million in Series B funding from Koch Disruptive Technologies.
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