krb5: Kerberos RC4-HMAC-MD5 Checksum Vulnerability Enabling Message Spoofing via MD5 Collisions

A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This ma...

krb5: Kerberos RC4-HMAC-MD5 Checksum Vulnerability Enabling Message Spoofing via MD5 Collisions

A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This ma...

CVE-2018-17177

An issue was discovered on Neato Botvac Connected 2.2.0 and Botvac 85 1.2.1 devices. Static encryption is used for the copying of so-called "black box" logs event logs and core dumps to a USB stick. These logs are RC4-encrypted with a 9-character password of ^JEd4W!I that is obfuscated by hiding ...

CVE-2017-15997

In the "NQ Contacts Backup & Restore" application 1.1 for Android, RC4 encryption is used to secure the user password locally stored in shared preferences. Because there is a static RC4 key, an attacker can gain access to user credentials more easily by leveraging access to the preferences XML fi...

SMB Fetch, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Fetch and execute an x64 payload from an SMB server. Connect back to the attacker Module Options msf use payload/cmd/windows/smb/x64/vncinject/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf payloadreversetcprc4 show options ...show and se...

HTTP Fetch, Windows x64 Command Shell, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Fetch and execute an x64 payload from an HTTP server. Spawn a piped command shell Windows x64 staged. Connect back to the attacker Module Options msf use payload/cmd/windows/http/x64/shell/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf...

HTTPS Fetch, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Fetch and execute an x64 payload from an HTTPS server. Connect back to the attacker Module Options msf use payload/cmd/windows/https/x64/meterpreter/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf payloadreversetcprc4 show options ...show...

ALPINE-CVE-2022-45141

Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov 8 2022 and per RFC8429 it is assumed that rc4-hmac is weak, Vulnerable Samba Active Directory DCs will issue rc4-hmac encrypted tickets despite the target server supporting better encryption...

Raspberry Robin Worm Evolves to Attack Financial and Insurance Sectors in Europe

Financial and insurance sectors in Europe have been targeted by the Raspberry Robin worm, as the malware continues to evolve its post-exploitation capabilities while remaining under the radar. "What is unique about the malware is that it is heavily obfuscated and highly complex to statically...

The vulnerability of the Kerberos protocol for Windows operating systems allows attackers to increase their privileges.

The vulnerability of the Kerberos protocol for Windows operating systems lies in the use of the cryptographic algorithm RC4-HMAC, which has vulnerabilities. Exploiting this vulnerability can allow a malicious actor to enhance their privileges remotely...

RC4 Is Still Considered Harmful

By James Forshaw, Project Zero I've been spending a lot of time researching Windows authentication implementations, specifically Kerberos. In June 2022 I found an interesting issue number 2310 with the handling of RC4 encryption that allowed you to authenticate as another user if you could either...

Windows shellcode stage, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Custom shellcode stage. Connect back to the attacker Module Options msf use payload/windows/custom/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf payloadreversetcprc4 show options ...show and set options... msf payloadreversetcprc4 run --...

Powershell Exec, Windows shellcode stage, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Execute an x64 payload from a command via PowerShell. Custom shellcode stage. Connect back to the attacker Module Options msf use payload/cmd/windows/powershell/x64/custom/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf payloadreversetcprc...

Powershell Exec, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Execute an x86 payload from a command via PowerShell. Connect back to the attacker Module Options msf use payload/cmd/windows/powershell/patchupdllinject/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf payloadreversetcprc4 show options...

Powershell Exec, Bind TCP Stager (RC4 Stage Encryption, Metasm)

Execute an x86 payload from a command via PowerShell. Listen for a connection Module Options msf use payload/cmd/windows/powershell/vncinject/bindtcprc4 msf payloadbindtcprc4 show actions ...actions... msf payloadbindtcprc4 set ACTION msf payloadbindtcprc4 show options ...show and set options...

Powershell Exec, Reverse TCP Stager (RC4 Stage Encryption, Metasm)

Execute an x86 payload from a command via PowerShell. Connect back to the attacker Module Options msf use payload/cmd/windows/powershell/dllinject/reversetcprc4 msf payloadreversetcprc4 show actions ...actions... msf payloadreversetcprc4 set ACTION msf payloadreversetcprc4 show options ...show an...

Raccoon Stealer Bundles Malware, Propagates Via SEO

Criminals behind the Raccoon Stealer platform have updated their services to include tools for siphoning cryptocurrency from a target’s computer and new remote access features for dropping malware and scooping up files. The stealer-as-a-service platform, whose customers are typically rookie...

Python-based Spy RAT Emerges to Target FinTech

The Evilnum group, which specializes in targeting financial technology companies, has debuted a new tool: A Python-based remote access trojan RAT, dubbed PyVil. The malware’s emergence dovetails with a change in the chain of infection and an expansion of infrastructure for the APT. According to...

Windows Inject PE Files, Reverse TCP Stager (RC4 Stage Encryption DNS, Metasm)

Inject a custom native PE file into the exploited process using a reflective PE loader. The reflective PE loader will execute the pre-mapped PE image starting from the address of entry after performing image base relocation and API address resolution. This module requires a PE file that contains...

Windows Inject PE Files, Bind TCP Stager (RC4 Stage Encryption, Metasm)

Inject a custom native PE file into the exploited process using a reflective PE loader. The reflective PE loader will execute the pre-mapped PE image starting from the address of entry after performing image base relocation and API address resolution. This module requires a PE file that contains...