Backdoor.Win64.WINNTI.ZCKK-A
TR/Inject.Gen (ANTIVIR)
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It listens on port(s). It executes commands from a remote malicious user, effectively compromising the affected system.
TECHNICAL DETAILS
Arrival Details
This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Backdoor Routine
This Backdoor listens on the following port(s):
- 30325
It executes the following commands from a remote malicious user:
- Execute arbitrary commands
Information Theft
This Backdoor gathers the following data:
- User and System Default Language ID
- Timezone Information
- Username
- Computer Name
- Remote Desktop Host session
- OS Version
- System's Locale
Other Details
This Backdoor does the following:
- It requires being registered as a service to properly execute.
- It decrypts and executes the following file in memory which contains the backdoor routine:
- RstMwService.dat → detected as Backdoor.Win64.WINNTI.ZCKK-A.enc
- It may use the following to resolve the C2 domain:
- {BLOCKED}.{BLOCKED}.{BLOCKED}.222
SOLUTION
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
-
TSPY.Win32.TRX.XXPE50FFF074
Step 2
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 3
Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win64.WINNTI.ZCKK-A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:
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