TrojanDownloader:PowerShell/Credcalper (MICROSOFT); HEUR:Trojan.PowerShell.Generic (KASPERSKY); Mal/PSDL-J (SOPHOS)
Windows
This malware is a PowerShell script responsible for downloading and dropping other files. It is implicated in a malicious cryptocurrency-mining activity that features a malware propagating via various methods.
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It takes advantage of certain vulnerabilities.
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan drops the following files:
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following processes:
It adds the following mutexes to ensure that only one of its copies runs at any one time:
Information Theft
This Trojan gathers the following data:
Other Details
This Trojan does the following:
It takes advantage of the following vulnerabilities:
Step 1
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 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Identify and terminate files detected as Trojan.PS1.PCASTLE.B
Step 4
Deleting Scheduled Tasks
The following {Task Name} - {Task to be run} listed should be used in the steps identified below:
For Windows 2000, Windows XP, and Windows Server 2003:
For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
Step 5
Search and delete these files
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.PS1.PCASTLE.B. 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: