- Threat Encyclopedia
- Malware
- TROJ64_INSTOL.USR
Windows XP (64-bit), Windows Vista (64-bit), Windows 7 (64-bit)
This malware injects certain processes with its malicious component, forcing the download and execution of malware on the affected system.
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.
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 s DLL component is injected to the following process(es):
Other Details
This Trojan requires the following additional components to properly run:
NOTES:
This malware injects the normal process lsass.exe with its malicious DLL component detected as TROJ64_INJECT.USR.
It loads its DLL component using the following parameters:
where {string 1} and {string 2} are as follows:
It registers itself as a service to enable automatic execution on startup:
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
Scan your computer with your Trend Micro product and note files detected as TROJ64_INSTOL.USR
Step 3
Restart in Safe Mode
Step 4
Disable this malware service
Step 5
Search and delete the file detected as TROJ64_INSTOL.USR
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ64_INSTOL.USR. 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 this Knowledge Base page for more information.
NOTES:
Before performing the last step of the Solution procedure, first identify and delete the malware component detected as TROJ64_INJECT.USR.