Home / malware TrojanDownloader:Win32/Lentrigy.A
First posted on 17 August 2015.
Source: MicrosoftAliases :
There are no other names known for TrojanDownloader:Win32/Lentrigy.A.
Explanation :
Threat behavior
Installation
This threat can create files on your PC, including:
- %TEMP%\is-umrp1.tmp\_isetup\_shfoldr.dll
- %TEMP%\is-umrp1.tmp\bass.dll
- %TEMP%\is-umrp1.tmp\bp.dll
- %TEMP%\is-umrp1.tmp\isdone.dll
- %TEMP%\is-umrp1.tmp\vclstylesinno.dll
- %TEMP%\is-umrp1.tmp\wintb.dll
- %TEMP%\ixp000.tmp\autoplay.exe
- %TEMP%\ixp000.tmp\setup.exe
The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.
Payload
Downloads malware or unwanted software
This threat can download other malware and unwanted software onto your PC.
Connects to a remote host
We have seen this threat connect to a remote host, including:Malware can connect to a remote host to do any of the following:
- g62vbnbdd5.rlkwg.net using port 80
- Check for an Internet connection
- Download and run files (including updates or other malware)
- Report a new infection to its author
- Receive configuration or other data
- Receive instructions from a malicious hacker
- Search for your PC location
- Upload information taken from your PC
- Validate a digital certificate
Additional information
Creates a mutex
This threat can create one or more mutexes on your PC. For example:
- RstrMgr3887CAB8-533F-4C85-B0DC-3E5639F8D511
- RstrMgr-3887CAB8-533F-4C85-B0DC-3E5639F8D511-Session0000
It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.
This malware description was published using automated analysis of file SHA1 93bc5a6e0e54335b7d1f2d31c701ae77bb92c0ae.
Symptoms
The following can indicate that you have this threat on your PC:
- You see a file similar to:
- %TEMP%\is-umrp1.tmp\_isetup\_shfoldr.dll
- %TEMP%\is-umrp1.tmp\bass.dll
- %TEMP%\is-umrp1.tmp\bp.dll
- %TEMP%\is-umrp1.tmp\isdone.dll
- %TEMP%\is-umrp1.tmp\vclstylesinno.dll
- %TEMP%\is-umrp1.tmp\wintb.dll
- %TEMP%\ixp000.tmp\autoplay.exe
- %TEMP%\ixp000.tmp\setup.exe
- You see the following mutex:
- RstrMgr3887CAB8-533F-4C85-B0DC-3E5639F8D511
- RstrMgr-3887CAB8-533F-4C85-B0DC-3E5639F8D511-Session0000
Last update 17 August 2015
