BKDR_FYNLOS.SM1
Trojan:Win32/Cryptrun.B (Microsoft), Generic FakeAlert!wf (McAfee), Trojan.Gen.2 (Symantec), Trojan-Downloader.Win32.FraudLoad.zpjm (Kaspersky)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be dropped by other malware.
It does not have any propagation routine.
It does not drop any other file.
It does not have any information-stealing capability.
TECHNICAL DETAILS
Arrival Details
This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It may be dropped by the following malware:
- BKDR_FYNLOS.SM
Propagation
This backdoor does not have any propagation routine.
Backdoor Routine
This backdoor opens the following ports:
- 80
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}3.{BLOCKED}8.242.84
Dropping Routine
This backdoor does not drop any other file.
Information Theft
This backdoor does not have any information-stealing capability.
Other Details
This backdoor connects to the following URL(s) to check for an Internet connection:
- http://www.google.com/search?qu=
NOTES:
It connects to its command-and-control(C&C) server using the parameter:
- /search{numbers}?h1={value}&h2={value}&h3={encoded computer name}&h4={encoded volume serial number}
- Download and upload files
- Execute, delete or copy files
- List or terminate processes
- List or change directories
- Perform shell commands
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
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 3
Identify and terminate files detected as BKDR_FYNLOS.SM1
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_FYNLOS.SM1. 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.
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