TROJ_DLOADR.RFV
Win32/TrojanDownloader.Small.PSD trojan(NOD32),Trojan.Win32.Generic.pak!cobra(Sunbelt)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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
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 saves the files it downloads using the following names:
- %User Temp%\mss{value}.exe
- %Temporary Internet Files%\Content.IE5\{random}\{successful downloaded url file name}[1].txt - (example: %Temporary Internet Files%\Content.IE5\{random}\discreteness[1].txt)
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista and 7.)
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 connects to the following possibly malicious URL:
- http://{BLOCKED}chanics.com/spengler/beatle
- http://{BLOCKED}astersandiego.com/impugning/felsitic
- http://{BLOCKED}universe.ca/bided/discreteness
- http://{BLOCKED}.{BLOCKED}.161.78/mishapping/fleeceable
- http://www.{BLOCKED}s.net/dyslexia/horizonless
- http://{BLOCKED}60.co.uk/mervin/number
- http://{BLOCKED}ttoplay.co.uk/duffer/salutations
- http://{BLOCKED}icekitchencabinets.ca/abettor/unfloured
- http://{BLOCKED}.{BLOCKED}.41.251/goiters/wonderless
- http://{BLOCKED}tcollection.com/adverb/songless
- http://www.{BLOCKED}boutiquehotelsandvillas.com/qualm/onder
- http://{BLOCKED}-flooring.org.uk/stern/just
- http://{BLOCKED}enta.co/mores/wait
- http://{BLOCKED}temas.com.ar/ennobles/moment
- http://{BLOCKED}o.com/carped/loose
- http://{BLOCKED}ytours.ca/precluding/enlarge
- http://www.{BLOCKED}decontracts.co.uk/racked/pennis
- http://{BLOCKED}ndcommercials.co.uk/transepts/your
- http://{BLOCKED}hofeck.de/gerardo/biggest
- http://{BLOCKED}a.com.tr/pennons/fan
- http://ftp.{BLOCKED}es.org/cajoling/make
- http://{BLOCKED}s.co.za/willing/hill
- http://{BLOCKED}lineuk.co.uk/habit/day
- http://{BLOCKED}uialadivinamisericordia.com/starless/free
- http://{BLOCKED}hofeck.de/motors/media
- http://{BLOCKED}o.com/cruelly/wayder
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 2
Search and delete these files
- %User Temp%\mss{value}.exe
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.RFV. 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:
To delete %Temporary Internet Files%\Content.IE5\{random folder}\{successful downloaded url file name}[1].txt, do the following:
- Go to Start>Search.
- Click all files and folders and input the following information:
All or part of the file name: {successful downloaded url file name}
Look in %Temporary Internet Files% - Once located, select the file then press SHIFT+DELETE.
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