TROJ_RANSOM.YMKJ
ALIASES:
Found Win32/DH{AAE2NYESfWJk} (AVG)
PLATFORM:
Windows
OVERALL RISK RATING:
DAMAGE POTENTIAL:
DISTRIBUTION POTENTIAL:
REPORTED INFECTION:
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.
TECHNICAL DETAILS
File Size:
274,944 bytes
File Type:
EXE
Memory Resident:
No
Initial Samples Received Date:
19 Dec 2014
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 creates the following folders:
- %System Root%\winlogtmp
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
Other System Modifications
This Trojan deletes the following files:
- %User Profile%\Sample Pictures\Blue hills.jpg
- %User Profile%\Sample Pictures\Sunset.jpg
- %User Profile%\Sample Pictures\Water lilies.jpg
- %User Profile%\Sample Pictures\Winter.jpg
- %User Profile%\Internet Explorer\brndlog.txt
- %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.XML
- %User Profile%\Templates\excel.xls
- %User Profile%\Templates\excel4.xls
- %User Profile%\Templates\powerpnt.ppt
- %User Profile%\Templates\winword.doc
- %User Profile%\Templates\winword2.doc
- %User Profile%\Cookies\wilbert@atdmt[2].txt
- %User Profile%\Cookies\wilbert@bing[2].txt
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt
- %User Profile%\Cookies\wilbert@c.msn[2].txt
- %User Profile%\Cookies\wilbert@doubleclick[1].txt
- %User Profile%\Cookies\wilbert@microsoft[1].txt
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt
- %User Profile%\Cookies\wilbert@msn[2].txt
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt
- %User Profile%\Cookies\wilbert@www.bing[2].txt
- %User Profile%\Cookies\wilbert@www.msn[1].txt
Dropping Routine
This Trojan drops the following files:
- SoundPrologik.exe
- qwin.bat
- Norton Nimnul
- pubring.pgp
- randseed.bin
- pgp.ex
- ren.bat
- FatCat
- systram.exe
- %User Temp%\FatCat.$00
- %User Temp%\FatCat.$01
- %User Temp%\FatCat.$02
- FatCat.asc
- %User Profile%\Sample Pictures\Blue hills.jpg.CHIP
- %User Profile%\Sample Pictures\Blue hills.jpg.CHIPDALE
- %User Profile%\Sample Pictures\Sunset.jpg.CHIP
- %User Profile%\Sample Pictures\Sunset.jpg.CHIPDALE
- %User Profile%\Sample Pictures\Water lilies.jpg.CHIP
- %User Profile%\Sample Pictures\Water lilies.jpg.CHIPDALE
- %User Profile%\Sample Pictures\Winter.jpg.CHIP
- %User Profile%\Sample Pictures\Winter.jpg.CHIPDALE
- %User Profile%\Internet Explorer\brndlog.txt.CHIP
- %User Profile%\Internet Explorer\brndlog.txt.CHIPDALE
- %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.XML.CHIP
- %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.XML.CHIPDALE
- %User Profile%\Templates\excel.xls.CHIP
- %User Profile%\Templates\excel.xls.CHIPDALE
- %User Profile%\Templates\excel4.xls.CHIP
- %User Profile%\Templates\excel4.xls.CHIPDALE
- %User Profile%\Templates\powerpnt.ppt.CHIP
- %User Profile%\Templates\powerpnt.ppt.CHIPDALE
- %User Profile%\Templates\winword.doc.CHIP
- %User Profile%\Templates\winword.doc.CHIPDALE
- %User Profile%\Templates\winword2.doc.CHIP
- %User Profile%\Templates\winword2.doc.CHIPDALE
- %User Profile%\Cookies\wilbert@atdmt[2].txt.CHIP
- %User Profile%\Cookies\wilbert@atdmt[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@bing[2].txt.CHIP
- %User Profile%\Cookies\wilbert@bing[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt.CHIP
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@c.msn[2].txt.CHIP
- %User Profile%\Cookies\wilbert@c.msn[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@doubleclick[1].txt.CHIP
- %User Profile%\Cookies\wilbert@doubleclick[1].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@microsoft[1].txt.CHIP
- %User Profile%\Cookies\wilbert@microsoft[1].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt.CHIP
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@msn[2].txt.CHIP
- %User Profile%\Cookies\wilbert@msn[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt.CHIP
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@www.bing[2].txt.CHIP
- %User Profile%\Cookies\wilbert@www.bing[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@www.msn[1].txt.CHIP
- %User Profile%\Cookies\wilbert@www.msn[1].txt.CHIPDALE
- %User Profile%\Sample Pictures\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %User Profile%\Internet Explorer\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %Application Data%\Microsoft\Windows Media\9.0\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %User Profile%\Templates\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %User Profile%\Cookies\! Ñïåøèì íà ïîìîùü Wilbert.tXT
This report is generated via an automated analysis system.
SOLUTION
Minimum Scan Engine:
9.700
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 components
[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result. - SoundPrologik.exe
- qwin.bat
- Norton Nimnul
- pubring.pgp
- randseed.bin
- pgp.ex
- ren.bat
- FatCat
- systram.exe
- %User Temp%\FatCat.$00
- %User Temp%\FatCat.$01
- %User Temp%\FatCat.$02
- FatCat.asc
- %User Profile%\Sample Pictures\Blue hills.jpg.CHIP
- %User Profile%\Sample Pictures\Blue hills.jpg.CHIPDALE
- %User Profile%\Sample Pictures\Sunset.jpg.CHIP
- %User Profile%\Sample Pictures\Sunset.jpg.CHIPDALE
- %User Profile%\Sample Pictures\Water lilies.jpg.CHIP
- %User Profile%\Sample Pictures\Water lilies.jpg.CHIPDALE
- %User Profile%\Sample Pictures\Winter.jpg.CHIP
- %User Profile%\Sample Pictures\Winter.jpg.CHIPDALE
- %User Profile%\Internet Explorer\brndlog.txt.CHIP
- %User Profile%\Internet Explorer\brndlog.txt.CHIPDALE
- %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.XML.CHIP
- %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.XML.CHIPDALE
- %User Profile%\Templates\excel.xls.CHIP
- %User Profile%\Templates\excel.xls.CHIPDALE
- %User Profile%\Templates\excel4.xls.CHIP
- %User Profile%\Templates\excel4.xls.CHIPDALE
- %User Profile%\Templates\powerpnt.ppt.CHIP
- %User Profile%\Templates\powerpnt.ppt.CHIPDALE
- %User Profile%\Templates\winword.doc.CHIP
- %User Profile%\Templates\winword.doc.CHIPDALE
- %User Profile%\Templates\winword2.doc.CHIP
- %User Profile%\Templates\winword2.doc.CHIPDALE
- %User Profile%\Cookies\wilbert@atdmt[2].txt.CHIP
- %User Profile%\Cookies\wilbert@atdmt[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@bing[2].txt.CHIP
- %User Profile%\Cookies\wilbert@bing[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt.CHIP
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@c.msn[2].txt.CHIP
- %User Profile%\Cookies\wilbert@c.msn[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@doubleclick[1].txt.CHIP
- %User Profile%\Cookies\wilbert@doubleclick[1].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@microsoft[1].txt.CHIP
- %User Profile%\Cookies\wilbert@microsoft[1].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt.CHIP
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@msn[2].txt.CHIP
- %User Profile%\Cookies\wilbert@msn[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt.CHIP
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@www.bing[2].txt.CHIP
- %User Profile%\Cookies\wilbert@www.bing[2].txt.CHIPDALE
- %User Profile%\Cookies\wilbert@www.msn[1].txt.CHIP
- %User Profile%\Cookies\wilbert@www.msn[1].txt.CHIPDALE
- %User Profile%\Sample Pictures\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %User Profile%\Internet Explorer\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %Application Data%\Microsoft\Windows Media\9.0\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %User Profile%\Templates\! Ñïåøèì íà ïîìîùü Wilbert.tXT
- %User Profile%\Cookies\! Ñïåøèì íà ïîìîùü Wilbert.tXT
Step 3
Search and delete this folder
[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result. - %System Root%\winlogtmp
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_RANSOM.YMKJ. 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.
Step 5
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %User Profile%\Sample Pictures\Blue hills.jpg
- %User Profile%\Sample Pictures\Sunset.jpg
- %User Profile%\Sample Pictures\Water lilies.jpg
- %User Profile%\Sample Pictures\Winter.jpg
- %User Profile%\Internet Explorer\brndlog.txt
- %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.XML
- %User Profile%\Templates\excel.xls
- %User Profile%\Templates\excel4.xls
- %User Profile%\Templates\powerpnt.ppt
- %User Profile%\Templates\winword.doc
- %User Profile%\Templates\winword2.doc
- %User Profile%\Cookies\wilbert@atdmt[2].txt
- %User Profile%\Cookies\wilbert@bing[2].txt
- %User Profile%\Cookies\wilbert@c.atdmt[2].txt
- %User Profile%\Cookies\wilbert@c.msn[2].txt
- %User Profile%\Cookies\wilbert@doubleclick[1].txt
- %User Profile%\Cookies\wilbert@microsoft[1].txt
- %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt
- %User Profile%\Cookies\wilbert@msn[2].txt
- %User Profile%\Cookies\wilbert@scorecardresearch[2].txt
- %User Profile%\Cookies\wilbert@www.bing[2].txt
- %User Profile%\Cookies\wilbert@www.msn[1].txt
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