TROJ_RANSOM.YWO
Ransom:Win32/Criakl.A, TrojanSpy:Win32/Usteal.D (Microsoft); Trojan.VBS.Zapchast.bf (Kaspersky); Trojan horse Inject2.BPDM.dropper (AVG)
Windows
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
578,840 bytes
EXE
No
07 Mar 2015
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:
- %User Temp%\$inst
- %Program Files%\Ïèñüìî
- %Program Files%\Ïèñüìî\Ïèñüìî
- %Program Files%\Ïèñüìî\Ïèñüìî\ufr_reports
- %User Temp%\Adobe Flash Player
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\$inst\0.tmp
- %User Temp%\$inst\1.tmp
- %User Temp%\$inst\3.tmp
- %User Temp%\$inst\4.tmp
- %User Temp%\$inst\5.tmp
- %User Temp%\$inst\6.tmp
- %User Temp%\$inst\7.tmp
- %User Temp%\$inst\8.tmp
- %User Temp%\$inst\9.tmp
- %User Temp%\$inst\10.tmp
- %User Temp%\$inst\11.tmp
- %User Temp%\$inst\12.tmp
- %User Temp%\$inst\13.tmp
- %User Temp%\$inst\14.tmp
- %User Temp%\$inst\15.tmp
- %User Temp%\$inst\16.tmp
- %User Temp%\$inst\17.tmp
- %User Temp%\$inst\20.tmp
- %User Temp%\$inst\50.tmp
- %User Temp%\$inst\21.tmp
- %User Temp%\$inst\51.tmp
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
DisplayName = "Ïèñüìî 2015"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
DisplayVersion = "2015"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
VersionMajor = "7df"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
VersionMinor = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
Publisher = "Ïèñüìî"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
DisplayIcon = "%Program Files%\Ïèñüìî\Ïèñüìî\Uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
UninstallString = "%Program Files%\Ïèñüìî\Ïèñüìî\Uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
InstallLocation = "%Program Files%\Ïèñüìî\Ïèñüìî"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
InstallDate = "20150218"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
Language = "419"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
EstimatedSize = "186"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
NoModify = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ïèñüìî 2015
NoRepair = "1"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\$inst\2.tmp
- %User Temp%\$inst\temp_0.tmp
- %User Temp%\report_18-02-2015_03-00-55-18C44D00A79DA3D94556197977D77132-FCLG.bin
- %User Temp%\Adobe Flash Player\codec.exe
- %Program Files%\Ïèñüìî\Ïèñüìî\ufr_reports\NO_PWDS_report_18-02-2015_03-00-55-18C44D00A79DA3D94556197977D77132-FCLG.bin
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://whatismyip.{BLOCKED}i.com
- {BLOCKED}.45.26
- {BLOCKED}.129.1
This report is generated via an automated analysis system.
SOLUTION
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
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
- Ïèñüìî 2015
Step 3
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- DisplayName = "Ïèñüìî 2015"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- DisplayVersion = "2015"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- VersionMajor = "7df"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- VersionMinor = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- Publisher = "Ïèñüìî"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- DisplayIcon = "%Program Files%\Ïèñüìî\Ïèñüìî\Uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- UninstallString = "%Program Files%\Ïèñüìî\Ïèñüìî\Uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- InstallLocation = "%Program Files%\Ïèñüìî\Ïèñüìî"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- InstallDate = "20150218"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- Language = "419"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- EstimatedSize = "186"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- NoModify = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ïèñüìî 2015
- NoRepair = "1"
Step 4
Search and delete these components
- %User Temp%\$inst\2.tmp
- %User Temp%\$inst\temp_0.tmp
- %User Temp%\report_18-02-2015_03-00-55-18C44D00A79DA3D94556197977D77132-FCLG.bin
- %User Temp%\Adobe Flash Player\codec.exe
- %Program Files%\Ïèñüìî\Ïèñüìî\ufr_reports\NO_PWDS_report_18-02-2015_03-00-55-18C44D00A79DA3D94556197977D77132-FCLG.bin
Step 5
Search and delete these folders
- %User Temp%\$inst
- %Program Files%\Ïèñüìî
- %Program Files%\Ïèñüìî\Ïèñüìî
- %Program Files%\Ïèñüìî\Ïèñüìî\ufr_reports
- %User Temp%\Adobe Flash Player
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_RANSOM.YWO. 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 7
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 Temp%\$inst\0.tmp
- %User Temp%\$inst\1.tmp
- %User Temp%\$inst\3.tmp
- %User Temp%\$inst\4.tmp
- %User Temp%\$inst\5.tmp
- %User Temp%\$inst\6.tmp
- %User Temp%\$inst\7.tmp
- %User Temp%\$inst\8.tmp
- %User Temp%\$inst\9.tmp
- %User Temp%\$inst\10.tmp
- %User Temp%\$inst\11.tmp
- %User Temp%\$inst\12.tmp
- %User Temp%\$inst\13.tmp
- %User Temp%\$inst\14.tmp
- %User Temp%\$inst\15.tmp
- %User Temp%\$inst\16.tmp
- %User Temp%\$inst\17.tmp
- %User Temp%\$inst\20.tmp
- %User Temp%\$inst\50.tmp
- %User Temp%\$inst\21.tmp
- %User Temp%\$inst\51.tmp
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