TROJ_CRYPAKL.A
Trojan:Win32/Dynamer!ac (Microsoft); Trojan.Zbot (Symantec); Trojan-Ransom.Win32.Cryakl.bo (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan:W32/Qhost.WE (FSecure); Trojan horse FileCryptor.MD.dropper (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
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
3,275,494 bytes
EXE
No
06 Nov 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:
- %User Temp%\$inst
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû
- %User Profile%\Application Data\TEMP
- %Program Files%\youfiles
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\ufr_reports
(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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
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\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
HKEY_CURRENT_USER\Software\Licenses
HKEY_CLASSES_ROOT\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\InprocServer32\
2.0.50727
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\NotInsertable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\Server
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\VersionIndependentProgID
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
DisplayName = "Ñóäåáíûå ïðèñòàâû 3.43.5.3"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
DisplayVersion = "3.43.5.3"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
VersionMajor = "3"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
VersionMinor = "2b"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
Publisher = "èíôîðìàöèîííûå òåõíîëîãèè"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
DisplayIcon = "%Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\Uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
UninstallString = "%Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\Uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
InstallLocation = "%Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
InstallDate = "20141023"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
Language = "419"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
EstimatedSize = "15c"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
NoModify = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ñóäåáíûå ïðèñòàâû 3.43.5.3
NoRepair = "1"
HKEY_CURRENT_USER\Software\Licenses
{R7C0DB872A3F777C0} = "{random values}"
HKEY_CURRENT_USER\Software\Licenses
{K7C0DB872A3F777C0} = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\InprocServer32
ThreadingModel = "Both"
HKEY_CURRENT_USER\Software\Licenses
{I625CA636F6BCD9F3} = "{random values}"
HKEY_CURRENT_USER\Software\Licenses
{0625CA636F6BCD9F3} = "{random values}"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = "3a98"
(Note: The default value data of the said registry entry is 3a98.)
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\Version
Dropping Routine
This Trojan drops the following files:
- %User Temp%\$inst\2.tmp
- %User Temp%\$inst\temp_0.tmp
- %User Profile%\TEMP\RAIDTest
- %Program Files%\youfiles\svchost.exe
- %User Temp%\report_23-10-2014_06-58-46-36C93087D7C30E42384D80A0A368C21E-HKFK.bin
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\ufr_reports\NO_PWDS_report_23-10-2014_06-58-46-36C93087D7C30E42384D80A0A368C21E-HKFK.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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %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
- http://whatismyip.{BLOCKED}t.org/ip
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
- Ñóäåáíûå ïðèñòàâû 3.43.5.3
- In HKEY_CURRENT_USER\Software
- Licenses
- In HKEY_CLASSES_ROOT\CLSID
- {475CC918-3199-93B9-3199-93B9319993B9}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\InprocServer32
- 2.0.50727
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
- NotInsertable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
- Server
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
- VersionIndependentProgID
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\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- DisplayName = "Ñóäåáíûå ïðèñòàâû 3.43.5.3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- DisplayVersion = "3.43.5.3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- VersionMajor = "3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- VersionMinor = "2b"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- Publisher = "èíôîðìàöèîííûå òåõíîëîãèè"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- DisplayIcon = "%Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\Uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- UninstallString = "%Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\Uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- InstallLocation = "%Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- InstallDate = "20141023"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- Language = "419"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- EstimatedSize = "15c"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- NoModify = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ñóäåáíûå ïðèñòàâû 3.43.5.3
- NoRepair = "1"
- In HKEY_CURRENT_USER\Software\Licenses
- {R7C0DB872A3F777C0} = "{random values}"
- In HKEY_CURRENT_USER\Software\Licenses
- {K7C0DB872A3F777C0} = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}\InprocServer32
- ThreadingModel = "Both"
- In HKEY_CURRENT_USER\Software\Licenses
- {I625CA636F6BCD9F3} = "{random values}"
- In HKEY_CURRENT_USER\Software\Licenses
- {0625CA636F6BCD9F3} = "{random values}"
Step 4
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
- From: TrapPollTimeMilliSecs = "3a98"
To: TrapPollTimeMilliSecs = ""3a98""
- From: TrapPollTimeMilliSecs = "3a98"
Step 5
Search and delete these components
- %User Temp%\$inst\2.tmp
- %User Temp%\$inst\temp_0.tmp
- %User Profile%\TEMP\RAIDTest
- %Program Files%\youfiles\svchost.exe
- %User Temp%\report_23-10-2014_06-58-46-36C93087D7C30E42384D80A0A368C21E-HKFK.bin
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\ufr_reports\NO_PWDS_report_23-10-2014_06-58-46-36C93087D7C30E42384D80A0A368C21E-HKFK.bin
Step 6
Search and delete these folders
- %User Temp%\$inst
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû
- %User Profile%\Application Data\TEMP
- %Program Files%\youfiles
- %Program Files%\èíôîðìàöèîííûå òåõíîëîãèè\Ñóäåáíûå ïðèñòàâû\ufr_reports
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_CRYPAKL.A. 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 8
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
Step 9
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{475CC918-3199-93B9-3199-93B9319993B9}
- Version
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