TROJ_CRYPFINI.A
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
496,128 bytes
EXE
Yes
06 Jan 2016
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 drops the following copies of itself into the affected system:
- %User Profile%\CWS04_2468AD-0FD0.exe
(Note: %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.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft corporation = "%User Profile%\CWS04_2468AD-0FD0.exe"
Other System Modifications
This Trojan deletes the following files:
- %User Profile%\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma
- %User Profile%\Sample Music\New Stories (Highway Blues).wma
- %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
- %Windows%\_default.pif
- %Windows%\0.log
- %Windows%\cmsetacl.log
- %Windows%\comsetup.log
- %Windows%\DtcInstall.log
- %Windows%\FaxSetup.log
- %Windows%\iis6.log
- %Windows%\imsins.log
- %Windows%\KB893803v2.log
- %Windows%\MedCtrOC.log
- %Windows%\msgsocm.log
- %Windows%\msmqinst.log
- %Windows%\netfxocm.log
- %Windows%\ntdtcsetup.log
- %Windows%\ocgen.log
- %Windows%\ocmsn.log
- %Windows%\regopt.log
- %Windows%\sessmgr.setup.log
- %Windows%\setupact.log
- %Windows%\setupapi.log
- %Windows%\setuperr.log
- %Windows%\Sti_Trace.log
- %Windows%\tabletoc.log
- %Windows%\tsoc.log
- %Windows%\wiadebug.log
- %Windows%\wiaservc.log
- %Windows%\wmsetup.log
- %Windows%\bootstat.dat
- %Windows%\imsins.BAK
- %Windows%\clock.avi
- %Windows%\Debug\blastcln.log
- %Windows%\Debug\NetSetup.LOG
- %Windows%\Debug\UserMode\userenv.log
(Note: %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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\CryptInfinite
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
It adds the following registry entries:
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
KEYFREE = "VzwvZDt^AU"
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
KEY = "obOxLfBoXaMKwhaBQRoXMVIMaPhr`hhBYLq\lzqHcpoutU`[IMnUgb[bvECJYM^egrHXhM"
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
1 = "000000"
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
c = "23"
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
m = "59"
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
s = "59"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
1 = "%User Profile%\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
2 = "%User Profile%\Sample Music\New Stories (Highway Blues).wma"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
3 = "%User Profile%\Sample Pictures\Blue hills.jpg"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
4 = "%User Profile%\Sample Pictures\Sunset.jpg"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
5 = "%User Profile%\Sample Pictures\Water lilies.jpg"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
6 = "%User Profile%\Sample Pictures\Winter.jpg"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
7 = "%User Profile%\ntuser.dat.LOG"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
8 = "%User Profile%\NTUSER.DAT"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
9 = "%Windows%\_default.pif"
HKEY_CURRENT_USER\Software\CryptInfinite\
Info
FreeFile = "%Windows%\0.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
10 = "%Windows%\0.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
11 = "%Windows%\cmsetacl.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
12 = "%Windows%\comsetup.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
13 = "%Windows%\DtcInstall.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
14 = "%Windows%\FaxSetup.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
15 = "%Windows%\iis6.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
16 = "%Windows%\imsins.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
17 = "%Windows%\KB893803v2.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
18 = "%Windows%\MedCtrOC.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
19 = "%Windows%\msgsocm.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
20 = "%Windows%\msmqinst.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
21 = "%Windows%\netfxocm.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
22 = "%Windows%\ntdtcsetup.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
23 = "%Windows%\ocgen.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
24 = "%Windows%\ocmsn.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
25 = "%Windows%\regopt.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
26 = "%Windows%\sessmgr.setup.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
27 = "%Windows%\setupact.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
28 = "%Windows%\setupapi.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
29 = "%Windows%\setuperr.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
30 = "%Windows%\Sti_Trace.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
31 = "%Windows%\tabletoc.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
32 = "%Windows%\tsoc.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
33 = "%Windows%\wiadebug.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
34 = "%Windows%\wiaservc.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
35 = "%Windows%\WindowsUpdate.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
36 = "%Windows%\wmsetup.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
37 = "%Windows%\bootstat.dat"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
38 = "%Windows%\imsins.BAK"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
39 = "%Windows%\clock.avi"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
40 = "%Windows%\Debug\blastcln.log"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
41 = "%Windows%\Debug\NetSetup.LOG"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
42 = "%Windows%\Debug\PASSWD.LOG"
HKEY_CURRENT_USER\Software\CryptInfinite\
Files
43 = "%Windows%\Debug\UserMode\userenv.log"
Dropping Routine
This Trojan drops the following files:
- %User Profile%\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma.crinf
- %User Profile%\Sample Music\ReadDecryptFilesHere.txt
- %User Profile%\Sample Music\New Stories (Highway Blues).wma.crinf
- %User Profile%\Sample Pictures\Blue hills.jpg.crinf
- %User Profile%\Sample Pictures\ReadDecryptFilesHere.txt
- %User Profile%\Sample Pictures\Sunset.jpg.crinf
- %User Profile%\Sample Pictures\Water lilies.jpg.crinf
- %User Profile%\Sample Pictures\Winter.jpg.crinf
- %Windows%\_default.pif.crinf
- %Windows%\ReadDecryptFilesHere.txt
- %Windows%\0.log.crinf
- %Windows%\cmsetacl.log.crinf
- %Windows%\comsetup.log.crinf
- %Windows%\DtcInstall.log.crinf
- %Windows%\FaxSetup.log.crinf
- %Windows%\iis6.log.crinf
- %Windows%\imsins.log.crinf
- %Windows%\KB893803v2.log.crinf
- %Windows%\MedCtrOC.log.crinf
- %Windows%\msgsocm.log.crinf
- %Windows%\msmqinst.log.crinf
- %Windows%\netfxocm.log.crinf
- %Windows%\ntdtcsetup.log.crinf
- %Windows%\ocgen.log.crinf
- %Windows%\ocmsn.log.crinf
- %Windows%\regopt.log.crinf
- %Windows%\sessmgr.setup.log.crinf
- %Windows%\setupact.log.crinf
- %Windows%\setupapi.log.crinf
- %Windows%\setuperr.log.crinf
- %Windows%\Sti_Trace.log.crinf
- %Windows%\tabletoc.log.crinf
- %Windows%\tsoc.log.crinf
- %Windows%\wiadebug.log.crinf
- %Windows%\wiaservc.log.crinf
- %Windows%\wmsetup.log.crinf
- %Windows%\bootstat.dat.crinf
- %Windows%\imsins.BAK.crinf
- %Windows%\clock.avi.crinf
- %Windows%\Debug\blastcln.log.crinf
- %Windows%\Debug\ReadDecryptFilesHere.txt
- %Windows%\Debug\NetSetup.LOG.crinf
- %Windows%\Debug\UserMode\userenv.log.crinf
- %Windows%\Debug\UserMode\ReadDecryptFilesHere.txt
(Note: %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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
This report is generated via an automated analysis system.
SOLUTION
9.8
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
Restart in Safe Mode
Step 3
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_CURRENT_USER\Software
- CryptInfinite
- In HKEY_CURRENT_USER\Software\CryptInfinite
- Info
- In HKEY_CURRENT_USER\Software\CryptInfinite
- Files
Step 4
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Microsoft corporation = "%User Profile%\CWS04_2468AD-0FD0.exe"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- KEYFREE = "VzwvZDt^AU"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- KEY = "obOxLfBoXaMKwhaBQRoXMVIMaPhr`hhBYLq\lzqHcpoutU`[IMnUgb[bvECJYM^egrHXhM"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- 1 = "000000"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- c = "23"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- m = "59"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- s = "59"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 1 = "%User Profile%\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 2 = "%User Profile%\Sample Music\New Stories (Highway Blues).wma"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 3 = "%User Profile%\Sample Pictures\Blue hills.jpg"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 4 = "%User Profile%\Sample Pictures\Sunset.jpg"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 5 = "%User Profile%\Sample Pictures\Water lilies.jpg"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 6 = "%User Profile%\Sample Pictures\Winter.jpg"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 7 = "%User Profile%\ntuser.dat.LOG"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 8 = "%User Profile%\NTUSER.DAT"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 9 = "%Windows%\_default.pif"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Info
- FreeFile = "%Windows%\0.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 10 = "%Windows%\0.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 11 = "%Windows%\cmsetacl.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 12 = "%Windows%\comsetup.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 13 = "%Windows%\DtcInstall.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 14 = "%Windows%\FaxSetup.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 15 = "%Windows%\iis6.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 16 = "%Windows%\imsins.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 17 = "%Windows%\KB893803v2.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 18 = "%Windows%\MedCtrOC.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 19 = "%Windows%\msgsocm.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 20 = "%Windows%\msmqinst.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 21 = "%Windows%\netfxocm.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 22 = "%Windows%\ntdtcsetup.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 23 = "%Windows%\ocgen.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 24 = "%Windows%\ocmsn.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 25 = "%Windows%\regopt.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 26 = "%Windows%\sessmgr.setup.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 27 = "%Windows%\setupact.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 28 = "%Windows%\setupapi.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 29 = "%Windows%\setuperr.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 30 = "%Windows%\Sti_Trace.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 31 = "%Windows%\tabletoc.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 32 = "%Windows%\tsoc.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 33 = "%Windows%\wiadebug.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 34 = "%Windows%\wiaservc.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 35 = "%Windows%\WindowsUpdate.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 36 = "%Windows%\wmsetup.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 37 = "%Windows%\bootstat.dat"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 38 = "%Windows%\imsins.BAK"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 39 = "%Windows%\clock.avi"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 40 = "%Windows%\Debug\blastcln.log"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 41 = "%Windows%\Debug\NetSetup.LOG"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 42 = "%Windows%\Debug\PASSWD.LOG"
- In HKEY_CURRENT_USER\Software\CryptInfinite\Files
- 43 = "%Windows%\Debug\UserMode\userenv.log"
Step 5
Search and delete these components
- %User Profile%\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma.crinf
- %User Profile%\Sample Music\ReadDecryptFilesHere.txt
- %User Profile%\Sample Music\New Stories (Highway Blues).wma.crinf
- %User Profile%\Sample Pictures\Blue hills.jpg.crinf
- %User Profile%\Sample Pictures\ReadDecryptFilesHere.txt
- %User Profile%\Sample Pictures\Sunset.jpg.crinf
- %User Profile%\Sample Pictures\Water lilies.jpg.crinf
- %User Profile%\Sample Pictures\Winter.jpg.crinf
- %Windows%\_default.pif.crinf
- %Windows%\ReadDecryptFilesHere.txt
- %Windows%\0.log.crinf
- %Windows%\cmsetacl.log.crinf
- %Windows%\comsetup.log.crinf
- %Windows%\DtcInstall.log.crinf
- %Windows%\FaxSetup.log.crinf
- %Windows%\iis6.log.crinf
- %Windows%\imsins.log.crinf
- %Windows%\KB893803v2.log.crinf
- %Windows%\MedCtrOC.log.crinf
- %Windows%\msgsocm.log.crinf
- %Windows%\msmqinst.log.crinf
- %Windows%\netfxocm.log.crinf
- %Windows%\ntdtcsetup.log.crinf
- %Windows%\ocgen.log.crinf
- %Windows%\ocmsn.log.crinf
- %Windows%\regopt.log.crinf
- %Windows%\sessmgr.setup.log.crinf
- %Windows%\setupact.log.crinf
- %Windows%\setupapi.log.crinf
- %Windows%\setuperr.log.crinf
- %Windows%\Sti_Trace.log.crinf
- %Windows%\tabletoc.log.crinf
- %Windows%\tsoc.log.crinf
- %Windows%\wiadebug.log.crinf
- %Windows%\wiaservc.log.crinf
- %Windows%\wmsetup.log.crinf
- %Windows%\bootstat.dat.crinf
- %Windows%\imsins.BAK.crinf
- %Windows%\clock.avi.crinf
- %Windows%\Debug\blastcln.log.crinf
- %Windows%\Debug\ReadDecryptFilesHere.txt
- %Windows%\Debug\NetSetup.LOG.crinf
- %Windows%\Debug\UserMode\userenv.log.crinf
- %Windows%\Debug\UserMode\ReadDecryptFilesHere.txt
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_CRYPFINI.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 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 Profile%\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma
- %User Profile%\Sample Music\New Stories (Highway Blues).wma
- %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
- %Windows%\_default.pif
- %Windows%\0.log
- %Windows%\cmsetacl.log
- %Windows%\comsetup.log
- %Windows%\DtcInstall.log
- %Windows%\FaxSetup.log
- %Windows%\iis6.log
- %Windows%\imsins.log
- %Windows%\KB893803v2.log
- %Windows%\MedCtrOC.log
- %Windows%\msgsocm.log
- %Windows%\msmqinst.log
- %Windows%\netfxocm.log
- %Windows%\ntdtcsetup.log
- %Windows%\ocgen.log
- %Windows%\ocmsn.log
- %Windows%\regopt.log
- %Windows%\sessmgr.setup.log
- %Windows%\setupact.log
- %Windows%\setupapi.log
- %Windows%\setuperr.log
- %Windows%\Sti_Trace.log
- %Windows%\tabletoc.log
- %Windows%\tsoc.log
- %Windows%\wiadebug.log
- %Windows%\wiaservc.log
- %Windows%\wmsetup.log
- %Windows%\bootstat.dat
- %Windows%\imsins.BAK
- %Windows%\clock.avi
- %Windows%\Debug\blastcln.log
- %Windows%\Debug\NetSetup.LOG
- %Windows%\Debug\UserMode\userenv.log
Did this description help? Tell us how we did.