Method of Infection
When executed, Reign.R creates the following directory:
%Windows%\tgbcde\
It copies itself to this directory as module32.exe and removes the original executable.
Reign.R also drops a DLL file to this directory as library32.dll.
Note: '%Windows%' is a variable location. The trojan determines the location of the current Windows folder by querying the operating system. The default installation location for the Windows directory for Windows 2000 and NT is C:\Winnt; for 95,98 and ME is C:\Windows; and for XP is C:\Windows.
Reign.R makes several modifications to the registry. It creates the following registry key and sets the value to the time when Reign initially loaded:
HKCU\Software\Microsoft\Windows\CurrentVersion\tgbcde
It also sets the following registry run key so that module32.exe is executed each time Windows is started:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\tgbcde = "%Windows%\tgbcde\module32.exe arg1"
Reign also tries to register itself as a service process.
Note: The Reign.R DLL (library32.dll) hides any file or registry key containg the string 'tgbcde'; hence affected users will not be able to see files created by Reign using Windows folders or Explorer. Reign also hides its own process on the affected machine.
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Payload
Keylogging/Stealing Sensitive Information
On Windows 9x/ME systems Reign tries to gather cached passwords using WNetEnumCachedPasswords API.
It also copies the user's mail settings to %Windows%\tgbcde\~tmp636; this information includes the user's e-mail address, mail server, username and password.
Reign logs usernames and passwords for both the online currency sites, 'egold' and 'evocash' to the following files:
%Windows%\tgbcde\egold.pst
%Windows%\tgbcde\evocash.pst
Additionally Reign logs the user's keystrokes to %Windows%\tgbcde\kbd.txt and records URLs visited by the user and Web requests made by the user to these files:
%Windows%\tgbcde\htm.txt
%Windows%\tgbcde\req.txt
Every 12 hours Reign uploads all of these files to an FTP server and then removes them from the user's system.
Terminates Processes
Reign.R terminates the following processes (associated with antivirus and other security-related applications):
ACKWIN32.EXE
ANTI-TROJAN.EXE
APVXDWIN.EXE
AUTODOWN.EXE
AVCONSOL.EXE
AVE32.EXE
AVGCTRL.EXE
AVKSERV.EXE
AVNT.EXE
AVP.EXE
AVP32.EXE
AVPCC.EXE
AVPDOS32.EXE
AVPM.EXE
AVPTC32.EXE
AVPUPD.EXE
AVSCHED32.EXE
AVWIN95.EXE
AVWUPD32.EXE
BLACKD.EXE
BLACKICE.EXE
CFIADMIN.EXE
CFIAUDIT.EXE
CFINET.EXE
CFINET32.EXE
CLAW95.EXE
CLAW95CF.EXE
CLEANER.EXE
CLEANER3.EXE
DVP95.EXE
DVP95_0.EXE
ECENGINE.EXE
ESAFE.EXE
ESPWATCH.EXE
F-AGNT95.EXE
F-PROT.EXE
F-PROT95.EXE
F-STOPW.EXE
FINDVIRU.EXE
FP-WIN.EXE
FPROT.EXE
FRW.EXE
IAMAPP.EXE
IAMSERV.EXE
IBMASN.EXE
IBMAVSP.EXE
ICLOAD95.EXE
ICLOADNT.EXE
ICMON.EXE
ICSUPP95.EXE
ICSUPPNT.EXE
IFACE.EXE
IOMON98.EXE
JEDI.EXE
LOCKDOWN2000.EXE
LOOKOUT.EXE
LUALL.EXE
MOOLIVE.EXE
MPFTRAY.EXE
N32SCANW.EXE
NAVAPW32.EXE
NAVLU32.EXE
NAVNT.EXE
NAVW32.EXE
NAVWNT.EXE
NISUM.EXE
NMAIN.EXE
NORMIST.EXE
NUPGRADE.EXE
NVC95.EXE
OUTPOST.EXE
PADMIN.EXE
PAVCL.EXE
PAVSCHED.EXE
PAVW.EXE
PCCWIN98.EXE
PCFWALLICON.EXE
PERSFW.EXE
RAV7.EXE
RAV7WIN.EXE
RESCUE.EXE
SAFEWEB.EXE
SCAN32.EXE
SCAN95.EXE
SCANPM.EXE
SCRSCAN.EXE
SERV95.EXE
SMC.EXE
SPHINX.EXE
SWEEP95.EXE
TBSCAN.EXE
TCA.EXE
TDS2-98.EXE
TDS2-NT.EXE
VET95.EXE
VETTRAY.EXE
VSCAN40.EXE
VSECOMR.EXE
VSHWIN32.EXE
VSSTAT.EXE
WEBSCANX.EXE
WFINDV32.EXE
ZONEALARM.EXE
_AVP32.EXE
_AVPCC.EXE
_AVPM.EXE
Analysis by Paul Taylor
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