FakeAV.Win32.FakeRean_27a040a6df – Adaware

Susp_Dropper (Kaspersky), Gen:Variant.Katusha.5 (B) (Emsisoft), Fake-AV.Win32.FakeRean.2.FD, FakeAVWin32FakeRean.YR (Lavasoft MAS)Behaviour: Fake-AV

The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary

MD5: 27a040a6df0453f2b13fccc082866ce7

SHA1: b10d1f846d3fa01174d18aa2d7e2d9531e367651

SHA256: 5aea25ab3e82b5ccd25e158f1cec3341d2233d9740e376bb094e3666218ed614

SSDeep: 6144:/8j10N2aQAfjzPAU10LoFC3hOyfWuySf3O7tpyF9T:ye8aQIjrrlFC3hOksSW

Size: 344064 bytes

File type: EXE

Platform: WIN32

Entropy: Packed

PEID: MicrosoftVisualCv71EXE, UPolyXv05_v6

Company: no certificate found

Created at: 2001-12-20 00:03:24

Analyzed on: WindowsXP SP3 32-bit

Summary: Fake-AV. FakeAV programs generate exaggerated threat reports on the compromised computer then ask the user to purchase a registered version to remove those reported threats.

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Fake-AV creates the following process(es):

%original file name%.exe:148

The Fake-AV injects its code into the following process(es):

jkq.exe:2016

Mutexes

The following mutexes were created/opened:No objects were found.

File activity

The process %original file name%.exe:148 makes changes in the file system.

The Fake-AV creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe (1625 bytes)

The process jkq.exe:2016 makes changes in the file system.

The Fake-AV creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Templates\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
%Documents and Settings%\%current user%\Local Settings\Application Data\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
%Documents and Settings%\All Users\Application Data\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
%System%\wbem\Logs\wbemprox.log (304 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)

The Fake-AV deletes the following file(s):

C:\%original file name%.exe (0 bytes)

Registry activity

The process %original file name%.exe:148 makes changes in the system registry.

The Fake-AV creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "45 CE 97 69 A5 68 41 0A 26 7B F0 82 55 B1 4F CF"

[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusOverride" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile]
"DisableNotifications" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Templates" = "%Documents and Settings%\%current user%\Templates"

[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallDisableNotify" = "1"
"UpdatesDisableNotify" = "1"
"FirewallOverride" = "1"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile]
"EnableFirewall" = "0"

"DoNotAllowExceptions" = "0"

Antivirus notifications are disabled:

[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusDisableNotify" = "1"

A firewall is disabled:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"EnableFirewall" = "0"

The following service is disabled:

[HKLM\System\CurrentControlSet\Services\SharedAccess]
"Start" = "4"

Firewall notifications are disabled:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DisableNotifications" = "1"

The process jkq.exe:2016 makes changes in the system registry.

The Fake-AV creates and/or sets the following values in system registry:

[HKCU\Software\Classes\exefile\shell\open\command]
"(Default)" = "%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe -a %1 %*"

[HKCU\Software\Classes\exefile\shell\runas\command]
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Classes\exefile]
"(Default)" = "Application"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Clients\StartMenuInternet]
"(Default)" = "IEXPLORE.EXE"

[HKCU\Software\Classes\exefile\shell\open\command]
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Templates" = "%Documents and Settings%\%current user%\Templates"

[HKCU\Software\Classes\exefile\shell\runas\command]
"(Default)" = "%1 %*"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKCU\Software\Classes\.exe\shell\open\command]
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Classes\exefile\DefaultIcon]
"(Default)" = "%1"

[HKCU\Software\Classes\.exe]
"(Default)" = "exefile"

[HKLM\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command]
"(Default)" = "%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe -a %Program Files%\Internet Explorer\iexplore.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[HKCU\Software\Classes\exefile]
"Content Type" = "application/x-msdownload"

[HKCU\Software\Classes\.exe\shell\runas\command]
"(Default)" = "%1 %*"
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Microsoft\Windows]
"Identity" = "2586641616"

[HKCU\Software\Classes\.exe\shell\open\command]
"(Default)" = "%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe -a %1 %*"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "23 91 F0 98 C4 7F FC 51 B5 F0 1B 3C 84 EE 93 1B"

[HKCU\Software\Classes\.exe\DefaultIcon]
"(Default)" = "%1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[HKCU\Software\Classes\.exe]
"Content Type" = "application/x-msdownload"

To automatically run itself each time Windows is booted, the Fake-AV adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"ctfmon.exe" = "%System%\ctfmon.exe"

"3434139137" = "%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe"

Dropped PE files

There are no dropped PE files.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

Remove it with Ad-Aware

Click (here) to download and install Ad-Aware Free Antivirus.
Update the definition files.
Run a full scan of your computer.

Manual removal*

Terminate malicious process(es) (How to End a Process With the Task Manager):
%original file name%.exe:148
Delete the original Fake-AV file.
Delete or disinfect the following files created/modified by the Fake-AV:
%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe (1625 bytes)
%Documents and Settings%\%current user%\Templates\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
%Documents and Settings%\%current user%\Local Settings\Application Data\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
%Documents and Settings%\All Users\Application Data\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
%System%\wbem\Logs\wbemprox.log (304 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\ty0b4s21gdx810506y4j1a4k5h45l771685a4 (216 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"ctfmon.exe" = "%System%\ctfmon.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"3434139137" = "%Documents and Settings%\%current user%\Local Settings\Application Data\jkq.exe"
Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

VersionInfo

Company Name: Microsoft Corporation
Product Name: Microsoft (R) Windows Script Host
Product Version: 5.7.0.18066
Legal Copyright: Copyright (C) Microsoft Corp. 1996-2006, All Rights Reserved
Legal Trademarks:
Original Filename: cscript.exe
Internal Name: cscript.exe
File Version: 5.7.0.18066
File Description: Microsoft (R) Console Based Script Host
Comments:
Language: Language Neutral

Company Name: Microsoft CorporationProduct Name: Microsoft (R) Windows Script HostProduct Version: 5.7.0.18066Legal Copyright: Copyright (C) Microsoft Corp. 1996-2006, All Rights ReservedLegal Trademarks: Original Filename: cscript.exeInternal Name: cscript.exeFile Version: 5.7.0.18066File Description: Microsoft (R) Console Based Script HostComments: Language: Language Neutral

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	65536	65536	4.25929	f3ba920816fcb88964ebe60d8824f353
.rdata	69632	118784	118784	5.21794	e228139fb2022a9e9a802033f2defdc0
.data	188416	1798144	114688	5.26155	a017ec8f406bfbbe313d58a81a95f533
.idata	1986560	8192	8192	3.54757	3e5ec270a8313e804db88874da61943b
.rsrc	1994752	32768	32768	2.92801	1a468c26bee20cf1079e4acb99a3d219

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
microsoft.com

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

The Fake-AV connects to the servers at the folowing location(s):

Strings from Dumps

jkq.exe_2016_rwx_00401000_001E4000:

hwq.CY

)%xru7

d%DY1*

(7),01444

'9=82<.342>

IEC hXXp://VVV.iec.ch

.IEC 61966-2.1 Default RGB colour space - sRGB

CRT curv

.IDATx

HTTP/1.0 200 OK

Date: %s

Expires: %s

Content-Type: %s

0000000000000

J-2}i

qM$.ve&

:T-e}h

`@?-O}e%

gdiplus.dll

user32.dll

wsock32.dll

ws2_32.dll

oleaut32.dll

gdi32.dll

advapi32.dll

uxtheme.dll

ole32.dll

shell32.dll

comctl32.dll

shlwapi.dll

version.dll

msimg32.dll

ntdll.dll

kernel32.dll

Software\Microsoft\Windows\CurrentVersion\Run

microsoft.com

Software\Microsoft\Windows

hXXp://

SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

IEXPLORE.EXE

FIREFOX.EXE

%System%\ctfmon.exe

ctfmon.exe

%s\shell\%s\command

%s, %.2i %s %.4i %.2i:%.2i:%.2i GMT

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)

HTTP/1.0

Windows Defender

HTTP/1.

PSSh)

PSShQ

PSShu

SSSSSSh

SSSSh

%Program Files%\Internet Explorer\iexplore.exe

C:\Perl\lib\TAP\Parser\

ernet Files\Content.IE5\KP27CLYF\

4531-1003\

h1 { color: #4465A2; font-size: 1.1em; font-weight: normal; vertical-align:bottom; margin-top: 7px; margin-bottom: 4px; }h2 { font-size: 0.9em; font-weight: normal; margin-top: 20px; margin-bottom: 1px; }h3 { font-size: 0.9em; font-weight: normal; margin-top: 10px; margin-bottom: 1px; }h4 { font-size: 0.9em; font-weight: normal; margin-top: 12px; margin-bottom: 1px; }.b { vertical-align: middle; margin-top: %MF%px; margin-right: 6px; }ul, ol { font-size: 0.9em; list-style-position: outside; margin-top: 1px; margin-bottom: 1px; padding-top: 1px; padding-bottom: 1px; line-height: 1.3em; }

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