Gen.Variant.Kazy.303727_029173387d – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:2508
KB00904859.exe:2784

The Trojan injects its code into the following process(es):

Explorer.EXE:1948

Mutexes

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

File activity

The process %original file name%.exe:2508 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\KB00904859.exe (673 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\expB2.tmp.bat (190 bytes)

Registry activity

The process %original file name%.exe:2508 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

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

The process KB00904859.exe:2784 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

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

Dropped PE files

There are no dropped PE files.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

The Trojan installs the following user-mode hooks in Secur32.dll:

InitializeSecurityContextA
UnsealMessage
SealMessage
InitializeSecurityContextW
DeleteSecurityContext

The Trojan installs the following user-mode hooks in WS2_32.dll:

WSASend
recv
WSARecv
send
connect
closesocket

The Trojan installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtResumeThread

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*

Scan a system with an anti-rootkit tool.
Terminate malicious process(es) (How to End a Process With the Task Manager):
%original file name%.exe:2508
KB00904859.exe:2784
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Application Data\KB00904859.exe (673 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\expB2.tmp.bat (190 bytes)
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: Bikmd Vlrip
Product Name: Frwcrzo Anvy Dhmvu
Product Version: 7.18.6938.33642
Legal Copyright: Copyright (c) Bikmd Vlrip
Legal Trademarks:
Original Filename: Frwcrzo.exe
Internal Name: Frwcrzo
File Version: 7.18.6938.33642
File Description: Frwcrzo Zdmuiy Ixryhga Mmgyx
Comments:
Language: English (United States)

Company Name: Bikmd VlripProduct Name: Frwcrzo Anvy DhmvuProduct Version: 7.18.6938.33642Legal Copyright: Copyright (c) Bikmd VlripLegal Trademarks: Original Filename: Frwcrzo.exeInternal Name: FrwcrzoFile Version: 7.18.6938.33642File Description: Frwcrzo Zdmuiy Ixryhga MmgyxComments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	6977	7168	3.81754	3191a7afbe60661d936939dee4f5a89f
.data	12288	3980	4096	1.71621	2d439ced00b2635c75ac19a3582b1656
.reloc	16384	1980	2048	4.60219	008f6c7ef86370b0b50896b80f83290c
.rsrc	20480	19954	19968	4.10747	fb9cefe9c359d77528cc26a0265a68f6
.rdata	40960	99953	100352	3.38058	833aff0323be49e359bf036749d2a711

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://31.31.204.59/bgb8LDA/pPyyx/yLrJeD/
hxxp://masterupdate.ru/bgb8LDA/pPyyx/yLrJeD/	31.31.204.59
hxxp://updatecheck.co.ua/bgb8LDA/pPyyx/yLrJeD/

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

POST /bgb8LDA/pPyyx/yLrJeD/ HTTP/1.1

Accept: */*

User-Agent: Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0; en-US)

Host: masterupdate.ru

Content-Length: 335

Connection: Keep-Alive

Cache-Control: no-cache

..>u*.T.........D.....3..kiW.(s..V.:n..8(R."-Z..J..F../..]..@[|.. ..W1.U...?y..F}..|...*D&..[.....BX.k.,

lo......9p..C...z.T....(.w.D.t....z...$...f.dM.#....0b.Al|.h..b..;CC.e"..p#...!......Ex.d...5..!.2y.1..^&O.I..:.D..<A,... V.*..p....D./..R..d V./K.Nk.J... ...3cf}

..7^p....VT....:-.._7..q.....{... ...#.....i..x..y..PQ..?....j

HTTP/1.1 404 Not Found

Server: nginx

Date: Wed, 29 Oct 2014 15:41:12 GMT

Content-Type: text/html

Transfer-Encoding: chunked

Connection: keep-alive

234..<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx</center>..</body>..</html>..............0..

POST /bgb8LDA/pPyyx/yLrJeD/ HTTP/1.1

Accept: */*

User-Agent: Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0; en-US)

Host: updatecheck.co.ua

Content-Length: 335

Connection: Keep-Alive

Cache-Control: no-cache

yS.D.....PC..;.*...L.?...0q......C.j..hq.>r........_wPds..?u.^.....L.H.*..1..?..0.1..*.X....V...RT...E..te....@....~y...........(.w.D.t....z...$..G..l:...Y..O.D...,QO.a.g.U...gk...O...iA.....gIU/!%M.=z.|/.W.~.-X..I.......^.y... U%Q.....u...p\n...K.. .'...5......g(...h:...U@hs...:.H..r...E. k..j..ZM....L.......-Y.}o.S....@......c0

HTTP/1.1 404 Not Found

Server: nginx

Date: Wed, 29 Oct 2014 15:41:12 GMT

Content-Type: text/html

Transfer-Encoding: chunked

Connection: keep-alive

234..<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx</center>..</body>..</html>..............0..

Map

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

Strings from Dumps

Explorer.EXE_1948_rwx_01100000_00019000:

.text

`.rdata

@.data

.reloc

SSSShTP

application/x-www-form-urlencoded

]]>

%u

]]>

%%.%us%%u%%u%%u

httpshots

httpinjects

%u.%u.%u.%u:%u

crypt32.dll

del /F /Q /A "%S"

if exist "%S" goto R

HTTP/1.0

HTTP/1.1

https

httpinject

HTTP/1.1 200 OK

[%S]

%S

Content-Disposition: attachment; filename=%S

cabinet.dll

nss3.dll

ssl3.dll

nspr4.dll

wininet.dll

ws2_32.dll

secur32.dll

kernel32.dll

ntdll.dll

SSL_ImportFD

InternetCrackUrlW

HttpSendRequestExW

HttpQueryInfoA

HttpOpenRequestW

HttpEndRequestW

CryptImportPublicKeyInfo

CertDeleteCertificateFromStore

CertDuplicateCertificateContext

CertEnumCertificatesInStore

CertCloseStore

PFXExportCertStoreEx

CertOpenSystemStoreW

PFXImportCertStore

SHLWAPI.dll

CreatePipe

GetProcessHeap

KERNEL32.dll

CryptExportKey

CryptGenKey

CryptDestroyKey

RegCreateKeyExW

RegOpenKeyExW

RegNotifyChangeKeyValue

RegCloseKey

ADVAPI32.dll

SHELL32.dll

|.^$* ?()[\

4H4d4y4

2"2D2U2

8094989

Software\Microsoft\Windows NT\CX

Mozilla\Firefox\Profiles

chrome.exe

firefox.exe

explorer.exe

Local\XMEX

Local\XMMX

Local\XMIX

NSoftware\Microsoft\Windows\CurrentVersion\Run

ShXXp://renataltd.ru

hXXp://montierco.ru

hXXp://pianiykrolik.ru

hXXp://masterupdate.ru

hXXp://updatecheck.co.ua

Local\XMSX

Local\XMFX

Local\XMRX

Software\Microsoft\Windows NT\SX

sKBd.exe

Local\XMQX

Local\XMBX

"%s" /c "%s"

/c "%s"

Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0; en-US)

Software\Microsoft\Windows NT\CECEA88B2

%WinDir%\Explorer.EXE

%Documents and Settings%\%current user%\Application Data\EA8B7786\EA8B7786.srv

%Documents and Settings%\%current user%\Application Data\EA8B7786\EA8B7786

%Documents and Settings%\%current user%\Application Data\EA8B7786

Software\Microsoft\Windows NT\SEA8B7786

%Documents and Settings%\%current user%\Application Data\KB00904859.exe

%Documents and Settings%\%current user%\Application Data

KB00904859.exe

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps