Gen.Variant.Kazy.288402_d9872a07f9

by malwarelabrobot on August 14th, 2014 in Malware Descriptions.

Susp_Dropper (Kaspersky), Gen:Variant.Kazy.288437 (B) (Emsisoft), Gen:Variant.Kazy.288402 (AdAware), Trojan-PSW.Win32.Zbot.4.FD, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan-PSW, 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: d9872a07f9990e94feab39de2fa22373
SHA1: 375a2ca5e369f46f53efd625921edda573a458f4
SHA256: 1d56c27c56154845c7931bb54fc5935f82fa51b3b3b501b43a933afa55dc9f8b
SSDeep: 6144:ZbiTBxCdEuTJComYUS/AABLYg9RtrS4KQlpW4GMQ G4kUVCAkpfJNgUuUX7Nyx3f:ZbiTBxCOUJCaTPUg9RgrQlP1Q15UV9YC
Size: 347449 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-11-08 17:42:50
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan-PSW. Trojan program intended for stealing users passwords.

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:2744
%original file name%.exe:2916
neaz.exe:2492
neaz.exe:2544

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:2916 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Ejizqy\neaz.exe (2452 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\IPM2A89.bat (173 bytes)

The process neaz.exe:2492 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\ntuser.dat.LOG (5848 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (6428 bytes)

Registry activity

The process %original file name%.exe:2744 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1D DB 77 21 D4 C8 97 88 E2 B5 F7 63 D7 B3 82 E6"

The process %original file name%.exe:2916 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "53 82 83 DE 86 51 AA 0E BD B0 06 4C FA 8F 9F 13"

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

The process neaz.exe:2492 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "17 21 E3 F8 33 36 96 6D A9 8D B6 9D 58 C3 B9 A3"

[HKCU\Software\Microsoft\Obxidaule]
"23959ic7" = "umtV2w9fmYTKG2mFQ7s CA==#"

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

The process neaz.exe:2544 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5D 4E 83 60 92 F2 3C CE 88 67 03 7E D5 83 17 26"

Dropped PE files

MD5 File path
4aac371232ead0e1b127733a6865f363 c:\Documents and Settings\"%CurrentUserName%"\Application Data\Ejizqy\neaz.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

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

HttpSendRequestExW
HttpSendRequestExA
InternetWriteFile
InternetReadFileExA
InternetReadFileExW
HttpSendRequestA
HttpSendRequestW
InternetQueryDataAvailable
HttpQueryInfoW
InternetCloseHandle
HttpQueryInfoA
InternetReadFile

The Trojan installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan installs the following user-mode hooks in USER32.dll:

GetClipboardData
TranslateMessage

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

UnsealMessage
SealMessage
DeleteSecurityContext

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

WSAGetOverlappedResult
WSASend
recv
gethostbyname
WSARecv
send
closesocket
freeaddrinfo
getaddrinfo
GetAddrInfoW

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

LdrLoadDll
NtCreateThread

Propagation

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 25944 26112 4.07267 8426a1495a62c318d53ea1f0fbaa160a
.idata 32768 3532 3584 3.54497 c40fd005544f8011a9b339cbb7c52071
.CRT 36864 4 512 0.042395 9b48522a507c88a047d33270e55b537b
.rsrc 40960 14136 36864 4.84285 f866d6cd92f982bb522009d99a2fc76e

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

No activity has been detected.

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Web Traffic was not found.

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

Explorer.EXE_1948_rwx_023F0000_00048000:

.text
`.data
.reloc
Invalid parameter passed to C runtime function.
)"4(7*</
!*< ?"4'
0123456789
userenv.dll
del "%s"
if exist "%s" goto d
del /F "%s"
hXXp://VVV.google.com/
hXXp://VVV.bing.com/
REPORT
gdiplus.dll
GdiplusShutdown
RegDeleteKeyExW
HTTP/1.1
m9.td
t.Ht$HHt
ntdll.dll
KERNEL32.dll
ExitWindowsEx
MsgWaitForMultipleObjects
GetKeyboardState
USER32.dll
CryptGetKeyParam
CryptImportKey
CryptDestroyKey
RegCreateKeyExW
RegCloseKey
RegQueryInfoKeyW
RegDeleteKeyW
RegOpenKeyExW
RegFlushKey
RegEnumKeyExW
ADVAPI32.dll
PathIsURLW
UrlUnescapeA
SHLWAPI.dll
ShellExecuteW
SHELL32.dll
Secur32.dll
ole32.dll
GDI32.dll
WS2_32.dll
PFXImportCertStore
CertDeleteCertificateFromStore
CertOpenSystemStoreW
CertCloseStore
CertEnumCertificatesInStore
CertDuplicateCertificateContext
PFXExportCertStoreEx
CRYPT32.dll
HttpSendRequestExA
HttpQueryInfoA
InternetCrackUrlA
HttpOpenRequestA
HttpEndRequestA
HttpAddRequestHeadersA
WININET.dll
OLEAUT32.dll
NETAPI32.dll
IPHLPAPI.DLL
VERSION.dll
msvcrt.dll
zcÁ
: :$:(:,:0:4:
7!7%7)7-7175797
4-5}5
:":(:3:9:
SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\%s
"%s" %s
/c "%s"
kernel32.dll
urlmon.dll
launchpadshell.exe
dirclt32.exe
wtng.exe
prologue.exe
pcsws.exe
fdmaster.exe
shell32.dll
\StringFileInfo\xx\%s
cabinet.dll
Wadvapi32.dll
%Documents and Settings%\%current user%\Application Data
%Documents and Settings%\%current user%\Local Settings\Application Data
Global\{01E22063-0823-4088-6532-C4CE7D78E7DC}


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. Scan a system with an anti-rootkit tool.
  2. Terminate malicious process(es) (How to End a Process With the Task Manager):

    %original file name%.exe:2744
    %original file name%.exe:2916
    neaz.exe:2492
    neaz.exe:2544

  3. Delete the original Trojan file.
  4. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Application Data\Ejizqy\neaz.exe (2452 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\IPM2A89.bat (173 bytes)
    %Documents and Settings%\%current user%\ntuser.dat.LOG (5848 bytes)
    %Documents and Settings%\%current user%\NTUSER.DAT (6428 bytes)

  5. Reboot the computer.

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

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