Gen.Variant.Gamarue.1_5346d821fc – Adaware

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Gamarue.1 (B) (Emsisoft), Gen:Variant.Gamarue.1 (AdAware), Trojan-Downloader.Win32.Andromeda.FD, TrojanDownloaderAndromeda.YR (Lavasoft MAS)Behaviour: Trojan-Downloader, Trojan

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

Summary

MD5: 5346d821fc6ae49b12b13014dbb6721b

SHA1: 94606e9f829a84c236d91c9981745ff4853ed63f

SHA256: bf22ad9320a8573189df046a04a61bc4f2190e30a826ad6bc789a2f22d35565f

SSDeep: 3072:golhK8sqT6MM6MMMMMMMMM2kxYJ ipeq1u4oTsZlgghZ SlnopAqcKzkAwLNe54s:gondu4ogr7 KopAqc68Hvsl

Size: 160256 bytes

File type: EXE

Platform: WIN32

Entropy: Packed

PEID: BorlandDelphi30, UPolyXv05_v6

Company: no certificate found

Created at: 2013-01-09 15:05:27

Analyzed on: WindowsXP SP3 32-bit

Summary: Trojan-Downloader. Trojan program, which downloads files from the Internet without user's notice and executes them.

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

~msiexec.exe:920
%original file name%.exe:388
%original file name%.exe:1256

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

~msiexec.exe:1540

Mutexes

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

File activity

The process ~msiexec.exe:1540 makes changes in the file system.

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

%Documents and Settings%\All Users\svchost.exe (37 bytes)

The process %original file name%.exe:1256 makes changes in the file system.

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

%Documents and Settings%\%current user%\Local Settings\Temp\$MSI\~msiexec.exe (37 bytes)

Registry activity

The process ~msiexec.exe:920 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "6C 49 13 40 63 6D 8B 63 89 3D A8 10 71 F9 B6 0D"

The process ~msiexec.exe:1540 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "93 7E 82 6E 5A 76 30 62 40 F1 9A 6D D7 D3 3A 84"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"SunJavaUpdateSched" = "%Documents and Settings%\All Users\svchost.exe"

The process %original file name%.exe:388 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "15 74 9C FD 4B FF E7 5E 54 F4 FF 7B FC 6C 48 71"

The process %original file name%.exe:1256 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "86 E3 55 2C C0 96 44 02 BC 99 0A 05 0A 9E 6F A8"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft]
"0022FF03" = "50 4B 03 04 00 A6 01 00 50 A4 00 00 85 D4 21 99"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\$MSI]
"~msiexec.exe" = "CRC CheckSum Fixer"

[HKCU\Software]
"e_magic" = "3C 2B E1 71 72 71 71 71 75 71 71 71 8E 8E 71 71"

The Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

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

The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

"IntranetName" = "1"

The Trojan modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

"UNCAsIntranet" = "1"

Dropped PE files

MD5	File path
059eef29b2311d2e933d3b68b6f57b9b	c:\Documents and Settings\All Users\svchost.exe
059eef29b2311d2e933d3b68b6f57b9b	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\$MSI\~msiexec.exe

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):
~msiexec.exe:920
%original file name%.exe:388
%original file name%.exe:1256
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\All Users\svchost.exe (37 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\$MSI\~msiexec.exe (37 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"SunJavaUpdateSched" = "%Documents and Settings%\All Users\svchost.exe"
Reboot the computer.

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

Static Analysis

VersionInfo

Company Name: Divine
Product Name: Divine CRC CheckSum Fixer
Product Version: 1, 0, 1, 1
Legal Copyright: Copyright Divine(c) 2012
Legal Trademarks: Divine(c)
Original Filename: CheckSum Fixer.exe
Internal Name: CheckSum Fixer
File Version: 1, 0, 0, 1
File Description: CRC CheckSum Fixer
Comments:
Language: English (United States)

Company Name: Divine Product Name: Divine CRC CheckSum FixerProduct Version: 1, 0, 1, 1Legal Copyright: Copyright Divine(c) 2012Legal Trademarks: Divine(c)Original Filename: CheckSum Fixer.exeInternal Name: CheckSum FixerFile Version: 1, 0, 0, 1File Description: CRC CheckSum FixerComments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	10792	11264	3.9388	51f6ada4502705b312cd1609d63b6338
.rdata	16384	500	512	3.01276	eab83db1c5019007973bb19b7eb2d050
.data	20480	2677	512	0.339243	c5235e929468030e2ffb3160cb3092a3
.rsrc	24576	146880	146944	5.39774	b8232333c4695ef72759f9c68ceec5e5

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
b581542057cdbdfc422ee0b0e2b1be6b

Network Activity

URLs

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

~msiexec.exe_1540:

.text

hdll.hsbie

h.dllhpi32hadva

.PFoE/3

,1.Vd^

UPec.Sk"

_[.HRa

t.erx

kernel32.dll

~msiexec.exe_1540_rwx_00330000_00002000:

%ALLUSERSPROFILE%\svchost.exe

SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Software\Microsoft\Windows\CurrentVersion\Run

cmd.exe

ntdll.dll

GetProcessHeap

kernel32.dll

ws2_32.dll

RegCloseKey

RegOpenKeyExA

advapi32.dll

~msiexec.exe_1540_rwx_00400000_00005000:

.text

hdll.hsbie

h.dllhpi32hadva

.PFoE/3

,1.Vd^

UPec.Sk"

_[.HRa

t.erx

kernel32.dll