TROJ_CARBERP.ERO

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:

• MD7H82HHF7EH2D73

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\NVIDIA Corporation\
Global\nvUpdSrv

It adds the following registry entries:

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdSrv
value = {ininitally the installed version of malware which is "12140920"}

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdSrv
GUID = {GUID}

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

• {BLOCKED}.{BLOCKED}.180.16:32136
• {BLOCKED}.{BLOCKED}.119.253:18625
• {BLOCKED}.{BLOCKED}.103.78:36034
• {BLOCKED}.{BLOCKED}.211.42:58264
• {BLOCKED}.{BLOCKED}.9.198:29296
• {BLOCKED}.{BLOCKED}.137.9:51340
• {BLOCKED}.{BLOCKED}.160.220:49878
• {BLOCKED}.{BLOCKED}.138.236:46116
• {BLOCKED}.{BLOCKED}.116.234:35621
• {BLOCKED}.{BLOCKED}.219.16:49976
• {BLOCKED}.{BLOCKED}.97.247:30577
• {BLOCKED}.{BLOCKED}.143.244:48775
• {BLOCKED}.{BLOCKED}.186.250:16193
• {BLOCKED}.{BLOCKED}.62.4:16660
• {BLOCKED}.{BLOCKED}.175.20:49105
• {BLOCKED}.{BLOCKED}.42.114:18397
• {BLOCKED}.{BLOCKED}.72.1:19919
• {BLOCKED}.{BLOCKED}.223.18:22740
• {BLOCKED}.{BLOCKED}.92.3:53109
• {BLOCKED}.{BLOCKED}.227.173:19592
• {BLOCKED}.{BLOCKED}.72.235:49719
• {BLOCKED}.{BLOCKED}.227.1:29071
• {BLOCKED}.{BLOCKED}.233.149:35173
• {BLOCKED}.{BLOCKED}.250.108:19004
• {BLOCKED}.{BLOCKED}.192.206:41023
• {BLOCKED}.{BLOCKED}.171.130:13586
• {BLOCKED}.{BLOCKED}.76.42:29178
• {BLOCKED}.{BLOCKED}.1.10:49891
• {BLOCKED}.{BLOCKED}.4.190:19413
• {BLOCKED}.{BLOCKED}.148.126:58046
• {BLOCKED}.{BLOCKED}.51.32:33008
• {BLOCKED}.{BLOCKED}.84.52:12825
• {BLOCKED}.{BLOCKED}.82.43:51515
• {BLOCKED}.{BLOCKED}.243.115:25603
• {BLOCKED}.{BLOCKED}.211.203:32872
• {BLOCKED}.{BLOCKED}.48.190:61307
• {BLOCKED}.{BLOCKED}.145.14:37470
• {BLOCKED}.{BLOCKED}.119.254:38354
• {BLOCKED}.{BLOCKED}.73.170:27174
• {BLOCKED}.{BLOCKED}.94.2:11754
• {BLOCKED}.{BLOCKED}.11.115:15396
• {BLOCKED}.{BLOCKED}.215.209:15551
• {BLOCKED}.{BLOCKED}.149.150:62059
• {BLOCKED}.{BLOCKED}.26.250:19285
• {BLOCKED}.{BLOCKED}.155.156:30111
• {BLOCKED}.{BLOCKED}.151.187:39179
• {BLOCKED}.{BLOCKED}.9.199:25127
• {BLOCKED}.{BLOCKED}.82.41:21999
• {BLOCKED}.{BLOCKED}.58.68:23480
• {BLOCKED}.{BLOCKED}.38.236:28654
• {BLOCKED}.{BLOCKED}.88.50:61107
• {BLOCKED}.{BLOCKED}.104.204:60098
• {BLOCKED}.{BLOCKED}.153.26:51982
• {BLOCKED}.{BLOCKED}.139.225:26545
• {BLOCKED}.{BLOCKED}.148.25:10925
• {BLOCKED}.{BLOCKED}.32.138:10315
• {BLOCKED}.{BLOCKED}.126.77:33918
• {BLOCKED}.{BLOCKED}.179.119:64167
• {BLOCKED}.{BLOCKED}.2.42:31710
• {BLOCKED}.{BLOCKED}.117.15:39361
• {BLOCKED}.{BLOCKED}.145.233:54275
• {BLOCKED}.{BLOCKED}.144.4:33816
• {BLOCKED}.{BLOCKED}.48.52:41628
• {BLOCKED}.{BLOCKED}.255.157:10238
• {BLOCKED}.{BLOCKED}.250.34:33906
• {BLOCKED}.BLOCKED}.162.167:25833
• {BLOCKED}.{BLOCKED}.10.10:47298
• {BLOCKED}.{BLOCKED}.248.42:36427
• {BLOCKED}.{BLOCKED}.139.127:58914
• {BLOCKED}.{BLOCKED}.223.12:49116
• {BLOCKED}.{BLOCKED}.128.22:12898
• {BLOCKED}.{BLOCKED}.205.159:51633
• {BLOCKED}.{BLOCKED}.65.70:48741
• {BLOCKED}.{BLOCKED}.86.17:42737
• {BLOCKED}.{BLOCKED}.30.17:36991
• {BLOCKED}.{BLOCKED}.36.253:35367
• {BLOCKED}.{BLOCKED}.195.163:44937
• {BLOCKED}.{BLOCKED}.118.200:31973
• {BLOCKED}.{BLOCKED}.227.159:27247
• {BLOCKED}.{BLOCKED}.96.17:16107
• {BLOCKED}.{BLOCKED}.224.67:40259
• {BLOCKED}.{BLOCKED}.146.9:26084
• {BLOCKED}.{BLOCKED}.4.167:13737
• {BLOCKED}.{BLOCKED}.113.172:48166
• {BLOCKED}.{BLOCKED}.165.113:30007
• {BLOCKED}.{BLOCKED}.137.179:17653
• {BLOCKED}.{BLOCKED}.140.57:22512
• {BLOCKED}.{BLOCKED}.197.36:31571
• {BLOCKED}.{BLOCKED}.50.2:54663
• {BLOCKED}.{BLOCKED}.0.237:33097
• {BLOCKED}.{BLOCKED}.102.111:46975
• {BLOCKED}.{BLOCKED}.43.92:41780
• {BLOCKED}.{BLOCKED}.190.54:26630
• {BLOCKED}.{BLOCKED}.70.40:17896
• {BLOCKED}.{BLOCKED}.143.129:21583
• {BLOCKED}.{BLOCKED}.126.61:60541
• {BLOCKED}.{BLOCKED}.0.216:37288
• {BLOCKED}.{BLOCKED}.152.141:31643
• {BLOCKED}.{BLOCKED}.118.230:49649
• {BLOCKED}.{BLOCKED}.107.132:19796
• {BLOCKED}.{BLOCKED}.140.51:16549

  It saves the files it downloads using the following names:

  • %User Temp%\nvu{random}.tmp.exe - it executes this file

  (Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

  NOTES:
  

  It notifies IP address mentioned above by sending the following HTTP GET request, and then waits for further acknowledgement before downloading.

  • stat?uid={value}&downlink={value}&uplink={value}&id={value}&statpass={value}&version={installed version}&features={value}&guid={guid}&comment={value}&p={value}&s={value}

  However, as of this writing this request attempts fails.

  It can also receive information on the connection and can update the value on the following registry:

  HKEY_CURRENT_USER\Software\NVIDIA Corporation\Global\nvUpdSr
  value = {value}

  It can also receive other information where it can also connect to other than the mentioned IP addresses above. It may also download into this new connections.

  It does not have rootkit capabilities.

  It does not exploit any vulnerability.