TROJ_CARBERP.YUJ

September 05, 2014
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

TrojanDownloader:Win32/Carberp.R (Microsoft); Backdoor.Win32.Symmi.rph (Kaspersky)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size:

73,728 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

03 Sep 2014

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.

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\NVIDIA Corporation

It adds the following registry entries:

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdSrv
value = "{date}"

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

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}2.146.68
  • {BLOCKED}.{BLOCKED}78.62.114
  • {BLOCKED}.{BLOCKED}8.5.4
  • {BLOCKED}.{BLOCKED}3.165.27
  • {BLOCKED}.{BLOCKED}53.145.93
  • {BLOCKED}.{BLOCKED}.16.196
  • {BLOCKED}.{BLOCKED}52.22.141
  • {BLOCKED}.{BLOCKED}.37.72
  • {BLOCKED}.{BLOCKED}53.145.10
  • {BLOCKED}.{BLOCKED}53.145.38
  • {BLOCKED}.{BLOCKED}25.69.79
  • {BLOCKED}.{BLOCKED}94.44.51
  • {BLOCKED}.{BLOCKED}94.44.49
  • {BLOCKED}.{BLOCKED}94.44.52
  • {BLOCKED}.{BLOCKED}.26.147
  • {BLOCKED}.{BLOCKED}.33.135
  • {BLOCKED}.{BLOCKED}43.144.69
  • {BLOCKED}.{BLOCKED}53.145.18
  • {BLOCKED}.{BLOCKED}53.145.51
  • {BLOCKED}.{BLOCKED}54.68.186
  • {BLOCKED}.{BLOCKED}.188.110
  • {BLOCKED}.{BLOCKED}53.145.27
  • {BLOCKED}.{BLOCKED}53.145.69
  • {BLOCKED}.{BLOCKED}.40.147
  • {BLOCKED}.{BLOCKED}.92.168
  • {BLOCKED}.{BLOCKED}53.145.75
  • {BLOCKED}.{BLOCKED}6.8.199
  • {BLOCKED}.{BLOCKED}53.145.77
  • {BLOCKED}.{BLOCKED}.37.88
  • {BLOCKED}.{BLOCKED}53.145.78
  • {BLOCKED}.{BLOCKED}2.21.31
  • {BLOCKED}.{BLOCKED}.188.126
  • {BLOCKED}.{BLOCKED}53.145.94
  • {BLOCKED}.{BLOCKED}78.40.234
  • {BLOCKED}.{BLOCKED}.92.184
  • {BLOCKED}.{BLOCKED}53.145.106
  • {BLOCKED}.{BLOCKED}.37.104
  • {BLOCKED}.{BLOCKED}.188.72
  • {BLOCKED}.{BLOCKED}4.244.136
  • {BLOCKED}.{BLOCKED}.92.152
  • {BLOCKED}.{BLOCKED}5.94.104
  • {BLOCKED}.{BLOCKED}6.8.167
  • {BLOCKED}.{BLOCKED}5.94.103
  • {BLOCKED}.{BLOCKED}.33.119
  • {BLOCKED}.{BLOCKED}5.94.105
  • {BLOCKED}.{BLOCKED}.143.230
  • {BLOCKED}.{BLOCKED}.92.136
  • {BLOCKED}.{BLOCKED}5.94.107
  • {BLOCKED}.{BLOCKED}5.94.108
  • {BLOCKED}.{BLOCKED}8.88.50

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.126.01

FIRST VSAPI PATTERN DATE:

03 Sep 2014

VSAPI OPR PATTERN File:

11.127.00

VSAPI OPR PATTERN Date:

03 Sep 2014

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software
    • NVIDIA Corporation

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_CARBERP.YUJ. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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