TROJ_BANLOAD.YWNFW

May 12, 2015
 ALIASES:

TrojanDownloader:Win32/Banload.BAJ (Microsoft); Trojan.Gen.2 (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Banload2.ZZC (AVG)

 PLATFORM:

Windows

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

  • 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:

823,808 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

12 May 2015

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 creates the following folders:

  • %User Profile%\Application Data\suyhkdmjvrdltpv

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\fgiusji

It adds the following registry entries:

HKEY_CURRENT_USER\Software\fgiusji
nm10 = "0306"

HKEY_CURRENT_USER\Software\fgiusji
nm13 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm15 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm16 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm17 = "594445400B1E1E5F5F465F435E5E595F421E525F5D1F52421E5143404558465E1F525E5F5A59541F444944"

HKEY_CURRENT_USER\Software\fgiusji
nm2 = "424548585A555C5B4642545C4540476C495854595150425D4647575D5C"

HKEY_CURRENT_USER\Software\fgiusji
nm7 = "424548585A555C5B4642545C4540476C5F51525C5F585B555B525445515C45"

HKEY_CURRENT_USER\Software\fgiusji
nm1 = "424548585A555C5B4642545C4540476C425A50475D5F515B"

HKEY_CURRENT_USER\Software\fgiusji
nm3 = "424548585A555C5B4642545C4540476C40515241485958"

HKEY_CURRENT_USER\Software\fgiusji
lfi = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm4 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm5 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm9 = "424548585A555C5B4642545C4540476C5D5952575E5754515B58565542495453531F544854"

HKEY_CURRENT_USER\Software\fgiusji
nm11 = "424548585A555C5B4642545C454047"

HKEY_CURRENT_USER\Software\fgiusji
nm18 = "0208"

HKEY_CURRENT_USER\Software\fgiusji
nm19 = "0208"

HKEY_CURRENT_USER\Software\fgiusji
nm20 = "585E4555435F5445105548405D5F435543"

HKEY_CURRENT_USER\Software\fgiusji
nm21 = "46595F545E4642115D5554595010415C50495442"

HKEY_CURRENT_USER\Software\fgiusji
nm22 = "585549405D5E43541E554855"

HKEY_CURRENT_USER\Software\fgiusji
nm23 = "465D415C504854431E554855"

HKEY_CURRENT_USER\Software\fgiusji
nm24 = "041E01"

HKEY_CURRENT_USER\Software\fgiusji
nm26 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm28 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm29 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm30 = "{random characters}"

HKEY_CURRENT_USER\Software\fgiusji
nm31 = "{random characters}"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://griffethunder.{BLOCKED}agemdesites.ws/html_public/pedro.png
  • http://griffethunder.{BLOCKED}agemdesites.ws/html_public/uniao.png
  • http://griffethunder.{BLOCKED}agemdesites.ws/html_public/lucas.png
  • http://griffethunder.{BLOCKED}agemdesites.ws/html_public/saulo.png
  • {BLOCKED}0.1

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.750

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

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
    • fgiusji

Step 3

Delete this registry value

[ 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\fgiusji
    • nm10 = "0306"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm13 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm15 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm16 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm17 = "594445400B1E1E5F5F465F435E5E595F421E525F5D1F52421E5143404558465E1F525E5F5A59541F444944"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm2 = "424548585A555C5B4642545C4540476C495854595150425D4647575D5C"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm7 = "424548585A555C5B4642545C4540476C5F51525C5F585B555B525445515C45"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm1 = "424548585A555C5B4642545C4540476C425A50475D5F515B"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm3 = "424548585A555C5B4642545C4540476C40515241485958"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • lfi = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm4 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm5 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm9 = "424548585A555C5B4642545C4540476C5D5952575E5754515B58565542495453531F544854"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm11 = "424548585A555C5B4642545C454047"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm18 = "0208"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm19 = "0208"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm20 = "585E4555435F5445105548405D5F435543"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm21 = "46595F545E4642115D5554595010415C50495442"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm22 = "585549405D5E43541E554855"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm23 = "465D415C504854431E554855"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm24 = "041E01"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm26 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm28 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm29 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm30 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\fgiusji
    • nm31 = "{random characters}"

Step 4

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Profile%\Application Data\suyhkdmjvrdltpv

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_BANLOAD.YWNFW. 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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