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TROJ_DROPPER.GIF

October 13, 2012
 ALIASES:

Trojan.Win32.Generic.pak!cobra (Sunbelt)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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:

108,544 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

12 Jun 2012

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\Locations

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
winhlps = "%User Profile%\Locations\winhlps.exe"

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\tst1.tmp
  • %User Temp%\tst2.tmp
  • %User Temp%\tst3.tmp
  • %User Temp%\tst4.tmp
  • %User Temp%\tst5.tmp
  • %User Temp%\tst6.tmp
  • %User Temp%\tst7.tmp
  • %User Temp%\tst8.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Text

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\RTF

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Word6

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Write

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\IP

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Recent File List

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Settings

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options
WordSel = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options
Units = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options
Maximized = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options
FrameRect = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options
PageMargin = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Text
Layout2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Text
LayoutAux2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Text
Wrap = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Text
BarState0 = "6"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Text
BarState1 = "6"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\RTF
Layout2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\RTF
LayoutAux2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\RTF
Wrap = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\RTF
BarState0 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\RTF
BarState1 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Word6
Layout2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Word6
LayoutAux2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Word6
Wrap = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Word6
BarState0 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Word6
BarState1 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Write
Layout2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Write
LayoutAux2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Write
Wrap = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Write
BarState0 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Write
BarState1 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\IP
Layout2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\IP
LayoutAux2 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\IP
Wrap = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\IP
BarState0 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\IP
BarState1 = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Applets\
Wordpad\Options
DefaultFormat = "5"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
load = "%User Profile%\Locations\winhlps.exe"

Dropping Routine

This Trojan drops the following files:

  • ka4281x3.log
  • %User Profile%\Locations\winhlps.exe
  • %User Temp%\kb71271.log
  • %User Temp%\~DF4E74.doc

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}240.217/ym/Attachments?YY=RAGB
  • http://{BLOCKED}240.217/ym/Attachments?YY=PSLH
  • http://{BLOCKED}240.217/ym/Attachments?YY=RDIF
  • http://{BLOCKED}240.217/ym/Attachments?YY=IWBY
  • http://{BLOCKED}240.217/ym/Attachments?YY=MBBV
  • http://{BLOCKED}240.217/ym/Attachments?YY=NBBX
  • http://{BLOCKED}240.217/ym/Attachments?YY=UXEY
  • http://{BLOCKED}240.217/ym/Attachments?YY=RGWZ
  • http://{BLOCKED}240.217/ym/Attachments?YY=TNCB
  • http://{BLOCKED}240.217/ym/Attachments?YY=OFFE
  • http://{BLOCKED}240.217/ym/Attachments?YY=UIMR
  • http://{BLOCKED}240.217/ym/Attachments?YY=MPAJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=AKYT
  • http://{BLOCKED}240.217/ym/Attachments?YY=WKFR
  • http://{BLOCKED}240.217/ym/Attachments?YY=OUYO
  • http://{BLOCKED}240.217/ym/Attachments?YY=JNWB
  • http://{BLOCKED}240.217/ym/Attachments?YY=EOYE
  • http://{BLOCKED}240.217/ym/Attachments?YY=CQLU
  • http://{BLOCKED}240.217/ym/Attachments?YY=ARHG
  • http://{BLOCKED}240.217/ym/Attachments?YY=JYFX
  • http://{BLOCKED}240.217/ym/Attachments?YY=ATZR
  • http://{BLOCKED}240.217/ym/Attachments?YY=IHDL
  • http://{BLOCKED}240.217/ym/Attachments?YY=MREW
  • http://{BLOCKED}240.217/ym/Attachments?YY=BVBY
  • http://{BLOCKED}240.217/ym/Attachments?YY=KMBM
  • http://{BLOCKED}240.217/ym/Attachments?YY=YATL
  • http://{BLOCKED}240.217/ym/Attachments?YY=OXRA
  • http://{BLOCKED}240.217/ym/Attachments?YY=TIPZ
  • http://{BLOCKED}240.217/ym/Attachments?YY=MDCP
  • http://{BLOCKED}240.217/ym/Attachments?YY=SMMR
  • http://{BLOCKED}240.217/ym/Attachments?YY=SIMF
  • http://{BLOCKED}240.217/ym/Attachments?YY=LLBA
  • http://{BLOCKED}240.217/ym/Attachments?YY=NHCR
  • http://{BLOCKED}240.217/ym/Attachments?YY=GRUX
  • http://{BLOCKED}240.217/ym/Attachments?YY=KIAR
  • http://{BLOCKED}240.217/ym/Attachments?YY=MJBX
  • http://{BLOCKED}240.217/ym/Attachments?YY=QOQY
  • http://{BLOCKED}240.217/ym/Attachments?YY=KXGJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=BZGY
  • http://{BLOCKED}240.217/ym/Attachments?YY=TLOQ
  • http://{BLOCKED}240.217/ym/Attachments?YY=RGBK
  • http://{BLOCKED}240.217/ym/Attachments?YY=LPPW
  • http://{BLOCKED}240.217/ym/Attachments?YY=JQGH
  • http://{BLOCKED}240.217/ym/Attachments?YY=GDBK
  • http://{BLOCKED}240.217/ym/Attachments?YY=MTXL
  • http://{BLOCKED}240.217/ym/Attachments?YY=NHBP
  • http://{BLOCKED}240.217/ym/Attachments?YY=FSSN
  • http://{BLOCKED}240.217/ym/Attachments?YY=ZMFO
  • http://{BLOCKED}240.217/ym/Attachments?YY=ZDPV
  • http://{BLOCKED}240.217/ym/Attachments?YY=YUSA
  • http://{BLOCKED}240.217/ym/Attachments?YY=YNBO
  • http://{BLOCKED}240.217/ym/Attachments?YY=XGDO
  • http://{BLOCKED}240.217/ym/Attachments?YY=WYYS
  • http://{BLOCKED}240.217/ym/Attachments?YY=NZFJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=ALGG
  • http://{BLOCKED}240.217/ym/Attachments?YY=YNYV
  • http://{BLOCKED}240.217/ym/Attachments?YY=DPAH
  • http://{BLOCKED}240.217/ym/Attachments?YY=FYOL
  • http://{BLOCKED}240.217/ym/Attachments?YY=VPBF
  • http://{BLOCKED}240.217/ym/Attachments?YY=NKRT
  • http://{BLOCKED}240.217/ym/Attachments?YY=FEZO
  • http://{BLOCKED}240.217/ym/Attachments?YY=EPBD
  • http://{BLOCKED}240.217/ym/Attachments?YY=NQMF
  • http://{BLOCKED}240.217/ym/Attachments?YY=DYCC
  • http://{BLOCKED}240.217/ym/Attachments?YY=IYPM
  • http://{BLOCKED}240.217/ym/Attachments?YY=BBCN
  • http://{BLOCKED}240.217/ym/Attachments?YY=VGYY
  • http://{BLOCKED}240.217/ym/Attachments?YY=WQIA
  • http://{BLOCKED}240.217/ym/Attachments?YY=GVBS
  • http://{BLOCKED}240.217/ym/Attachments?YY=ZEXN
  • http://{BLOCKED}240.217/ym/Attachments?YY=ONCD
  • http://{BLOCKED}240.217/ym/Attachments?YY=GTJV
  • http://{BLOCKED}240.217/ym/Attachments?YY=QDKU
  • http://{BLOCKED}240.217/ym/Attachments?YY=ODYY
  • http://{BLOCKED}240.217/ym/Attachments?YY=LMIU
  • http://{BLOCKED}240.217/ym/Attachments?YY=SORB
  • http://{BLOCKED}240.217/ym/Attachments?YY=VGMC
  • http://{BLOCKED}240.217/ym/Attachments?YY=YTCZ
  • http://{BLOCKED}240.217/ym/Attachments?YY=OMAR
  • http://{BLOCKED}240.217/ym/Attachments?YY=DYRJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=VQSP
  • http://{BLOCKED}240.217/ym/Attachments?YY=LDLC
  • http://{BLOCKED}240.217/ym/Attachments?YY=RPXD
  • http://{BLOCKED}240.217/ym/Attachments?YY=FNUX
  • http://{BLOCKED}240.217/ym/Attachments?YY=IJOF
  • http://{BLOCKED}240.217/ym/Attachments?YY=OGGN
  • http://{BLOCKED}240.217/ym/Attachments?YY=PNQH
  • http://{BLOCKED}240.217/ym/Attachments?YY=MWSC
  • http://{BLOCKED}240.217/ym/Attachments?YY=JAMG
  • http://{BLOCKED}240.217/ym/Attachments?YY=OVYJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=AZPB
  • http://{BLOCKED}240.217/ym/Attachments?YY=TNPI
  • http://{BLOCKED}240.217/ym/Attachments?YY=PXIK
  • http://{BLOCKED}240.217/ym/Attachments?YY=PLJE
  • http://{BLOCKED}240.217/ym/Attachments?YY=VIEP
  • http://{BLOCKED}240.217/ym/Attachments?YY=NMUR
  • http://{BLOCKED}240.217/ym/Attachments?YY=AZKN
  • http://{BLOCKED}240.217/ym/Attachments?YY=AMRD
  • http://{BLOCKED}240.217/ym/Attachments?YY=ZGUG
  • http://{BLOCKED}240.217/ym/Attachments?YY=MYCQ
  • http://{BLOCKED}240.217/ym/Attachments?YY=IXAJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=NGLB
  • http://{BLOCKED}240.217/ym/Attachments?YY=IVJT
  • http://{BLOCKED}240.217/ym/Attachments?YY=OWFG
  • http://{BLOCKED}240.217/ym/Attachments?YY=OFDL
  • http://{BLOCKED}240.217/ym/Attachments?YY=EUSC
  • http://{BLOCKED}240.217/ym/Attachments?YY=OUKC
  • http://{BLOCKED}240.217/ym/Attachments?YY=ECQQ
  • http://{BLOCKED}240.217/ym/Attachments?YY=BHZD
  • http://{BLOCKED}240.217/ym/Attachments?YY=LSCU
  • http://{BLOCKED}240.217/ym/Attachments?YY=NMWJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=VRZM
  • http://{BLOCKED}240.217/ym/Attachments?YY=TRZS
  • http://{BLOCKED}240.217/ym/Attachments?YY=GLZH
  • http://{BLOCKED}240.217/ym/Attachments?YY=YPVH
  • http://{BLOCKED}240.217/ym/Attachments?YY=XRMY
  • http://{BLOCKED}240.217/ym/Attachments?YY=VCXN
  • http://{BLOCKED}240.217/ym/Attachments?YY=LWHN
  • http://{BLOCKED}240.217/ym/Attachments?YY=GOXP
  • http://{BLOCKED}240.217/ym/Attachments?YY=IEKS
  • http://{BLOCKED}240.217/ym/Attachments?YY=TTNK
  • http://{BLOCKED}240.217/ym/Attachments?YY=HBDM
  • http://{BLOCKED}240.217/ym/Attachments?YY=ORZX
  • http://{BLOCKED}240.217/ym/Attachments?YY=VZIZ
  • http://{BLOCKED}240.217/ym/Attachments?YY=BITT
  • http://{BLOCKED}240.217/ym/Attachments?YY=QQKW
  • http://{BLOCKED}240.217/ym/Attachments?YY=GSGK
  • http://{BLOCKED}240.217/ym/Attachments?YY=PLMK
  • http://{BLOCKED}240.217/ym/Attachments?YY=YCFN
  • http://{BLOCKED}240.217/ym/Attachments?YY=KAFS
  • http://{BLOCKED}240.217/ym/Attachments?YY=UAWI
  • http://{BLOCKED}240.217/ym/Attachments?YY=ABCD
  • http://{BLOCKED}240.217/ym/Attachments?YY=PSVQ
  • http://{BLOCKED}240.217/ym/Attachments?YY=UUKH
  • http://{BLOCKED}240.217/ym/Attachments?YY=ZIDV
  • http://{BLOCKED}240.217/ym/Attachments?YY=IVWX
  • http://{BLOCKED}240.217/ym/Attachments?YY=MKYD
  • http://{BLOCKED}240.217/ym/Attachments?YY=BIDZ
  • http://{BLOCKED}240.217/ym/Attachments?YY=VQEO
  • http://{BLOCKED}240.217/ym/Attachments?YY=YFWV
  • http://{BLOCKED}240.217/ym/Attachments?YY=DECX
  • http://{BLOCKED}240.217/ym/Attachments?YY=JOPC
  • http://{BLOCKED}240.217/ym/Attachments?YY=NAGI
  • http://{BLOCKED}240.217/ym/Attachments?YY=BXEX
  • http://{BLOCKED}240.217/ym/Attachments?YY=EYRX
  • http://{BLOCKED}240.217/ym/Attachments?YY=JGGJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=CNVJ
  • http://{BLOCKED}240.217/ym/Attachments?YY=JUXR
  • http://{BLOCKED}240.217/ym/Attachments?YY=XTGO
  • http://{BLOCKED}240.217/ym/Attachments?YY=EJZT
  • http://{BLOCKED}240.217/ym/Attachments?YY=AWNN
  • http://{BLOCKED}240.217/ym/Attachments?YY=UDBL
  • http://{BLOCKED}240.217/ym/Attachments?YY=AUMZ
  • http://{BLOCKED}240.217/ym/Attachments?YY=CGXO
  • http://{BLOCKED}240.217/ym/Attachments?YY=ZJNU

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restart in Safe Mode

[ Learn More ]

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\Microsoft\Windows\CurrentVersion\Applets
    • Wordpad
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • Options
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • Text
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • RTF
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • Word6
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • Write
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • IP
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • Recent File List
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
    • Settings

Step 4

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\Microsoft\Windows\CurrentVersion\Run
    • winhlps = "%User Profile%\Locations\winhlps.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Options
    • WordSel = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Options
    • Units = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Options
    • Maximized = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Options
    • FrameRect = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Options
    • PageMargin = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Text
    • Layout2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Text
    • LayoutAux2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Text
    • Wrap = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Text
    • BarState0 = "6"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Text
    • BarState1 = "6"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\RTF
    • Layout2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\RTF
    • LayoutAux2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\RTF
    • Wrap = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\RTF
    • BarState0 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\RTF
    • BarState1 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Word6
    • Layout2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Word6
    • LayoutAux2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Word6
    • Wrap = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Word6
    • BarState0 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Word6
    • BarState1 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Write
    • Layout2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Write
    • LayoutAux2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Write
    • Wrap = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Write
    • BarState0 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Write
    • BarState1 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\IP
    • Layout2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\IP
    • LayoutAux2 = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\IP
    • Wrap = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\IP
    • BarState0 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\IP
    • BarState1 = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad\Options
    • DefaultFormat = "5"

Step 5

Restore this modified 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\Microsoft\Windows NT\CurrentVersion\Windows
    • load = "%User Profile%\Locations\winhlps.exe"

Step 6

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • ka4281x3.log
  • %User Profile%\Locations\winhlps.exe
  • %User Temp%\kb71271.log
  • %User Temp%\~DF4E74.doc

Step 7

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\Locations

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DROPPER.GIF. 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.

Step 9

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\tst1.tmp
  • %User Temp%\tst2.tmp
  • %User Temp%\tst3.tmp
  • %User Temp%\tst4.tmp
  • %User Temp%\tst5.tmp
  • %User Temp%\tst6.tmp
  • %User Temp%\tst7.tmp
  • %User Temp%\tst8.tmp


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