ALIASES:

Ransom:Win32/Troldesh.A (Microsoft); Trojan-FKQC!9F720BAD5397 (McAfee); Packed.Generic.459 (Symantec); Trojan-Ransom.Win32.Shade.mqy (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse SHeur4.COAT (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: 1,940,480 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 08 May 2017

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 Temp%\6893A5D897
  • %User Profile%\Application Data\Windows
  • %User Profile%\Application Data\System32

(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.. %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.)

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
Client Server Runtime Subsystem = "%User Profile%\Windows\csrss.exe "

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\6893A5~1\unverified-microdesc-consensus

(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.)

It adds the following registry keys:

hkey_local_machine\software\microsoft\
esent\process\{malware file name}

hkey_local_machine\software\microsoft\
esent\process\{malware file name}\
debug

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xi = "9002525B54638879EC63"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xVersion = "4.0.0.1"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xmode = "735"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xpk = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xstate = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
shst = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xstate = "4"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "4"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "5"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "6"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "8"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "9"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "10"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "11"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "13"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "14"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "15"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "16"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "17"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "18"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "19"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "20"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "21"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "22"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "23"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "24"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "25"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "26"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "27"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "28"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "29"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "30"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "31"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "33"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "34"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "35"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "36"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "37"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "38"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "39"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "40"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "41"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "42"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "43"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "44"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "46"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "47"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "48"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "49"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "50"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "51"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "52"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "53"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "54"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "55"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "56"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "57"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "59"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "60"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "61"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "62"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "63"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "64"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "65"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "66"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "67"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "68"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "69"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "70"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "71"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "72"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "73"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "74"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "76"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "77"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "78"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "80"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "82"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "83"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "84"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "85"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "86"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "87"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "88"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "89"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "90"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "91"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "92"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "93"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "94"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "95"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "96"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "97"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "98"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "99"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "100"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "101"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "102"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "103"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "104"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "105"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "106"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "107"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "108"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "109"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "110"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "111"

HKEY_LOCAL_MACHINE\SOFTWARE\System32\
Configuration
xcnt = "112"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
EventMessageFile = "%System%\ESENT.dll"

(Note: The default value data of the said registry entry is {random values}.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
CategoryMessageFile = "%System%\ESENT.dll"

(Note: The default value data of the said registry entry is {random values}.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
CategoryCount = "1"

(Note: The default value data of the said registry entry is 10.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Eventlog\Application\
ESENT
TypesSupported = "7"

(Note: The default value data of the said registry entry is 7.)

Dropping Routine

This Trojan drops the following files:

  • %System Root%\oXbcPFEGsA
  • %System Root%\YsThTEJYZa
  • %User Profile%\Windows\csrss.exe
  • %User Temp%\6893A5~1\lock
  • %User Temp%\6893A5~1\state.tmp
  • %User Temp%\6893A5~1\unverified-microdesc-consensus.tmp
  • %User Temp%\6893A5~1\cached-certs.tmp
  • %User Temp%\6893A5~1\cached-microdesc-consensus.tmp
  • %System Root%\README1.txt
  • %System Root%\README2.txt
  • %System Root%\README3.txt
  • %System Root%\README4.txt
  • %System Root%\README5.txt
  • %System Root%\README6.txt
  • %System Root%\README7.txt
  • %System Root%\README8.txt
  • %System Root%\README9.txt
  • %System Root%\README10.txt

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %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.. %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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}0.1
  • {BLOCKED}.244.244
  • {BLOCKED}42.19
  • {BLOCKED}.105.46
  • {BLOCKED}.193.20

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.8

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

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_local_machine\software\microsoft\esent\process
    • {malware file name}
  • In hkey_local_machine\software\microsoft\esent\process\{malware file name}
    • debug

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
    • Client Server Runtime Subsystem = "%User Profile%\Windows\csrss.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xi = "9002525B54638879EC63"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xVersion = "4.0.0.1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xmode = "735"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xpk = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xstate = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • shst = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xstate = "4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "5"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "6"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "8"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "9"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "10"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "11"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "13"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "14"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "15"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "16"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "17"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "18"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "19"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "20"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "21"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "22"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "23"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "24"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "25"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "26"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "27"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "28"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "29"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "30"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "31"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "33"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "34"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "35"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "36"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "37"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "38"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "39"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "40"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "41"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "42"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "43"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "44"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "46"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "47"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "48"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "49"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "50"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "51"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "52"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "53"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "54"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "55"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "56"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "57"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "59"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "60"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "61"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "62"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "63"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "64"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "65"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "66"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "67"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "68"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "69"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "70"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "71"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "72"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "73"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "74"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "76"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "77"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "78"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "80"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "82"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "83"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "84"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "85"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "86"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "87"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "88"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "89"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "90"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "91"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "92"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "93"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "94"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "95"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "96"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "97"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "98"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "99"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "100"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "101"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "102"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "103"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "104"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "105"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "106"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "107"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "108"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "109"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "110"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "111"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\System32\Configuration
    • xcnt = "112"

Step 5

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: EventMessageFile = "%System%\ESENT.dll"
      To: EventMessageFile = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: CategoryMessageFile = "%System%\ESENT.dll"
      To: CategoryMessageFile = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: CategoryCount = "1"
      To: CategoryCount = ""10""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\ESENT
    • From: TypesSupported = "7"
      To: TypesSupported = ""7""

Step 6

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %System Root%\oXbcPFEGsA
  • %System Root%\YsThTEJYZa
  • %User Profile%\Windows\csrss.exe
  • %User Temp%\6893A5~1\lock
  • %User Temp%\6893A5~1\state.tmp
  • %User Temp%\6893A5~1\unverified-microdesc-consensus.tmp
  • %User Temp%\6893A5~1\cached-certs.tmp
  • %User Temp%\6893A5~1\cached-microdesc-consensus.tmp
  • %System Root%\README1.txt
  • %System Root%\README2.txt
  • %System Root%\README3.txt
  • %System Root%\README4.txt
  • %System Root%\README5.txt
  • %System Root%\README6.txt
  • %System Root%\README7.txt
  • %System Root%\README8.txt
  • %System Root%\README9.txt
  • %System Root%\README10.txt

Step 7

Search and delete these folders

[ 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 Temp%\6893A5D897
  • %User Profile%\Application Data\Windows
  • %User Profile%\Application Data\System32

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom_CRYPSHED.THDBE. 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%\6893A5~1\unverified-microdesc-consensus


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