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Ransom_CRYPAURA.MOLE

September 26, 2017
 Analysis by: Byron Jon Gelera
 Modified by: Automation
 ALIASES:

Ransom:Win32/Ranscrape (Microsoft); RDN/Ransom (McAfee); Ransom.Troldesh (Symantec); Trojan-Ransom.Win32.Fury.hn (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Atros5.BTHO (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

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 drops the following copies of itself into the affected system:

  • %User Profile%\Application Data\CC58263A.exe

(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.)

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
00AECC58263A = "{malware path and file name} "

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
CC58263A = "%User Profile%\Application Data\CC58263A.exe "

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
00AECC58263A = "%User Profile%\Application Data\CC58263A.exe "

Other System Modifications

This Trojan deletes the following files:

  • %User Profile%\NTUSER.DAT
  • %User Profile%\ntuser.dat.LOG
  • %User Profile%\History.IE5\index.dat
  • %User Profile%\Templates\amipro.sam
  • %User Profile%\Templates\excel.xls
  • %User Profile%\Templates\excel4.xls
  • %User Profile%\Templates\powerpnt.ppt
  • %User Profile%\Templates\quattro.wb2
  • %User Profile%\Templates\sndrec.wav
  • %User Profile%\Templates\winword.doc
  • %User Profile%\Templates\winword2.doc
  • %User Profile%\Templates\wordpfct.wpd
  • %User Profile%\Templates\wordpfct.wpg
  • %User Profile%\MSHist012013061320130614\index.dat
  • %Desktop%\_HELP_INSTRUCTION.TXT

(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.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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 entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
FACC58263A = "7b39bf45-7235-4316-80a4-839c65dffc2a"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "4"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "5"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "6"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "7"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "8"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "9"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "a"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "b"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "c"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "d"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "e"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "f"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "11"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "12"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "13"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "14"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "15"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "16"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "17"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "18"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "19"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
CC58263A = "1a"

Dropping Routine

This Trojan drops the following files:

  • %User Profile%\Application Data\26E14BA00B70A5D0AE4EBAD33D3416B0.MOLE
  • %User Profile%\1E7A935926E5FEE26EB19B8D26F8CBF2.MOLE
  • %User Profile%\0D8F8E2E0389246C416CC439039BF17C.MOLE
  • %User Profile%\History.IE5\48CAFFF217BAA07E3094660617CD59EA.MOLE
  • %User Profile%\Templates\3238DCC601D88A80EAC5BA4901EB5104.MOLE
  • %User Profile%\Templates\44C4C76A18B7E1B0DB5AA3CE18CAA834.MOLE
  • %User Profile%\Templates\10A5115C264DE88A54B89B822660AF0E.MOLE
  • %User Profile%\Templates\E9230CA61814F775089D54BE1827BDF9.MOLE
  • %User Profile%\Templates\D34C706042D82FE4CC5BFA0842EAF668.MOLE
  • %User Profile%\Templates\B3CDD3D01FA3462CC31307A81FB60CB0.MOLE
  • %User Profile%\Templates\8B6995822BD94E79CD376ED62BEC14FD.MOLE
  • %User Profile%\Templates\B50EFC1A4AC1D33E5A21BB2E4AD499C2.MOLE
  • %User Profile%\Templates\8EF7A9F80CBB0F8EF2EE12940CCDD612.MOLE
  • %User Profile%\Templates\00ECE49434B7D46CA284F93534CA9AF0.MOLE
  • %User Profile%\History.IE5\6BE1CD32177936F651CF62A2178BF062.MOLE
  • %User Profile%\History.IE5\FD00AEE825EFF1D0B016C5592602AB3C.MOLE
  • %User Profile%\MSHist012013061320130614\B5D7E7042AF72C0C13EBD4672B09DEEC.MOLE
  • %User Profile%\Templates\0DDB14CE3408719F92B89626341B3823.MOLE
  • %User Profile%\Templates\485655743E12A2945C2AB0813E256918.MOLE
  • %User Profile%\Templates\7C8F266A127152D450EC9E0612841958.MOLE
  • %User Profile%\Templates\A6CF4FE6060D1C74ECAA8BC7061FE2F8.MOLE
  • %User Profile%\Templates\566DDBC5170397A213033EEF17165E26.MOLE
  • %User Profile%\Templates\AF57E0410B88E9066E3B2CEF0B9BAF8A.MOLE
  • %User Profile%\Templates\0E7EC598196D68D449610C7E19802F58.MOLE
  • %User Profile%\Templates\9A8B2F8826D91520E9F0518F26EBDBA4.MOLE
  • %User Profile%\Templates\0C8B63A21A23D6EE35772E9D1A369D72.MOLE
  • %User Profile%\Templates\2333AC6C47DDC182B05F05FA47F08806.MOLE

(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 Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}7.240.227

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 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
    • 00AECC58263A = "{malware path and file name} "
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • CC58263A = "%User Profile%\Application Data\CC58263A.exe "
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • 00AECC58263A = "%User Profile%\Application Data\CC58263A.exe "
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • FACC58263A = "7b39bf45-7235-4316-80a4-839c65dffc2a"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "3"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "4"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "5"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "6"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "7"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "8"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "9"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "a"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "b"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "c"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "d"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "e"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "f"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "11"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "12"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "13"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "14"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "15"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "16"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "17"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "18"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "19"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • CC58263A = "1a"

Step 4

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.
  • %User Profile%\Application Data\26E14BA00B70A5D0AE4EBAD33D3416B0.MOLE
  • %User Profile%\1E7A935926E5FEE26EB19B8D26F8CBF2.MOLE
  • %User Profile%\0D8F8E2E0389246C416CC439039BF17C.MOLE
  • %User Profile%\History.IE5\48CAFFF217BAA07E3094660617CD59EA.MOLE
  • %User Profile%\Templates\3238DCC601D88A80EAC5BA4901EB5104.MOLE
  • %User Profile%\Templates\44C4C76A18B7E1B0DB5AA3CE18CAA834.MOLE
  • %User Profile%\Templates\10A5115C264DE88A54B89B822660AF0E.MOLE
  • %User Profile%\Templates\E9230CA61814F775089D54BE1827BDF9.MOLE
  • %User Profile%\Templates\D34C706042D82FE4CC5BFA0842EAF668.MOLE
  • %User Profile%\Templates\B3CDD3D01FA3462CC31307A81FB60CB0.MOLE
  • %User Profile%\Templates\8B6995822BD94E79CD376ED62BEC14FD.MOLE
  • %User Profile%\Templates\B50EFC1A4AC1D33E5A21BB2E4AD499C2.MOLE
  • %User Profile%\Templates\8EF7A9F80CBB0F8EF2EE12940CCDD612.MOLE
  • %User Profile%\Templates\00ECE49434B7D46CA284F93534CA9AF0.MOLE
  • %User Profile%\History.IE5\6BE1CD32177936F651CF62A2178BF062.MOLE
  • %User Profile%\History.IE5\FD00AEE825EFF1D0B016C5592602AB3C.MOLE
  • %User Profile%\MSHist012013061320130614\B5D7E7042AF72C0C13EBD4672B09DEEC.MOLE
  • %User Profile%\Templates\0DDB14CE3408719F92B89626341B3823.MOLE
  • %User Profile%\Templates\485655743E12A2945C2AB0813E256918.MOLE
  • %User Profile%\Templates\7C8F266A127152D450EC9E0612841958.MOLE
  • %User Profile%\Templates\A6CF4FE6060D1C74ECAA8BC7061FE2F8.MOLE
  • %User Profile%\Templates\566DDBC5170397A213033EEF17165E26.MOLE
  • %User Profile%\Templates\AF57E0410B88E9066E3B2CEF0B9BAF8A.MOLE
  • %User Profile%\Templates\0E7EC598196D68D449610C7E19802F58.MOLE
  • %User Profile%\Templates\9A8B2F8826D91520E9F0518F26EBDBA4.MOLE
  • %User Profile%\Templates\0C8B63A21A23D6EE35772E9D1A369D72.MOLE
  • %User Profile%\Templates\2333AC6C47DDC182B05F05FA47F08806.MOLE

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom_CRYPAURA.MOLE. 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 6

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 Profile%\NTUSER.DAT
  • %User Profile%\ntuser.dat.LOG
  • %User Profile%\History.IE5\index.dat
  • %User Profile%\Templates\amipro.sam
  • %User Profile%\Templates\excel.xls
  • %User Profile%\Templates\excel4.xls
  • %User Profile%\Templates\powerpnt.ppt
  • %User Profile%\Templates\quattro.wb2
  • %User Profile%\Templates\sndrec.wav
  • %User Profile%\Templates\winword.doc
  • %User Profile%\Templates\winword2.doc
  • %User Profile%\Templates\wordpfct.wpd
  • %User Profile%\Templates\wordpfct.wpg
  • %User Profile%\MSHist012013061320130614\index.dat
  • %Desktop%\_HELP_INSTRUCTION.TXT


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