Ransom_CRYPCHIM.CE
Ransom:Win32/Vigorf.A (Microsoft), Trojan-Ransom.Win32.Chimera.a (Kaspersky), Win32.Trojan-Ransom.Chimera.A (GData)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to certain websites to send and receive information.
It encrypts files with specific file extensions. It drops files as ransom note.
TECHNICAL DETAILS
74,620 bytes
EXE
Petite
No
01 Oct 2018
Encrypts files, Compromises system security, Steals information, Downloads files
Arrival Details
This Ransomware 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 Ransomware adds the following processes:
- iexplore.exe
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- {Hash of Machine GUID}
Information Theft
This Ransomware gathers the following data:
- Machine Name
- IP
Other Details
This Ransomware connects to the following URL(s) to get the affected system's IP address:
- http://bot.{BLOCKED}myipaddress.com
It connects to the following website to send and receive information:
- {BLOCKED}.{BLOCKED}.{BLOCKED}8.168
- {BLOCKED}.{BLOCKED}.211.81
It does the following:
- After encrypting files it will executed commands to display its ransom note:
- "%Program Files%\Internet Explorer\iexplore.exe" -k "%Application Data%\Adobe\Acrobat\9.0\YOUR_FILES_ARE_ENCRYPTED.HTML"
- It encrypts files which can be found in the following locations:
- Removable Drives
- Fixed Drives
- Shared Drives
- Network Drives
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .docx
- .docm
- .xlsm
- .xlsb
- .xlsx
- .pptm
- .pptx
- .epub
- .jpeg
- .accdb
- .conf
- .config
- .azw1
- .azw3
- .azw4
- .apnx
- .mobi
- .html
- .class
- .java
- .aspx
- .sqllite
- .indd
- .number
- .pages
- .crwl
- .tiff
- .jfif
- .pspimage
- .mpeg
- .movie
- .mp4v
- .mpv2
- .aepx
- .camproj
- .dash
- .gzip
- .vmdk
- .toast
- .disc
It avoids encrypting files with the following strings in their file path:
- \Windows
- \$Recycle.Bin
- \Microsoft
- \Mozilla Firefox
- \Opera
- \Internet Explorer
- \Temp
- \Local
- \LocalLow
- \Chrome
It drops the following file(s) as ransom note:
- {encrypted file directory}\YOUR_FILES_ARE_ENCRYPTED.HTML
SOLUTION
9.750
14.156.06
28 Mar 2018
14.157.00
29 Mar 2018
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
Identify and terminate files detected as Ransom_CRYPCHIM.CE
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Search and delete this file
- YOUR_FILES_ARE_ENCRYPTED.HTML
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom_CRYPCHIM.CE. 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 the following Trend Micro Support pages for more information:
Step 6
Restore encrypted files from backup.
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