RANSOM_HIDDENTEARMOON.A
Trojan.Ransom.MoonCryptor (ALYac); Ransom:MSIL/Ryzerlo.A (Microsoft);
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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. However, as of this writing, the said sites are inaccessible. It is capable of encrypting files in the affected system.
It drops files as ransom note.
TECHNICAL DETAILS
35,328 bytes
EXE
Yes
17 Aug 2017
Connects to URLs/IPs, Drops files, Encrypts 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 drops the following file(s)/component(s):
- %Malware Path%\log.cmoon
- %Malware Path%\l.cmoon
- %Malware Path%\e.cmoon
- %Malware Path%\u.cmoon
Autostart Technique
This Ransomware modifies the following registry entries to ensure it automatic execution at every system startup:
HKCU\Software\Microsoft\
Windows\CurrentVersion\Run
moon = {Malware Path}\{Malware Name}
Other System Modifications
This Ransomware sets the system's desktop wallpaper to the following image:
- (The said site where the wallpaper will be downloaded is inaccessible.)
Download Routine
This Ransomware connects to the following URL(s) to download its component file(s):
- http://{BLOCKED}.{BLOCKED}.3.1/demand/imggenerator.php
It saves the files it downloads using the following names:
- %Desktop%\wallpaper.jpg
(Note: %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.)
Other Details
This Ransomware connects to the following website to send and receive information:
- http://{BLOCKED}.{BLOCKED}.3.1/panel/decipher.php
It encrypts files with the following extensions:
- .zip
- .7z
- .rar
- .m4a
- .wma
- .avi
- .wmv
- .csv
- .d3dbsp
- .sc2save
- .sie
- .sum
- .ibank
- .t13
- .t12
- .qdf
- .gdb
- .tax
- .pkpass
- .bc6
- .bc7
- .bkp
- .qic
- .bkf
- .sidn
- .sidd
- .mddata
- .itl
- .itdb
- .icxs
- .hvpl
- .hplg
- .hkdb
- .mdbackup
- .syncdb
- .gho
- .cas
- .svg
- .map
- .wmo
- .itm
- .sb
- .fos
- .mcgame
- .vdf
- .ztmp
- .sis
- .sid
- .ncf
- .menu
- .layout
- .dmp
- .blob
- .esm
- .001
- .vtf
- .dazip
- .fpk
- .mlx
- .kf
- .iwd
- .vpk
- .tor
- .psk
- .rim
- .w3x
- .fsh
- .ntl
- .arch00
- .lvl
- .snx
- .cfr
- .ff
- .vpp_pc
- .lrf
- .m2
- .mcmeta
- .vfs0
- .mpqge
- .kdb
- .db0
- .DayZProfile
- .rofl
- .hkx
- .bar
- .upk
- .das
- .iwi
- .litemod
- .asset
- .forge
- .ltx
- .bsa
- .apk
- .re4
- .sav
- .lbf
- .slm
- .bik
- .epk
- .rgss3a
- .pak
- .big
- .unity3d
- .wotreplay
- .xxx
- .desc
- .py
- .m3u
- .flv
- .js
- .css
- .rb
- .gif
- .png
- .jpeg
- .txt
- .p7c
- .p7b
- .p12
- .pfx
- .pem
- .crt
- .cer
- .der
- .x3f
- .srw
- .pef
- .ptx
- .r3d
- .rw2
- .rwl
- .raw
- .raf
- .orf
- .nrw
- .mrwref
- .mef
- .erf
- .kdc
- .dcr
- .cr2
- .crw
- .bay
- .sr2
- .srf
- .arw
- .3fr
- .dng
- .jpeg
- .jpg
- .cdr
- .indd
- .ai
- .eps
- .pdd
- .psd
- .dbfv
- .mdf
- .wb2
- .rtf
- .wpd
- .dxg
- .xf
- .dwg
- .pst
- .accdb
- .mdb
- .pptm
- .pptx
- .ppt
- .xlk
- .xlsb
- .xlsm
- .xlsx
- .xls
- .wps
- .docm
- .mp3
- .docx
- .doc
- .odb
- .odc
- .odm
- .odp
- .ods
- .odt
- .txt
- .doc
- .docx
- .xls
- .xlsx
- .ppt
- .pptx
- .odt
- .jpg
- .png
- .wmv
- .mp4
- .sql
- .mdb
- .php
- .asp
- .aspx
- .html
- .psd
- .xml
It does the following:
- This Ransomware connects to the following malicious URL to create and send encryption keys:
- http://{BLOCKED}.{BLOCKED}.3.1/panel/createkeys.php
- http://{BLOCKED}.{BLOCKED}.3.1/panel/savekey.php
However, as of this writing, the said sites are inaccessible.
It is capable of encrypting files in the affected system.
Ransomware Routine
This Ransomware appends the following extension to the file name of the encrypted files:
- {Encrypted File Name}.fmoon
It drops the following file(s) as ransom note:
- {folders containing encrypted files}\_readmyransom.txt
NOTES:
This Ransomware encrypts the file names of the encrypted files with the following keys:
It displays the following as ransom note:
Drop text files:
SOLUTION
9.850
13.600.08
17 Aug 2017
13.601.00
18 Aug 2017
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
Restart in Safe Mode
Step 4
Restore this modified registry value
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
- moon = {Malware Path}\{Malware Name}
- moon = {Malware Path}\{Malware Name}
Step 5
Search and delete this file
- %Malware Path%\e.cmoon
- %Malware Path%\u.cmoon
- %Malware Path%\log.cmoon
- %Malware Path%\l.cmoon
- {folders containing encrypted files}\_readmyransom.txt
Step 6
Reset your Desktop properties
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_HIDDENTEARMOON.A. 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 8
Restore encrypted files from backup.
Step 9
Scan your computer with your Trend Micro product to delete files detected as RANSOM_HIDDENTEARMOON.A. 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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