RANSOM_NARLAN.A
Trojan-Ransom.Lanran (A)(Emsisoft)
Windows

Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
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.
TECHNICAL DETAILS
109,056 bytes
EXE
No
31 Mar 2017
Displays message/message boxes, 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 files:
- %Application Data%\img.jpg - set as desktop wallpaper
- {existing drives}\@__help My.exe - contains ransom note
- {malware location}\@__help My.exe - contains ransom note
- {malware location}\LanRan
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 System Modifications
This Ransomware adds the following registry keys:
HKEY_CURRENT_USER\Software\ShortCutInfection
It adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\ShortCutInfection
cyber = True
Other Details
This Ransomware encrypts files with the following extensions:
- .png
- .3dm
- .3g2
- .3gp
- .aaf
- .accdb
- .aep
- .txt
- .aepx
- .aet
- .ai
- .iso
- .aif
- .PNG
- .php
- .c
- .java
- .arw
- .as
- .as3
- .asf
- .asp
- .asx
- .avi
- .bay
- .bmp
- .cdr
- .cer
- .class
- .cpp
- .cr2
- .crt
- .crw
- .cs
- .csv
- .db
- .dbf
- .dcr
- .der
- .dng
- .doc
- .docb
- .docm
- .docx
- .dot
- .dotm
- .dotx
- .dwg
- .dxf
- .dxg
- .efx
- .eps
- .erf
- .fla
- .flv
- .idml
- .iff
- .indb
- .indd
- .indl
- .indt
- .inx
- .jar
- .java
- .jpeg
- .jpg
- .kdc
- .m3u
- .m3u8
- .m4u
- .max
- .mdb
- .mdf
- .mef
- .mid
- .mov
- .mp3
- .mp4
- .mpa
- .mpeg
- .mpg
- .mrw
- .msg
- .nef
- .nrw
- .odb
- .odc
- .odm
- .odp
- .ods
- .odt
- .orf
- .p12
- .p7b
- .p7c
- .pdb
- .pef
- .pem
- .pfx
- .php
- .plb
- .pmd
- .pot
- .potm
- .potx
- .ppam
- .ppj
- .pps
- .ppsm
- .ppsx
- .ppt
- .pptm
- .pptx
- .prel
- .prproj
- .ps
- .psd
- .pst
- .ptx
- .r3d
- .ra
- .raf
- .rar
- .raw
- .rb
- .rtf
- .rw2
- .rwl
- .sdf
- .sldm
- .sldx
- .sql
- .sr2
- .srf
- .srw
- .svg
- .swf
- .tif
- .vcf
- .vob
- .wav
- .wb2
- .wma
- .wmv
- .wpd
- .wps
- .x3f
- .xla
- .xlam
- .xlk
- .xll
- .xlm
- .xls
- .xlsb
- .xlsm
- .xlsx
- .xlt
- .xltm
- .xltx
- .xlw
- .xml
- .xqx
- .zip
It renames encrypted files using the following names:
- {random filename}.LanRan
It does the following:
- It speaks the following text using text-to-speech application:
- "Attention! ,,,Attention! ,,,Attention! ,,, Attention! ,,,Attention! ,,,Your documents, photos, databases and other important files have been encrypted,,, Your documents, photos, databases and other important files have been encrypted,,, Your documents, photos, databases and other important files have been encrypted ,,, Your documents, photos, databases and other important files have been encrypted ,,, Your documents, photos, databases and other important files have been encrypted "
- It only encrypts files in the %Desktop% directory.
(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.)
NOTES:
This ransomware sets the system's desktop wallpaper to the following image:
It also displays the following window showing the ransom note:
SOLUTION
9.850
13.312.02
01 Apr 2017
13.313.00
02 Apr 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
Delete this registry key
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
- ShortCutInfection
- ShortCutInfection
Step 5
Search and delete this file
- %Application Data%\img.jpg
- {existing drives}\@__help My.exe
- {malware location}\@__help My.exe
- {malware location}\LanRan
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_NARLAN.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 7
Restore encrypted files from backup.
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