Analysis by: John Anthony Banes
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: 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

File Size: 9,728 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 19 Apr 2017
Payload: 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.

Other Details

This Ransomware encrypts files with the following extensions:

  • .7z
  • .ai
  • .bmp
  • .cer
  • .crt
  • .der
  • .doc
  • .docx
  • .dwg
  • .eps
  • .gif
  • .hwp
  • .jpeg
  • .jpg
  • .key
  • .mp3
  • .ods
  • .odt
  • .ogg
  • .one
  • .p12
  • .p7b
  • .p7c
  • .pdf
  • .pef
  • .pem
  • .pfx
  • .png
  • .ppt
  • .pptx
  • .psd
  • .ptx
  • .rdp
  • .rtf
  • .srw
  • .swf
  • .tif
  • .tiff
  • .torrent
  • .txt
  • .uti
  • .x3f
  • .xls
  • .xlsx
  • .xps
  • .zip

It renames encrypted files using the following names:

  • {original filename and extension}.LOLI

It does the following:

  • It avoids encrypting files in directories containing the following strings:
    • windows
    • microsoft
    • temp
  • It encrypts files that are less than 100MB.

NOTES:

It displays a console to show the status of encryption:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.352.04
FIRST VSAPI PATTERN DATE: 20 Apr 2017
VSAPI OPR PATTERN File: 13.353.00
VSAPI OPR PATTERN Date: 21 Apr 2017

Step 1

Scan your computer with your Trend Micro product to delete files detected as RANSOM_LOLI.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 2

Restore encrypted files from backup.


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