Analysis by: Cris Nowell Pantanilla

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

This malware is a variant of the SOREBRECT malware that Trend Micro discovered on June 2017. It sports fileless, code-injecting capabilities. Users affected by this malware may find their critical documents and files encrypted and rendered useless.

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 deletes itself after execution. It gathers information and reports it to its servers.

  TECHNICAL DETAILS

Payload: Drops files, Connects to URLs/IPs, 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:

  • {folder of encrypted files}\READ ME ABOUT DECRYPTION.txt ← ransom note

It adds the following processes:

  • svchost.exe

It injects codes into the following process(es):

  • svchost.exe

Other Details

This Ransomware connects to the following URL(s) to get the affected system's IP address:

  • ipinfo.io

It connects to the following website to send and receive information:

  • {BLOCKED}l7s7ynmazxwu.onion/gate.php

It renames encrypted files using the following names:

  • {original filename}.pr0tect

It does the following:

  • It avoids encrypting files in the following directories:
    • Windows
    • Desktop
  • It terminates services with the following strings:
    • AMS
    • ARSM
    • AcrSch2Svc
    • Acronis
    • AcronisAgent
    • AcronisFS
    • AcronisPXE
    • AdobeARMservice
    • Altaro.Agent.exe
    • Altaro.HyperV.WAN.RemoteService.exe
    • Altaro.SubAgent.exe
    • Altaro.UI.Service.exe
    • Apache2.2
    • Apache2.4
    • AutoDeploy
    • Backup
    • BackupExecAgentAccelerator
    • BackupExecAgentBrowser
    • BackupExecDeviceMediaService
    • BackupExecJobEngine
    • BackupExecManagementService
    • BackupExecRPCService
    • Browser
    • Catalog
    • CertPropSvc
    • CertSvc
    • CobianBackup11
    • ComarchAutomatSynchronizacji
    • ComarchML
    • ComarchUpdateAgentService
    • Connection
    • CrashPlanService
    • DLOAdminSvcu
    • DLOMaintenanceSvc
    • DataCollectorSvc
    • DbxSvc
    • DomainManagerProviderSvc
    • EDBSRVR
    • FBSServer
    • FBSWorker
    • FirebirdGuardianDefaultInstance
    • FirebirdServerDefaultInstance
    • GenetecSecurityCenterMobileServer
    • GenetecServer
    • GenetecWatchdog
    • KAORCMP999467066507407
    • LMIRfsDriver
    • LogisticsServicesHost800
    • MELCS
    • MEMTAS
    • MEPOCS
    • MEPOPS
    • MESMTPCS
    • MICROMD72ONCOEMR
    • MMS
    • MSExchangeADTopology
    • MSExchangeAntispamUpdate
    • MSExchangeEdgeSync
    • MSExchangeFBA
    • MSExchangeFDS
    • MSExchangeIS
    • MSExchangeImap4
    • MSExchangeMailSubmission
    • MSExchangeMailboxAssistants
    • MSExchangeMonitoring
    • MSExchangePop3
    • MSExchangeRep
    • MSExchangeRepl
    • MSExchangeSA
    • MSExchangeSearch
    • MSExchangeServiceHost
    • MSExchangeTransport
    • MSExchangeTransportLogSearch
    • MSSQL$ACRONIS
    • MSSQL$BKUPEXEC
    • MSSQL$MICROSOFT##SSEE
    • MSSQL$MICROSOFT##WID
    • MSSQL$PROBA
    • MSSQL$SBSMONITORING
    • MSSQL$SHAREPOINT
    • MSSQL$SQL2005
    • MSSQL$SQLEXPRESS
    • MSSQL$VEEAMSQL2008R2
    • MSSQLFDLauncher
    • MSSQLFDLauncher$PROBA
    • MSSQLFDLauncher$SBSMONITORING
    • MSSQLFDLauncher$SHAREPOINT
    • MSSQLSERVER
    • MSSQLSERVR
    • MSSQLServerADHelper
    • MSSQLServerADHelper100
    • MSSQLServerOLAPService
    • MicroMD
    • MsDtsServer
    • MsDtsServer100
    • MySQL
    • MySQL56
    • NAVSERVER
    • ONCOEMR2MICROMD7
    • POP3
    • PRIMAVERAWindowsService
    • PleskControlPanel
    • PleskSQLServer
    • PopPassD
    • PrimaveraWS800
    • PrimaveraWS900
    • Provider
    • QBCFMonitorService
    • QBFCService
    • QBVSS
    • QuickBooksDB23
    • QuickBooksDB25
    • RBMS_OptimaBI
    • RBSS_OptimaBI
    • RemoteSystemMonitorService
    • Replication
    • ReportServer
    • SBOClientAgent
    • SPAdminV4
    • SPSearch4
    • SPTimerV3
    • SPTrace
    • SPTraceV4
    • SPWriter
    • SPWriterV4
    • SQLAgent$PROBA
    • SQLAgent$SBSMONITORING
    • SQLAgent$SHAREPOINT
    • SQLAgent$SQLEXPRESS
    • SQLAgent$VEEAMSQL2008R2
    • SQLBrowser
    • SQLSERVERAGENT
    • SQLWriter
    • Server
    • ServerService
    • Service
    • ShadowProtectSvc
    • StorageNode
    • Sync
    • TTESCheduleServer800
    • TeamViewer
    • VSNAPVSS
    • VSS
    • Veeam
    • VeeamCatalogSvc
    • VeeamCloudSvc
    • VeeamDeploymentService
    • VeeamMountSvc
    • VeeamNFSSvc
    • VeeamTransportSvc
    • W32Time
    • W3SVC
    • WSS_ComputerBackupProviderSvc
    • WSS_ComputerBackupSvc
    • WSearch
    • WinVNC4
    • WseComputerBackupSvc
    • WseEmailSvc
    • WseHealthSvc
    • WseMediaSvc
    • WseMgmtSvc
    • WseNtfSvc
    • WseStorageSvc
    • ZWCService
    • bedbg
    • cbVSCService11
    • dashboardMD
    • dbupdate
    • dbupdatem
    • eXchange
    • memcached
    • msftesql$SBSMONITORING
    • msftesql-Exchange
    • plesksrv
    • postgresql-8.4
    • sesvc
    • spiceworks
    • stc_raw_agent
    • swprv
    • vds
    • vmicvss
    • vmms
    • wsbexchange
    • zBackupAssistService
  • It clears all Windows Event logs using the wevtutil.exe command.
  • It uses TOR to secure its connection.

It deletes itself after execution.

It gathers the following information and reports it to its servers:

  • Computer Name
  • Username
  • Malware path
  • New infection
  • Contents of auth.txt and info.txt.

NOTES:

This ransomware drops the following ransom note on all affected folders:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.332.07
FIRST VSAPI PATTERN DATE: 10 Apr 2017
VSAPI OPR PATTERN File: 13.333.00
VSAPI OPR PATTERN Date: 11 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

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_SOREBRECT.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 3

Search and delete this file

[ Learn More ]
There may be some files 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.  {folder of encrypted files}\READ ME ABOUT DECRYPTION.txt

Step 4

Restore encrypted files from backup.


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