RagnarLocker Ransomware

RagnarLocker is identified by the extension “.RGNR_,” where is a hash of the computer’s NETBIOS name. The actors, identifying themselves as “RAGNAR_LOCKER,” leave a .txt ransom note, with instructions on how to pay the ransom and decrypt the data.
RagnarLocker uses VMProtect, UPX, and custom packing algorithms and deploys within an attacker’s custom Windows XP virtual machine on a target’s site.

Ragnar Locker uses Windows API GetLocaleInfoW to identify the location of the infected machine.
If the victim location is identified as “Azerbaijani,” “Armenian,” “Belorussian,”, “Kazakh,” “Kyrgyz,” “Moldavian,” “Tajik,” “Russian,” “Turkmen,” “Uzbek,” “Ukrainian,” or
“Georgian,” the process terminates.

RagnarLocker checks for current infections to prevent multiple transform encryption of the data, potentially corrupting it. The binary gathers the unique machine GUID, operating system product name, and user name currently running the process.
This data is sent through a custom hashing algorithm to generate a unique identifier: —-
RagnarLocker identifies all attached hard drives using Windows APIs: CreateFileW, DeviceIoControl, GetLogicalDrives, and SetVolumeMountPointA.
The ransomware assigns a drive letter to any volumes not assigned a logical drive letter and makes them accessible.

These newly attached volumes are later encrypted during the final stage of the binary.
RagnarLocker iterates through all running services and terminates services commonly used by managed service providers to remotely administer networks.
The malware then attempts to silently delete all Volume Shadow Copies, preventing user recovery of encrypted files, using two different methods:
– >vssadmin delete shadows /all /quiet
– >wmic.exe.shadowcopy.delete
Lastly, RagnarLocker encrypts all available files of interest.
Instead of choosing which files to encrypt, RagnarLocker chooses which folders it will not encrypt.
Taking this approach allows the computer to continue to operate “normally” while the malware encrypts files with known and unknown extensions containing data of value to the victim.
For example, if the logical drive being processed is the C: drive, the malware does not encrypt files in the following folders:
– Windows

– Windows.old
– Mozilla
– Mozilla Firefox
– Tor browser
– Internet Explorer
– $Recycle.Bin
– Program Data
– Google
– Opera
– Opera Software
Also, when iterating through files, the malware does not encrypt files with the following
– .db
– .sys
– .dll
– .lnk
– .msi
– .drv
– .exe

Sign Up For Threat Alerts

Threats Icon

Dec 08, 2022

Trigona (._locked) ransomware virus

Trigona is ransomware that encrypts files and appends the "._locked" extension to filenames. Also, it...

Threats Icon

Dec 08, 2022

Threat Actors Target Exposed Remote Desktop Protocol...

Threat actors were discovered targeting open Remote Desktop Protocol (RDP) ports with variants from a...

Threats Icon

Dec 07, 2022

Redigo Backdoor Malware Targets Redis Servers

The Redigo backdoor is written in the Go programming language and targets Redis servers vulnerable...

Threats Icon

Dec 06, 2022

DuckLogs MaaS (Malware-as-a-Service) Provides Sophisticated Features

DuckLogs is MaaS (Malware-as-a-Service) advertised on cybercrime forums with a range of features including remote...

Threats Icon

Dec 05, 2022

WannaRen Returns As Life Ransomware

WannaRen ransomware appeared on the threat landscape in 2020 and reemerged in 2022 as Life...

Threats Icon

Dec 04, 2022

Alert (AA22-335A) Cuba Ransomware

The Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) are...

Threats Icon

Dec 01, 2022

UNC4191 Threat Group Targets Entities In The...

The UNC4191 threat group was discovered targeting entities in the Philippines with custom malware and...

Threats Icon

Nov 30, 2022

Emotet Leads To Quantum Ransomware Infection

Threat actors were observed using Emotet to gain access to the victim's network and deploy...

Threats Icon

Nov 29, 2022

RansomExx Upgrades to Rust

IBM Security X-Force Threat Researchers have discovered a new variant of the RansomExx ransomware that...

Threats Icon

Nov 29, 2022

Ransomware Roundup: Cryptonite Ransomware

FortiGuard Labs has reported on Cryptonite ransomware, which was found to target Microsoft Windows machines...

Threats Icon

Nov 28, 2022

Operation Typhoon: The Cyber Sea Lotus Coveting...

Cyber espionage actors, now designated by FireEye as APT32 (OceanLotus Group), are carrying out intrusions...

Threats Icon

Nov 27, 2022

IL-Cert Alert – Active phishing campaign in...

There is a new phishing campaign in Israel. The malware relies upon user execution. The...

Threats Icon

Nov 27, 2022

Emotets Vacation Is Over: No Rest For...

Emotet started as a banking Trojan in spreading via spam campaigns by imitating financial statements,...

Threats Icon

Nov 24, 2022

Aurora: A Rising Stealer Flying Under The...

Aurora is a multipurpose botnet with data collection, information stealer, downloading, and remote access Trojan...

Threats Icon

Nov 23, 2022

Analysis Of The ViperSoftX And VenomSoftX Information...

Torrents and software-sharing sites are being used to target victims across the globe with variants...