'Doctor@freelinuxmail.org' Ransomware
Threat Scorecard
EnigmaSoft Threat Scorecard
EnigmaSoft Threat Scorecards are assessment reports for different malware threats which have been collected and analyzed by our research team. EnigmaSoft Threat Scorecards evaluate and rank threats using several metrics including real-world and potential risk factors, trends, frequency, prevalence, and persistence. EnigmaSoft Threat Scorecards are updated regularly based on our research data and metrics and are useful for a wide range of computer users, from end users seeking solutions to remove malware from their systems to security experts analyzing threats.
EnigmaSoft Threat Scorecards display a variety of useful information, including:
Popularity Rank: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Popularity Rank: | 23,022 |
| Threat Level: | 20 % (Normal) |
| Infected Computers: | 277 |
| First Seen: | January 27, 2016 |
| Last Seen: | December 10, 2025 |
| OS(es) Affected: | Windows |
A ransomware infection referred to as the 'Doctor@freelinuxmail.org' Ransomware has been causing problems to many computer users. This ransomware Trojan instructs computer users to contact its email address to pay a ransom and receive a decryption key. Like most ransomware encryption Trojans, the 'Doctor@freelinuxmail.org' Ransomware encrypts the victim's files, essentially taking them hostage and then demanding the payment of a ransom. The main danger involving the 'Doctor@freelinuxmail.org' Ransomware and similar threats is that these infections take over the victim's computer and, even if removed, the files will remain encrypted. This has resulted in a brand of threat attacks that are particularly difficult to recover from. If your machine is infected with the 'Doctor@freelinuxmail.org' Ransomware, it will be necessary to restore the encrypted files as well as remove this threat.
The Harm Caused by Encryption Trojans such as the 'Doctor@freelinuxmail.org' Ransomware
The 'Doctor@freelinuxmail.org' Ransomware is designed to infect most computers on the Windows operating system. The 'Doctor@freelinuxmail.org' Ransomware may be delivered using corrupted email attachments. Computer users also can expect Trojans like the 'Doctor@freelinuxmail.org' Ransomware to be delivered using common threat delivery methods like attack websites and fake files on peer-to-peer sharing networks. The 'Doctor@freelinuxmail.org' Ransomware uses AES encryption to take over the victim's computer and encrypt the victim's files. The 'Doctor@freelinuxmail.org' Ransomware generates revenue by demanding that victims pay to restore their files. These kinds of scams have increased in number in recent times partly because of the rise of RaaS, or Ransomware as a Service. RaaS providers let clients customize their ransomware programs to their specific needs, and will even handle ransom collection and track the number and location of the infections, taking a percentage of the ransoms as a payment.
The 'Doctor@freelinuxmail.org' Ransomware Infection Method
Most ransomware Trojans carry out the same basic attack. The 'Doctor@freelinuxmail.org' Ransomware and its many variants may carry out the following steps as part of their infection method:
- The 'Doctor@freelinuxmail.org' Ransomware may first enter a computer through a corrupted email attachments or another, similar distribution method.
- Once the 'Doctor@freelinuxmail.org' Ransomware has been executed, it establishes a connection to its Command and Control server, receiving instructions and relaying the encryption information. Since the decryption key is not present on the 'Doctor@freelinuxmail.org' Ransomware itself, it becomes impossible for PC security researchers to recover the encrypted files.
- The 'Doctor@freelinuxmail.org' Ransomware scans the victim's hard drives, looking for specific file types. This encryption Trojan will look for media files, pictures, or documents, and the 'Doctor@freelinuxmail.org' Ransomware will encrypt all files except those required by the operating system to continue functioning.
- The 'Doctor@freelinuxmail.org' Ransomware drops text files, changes the files' names, and asks the victim to contact the 'Doctor@freelinuxmail.org' email address.
- Computer users that contact this email address will receive instructions for payment. Computer users may be allowed to decrypt one small file for free, as proof that the con artists do have the decryption key.
The 'Doctor@freelinuxmail.org' Ransomware takes the victims' computer hostage, preventing them from using their machines as normal. Malware researchers strongly advise computer users to protect their machines with the help of a reliable, fully updated anti-malware program and back up all their files to an external memory device or on the cloud. This way, if the 'Doctor@freelinuxmail.org' Ransomware attacks your computer, you can recover by wiping your hard drives and restoring the encrypted files from the backup. PC security researchers advise against paying the 'Doctor@freelinuxmail.org' Ransomware's ransom. Allowing fraudsters to profit from these attacks is only an encouragement, besides allowing them to continue funding these kinds of hoaxes and preying on additional computer users. There is also no guarantee that the people responsible for the 'Doctor@freelinuxmail.org' Ransomware infection will follow through on their promise of delivering the decryption key after the ransom payment has been made.
Analysis Report
General information
| Family Name: | Adware.ConvertAd.I |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
5b539df286673ba5bb58532f931bf06d
SHA1:
42c7e82b29f700475c4c6f34d2b3e2bf6d332e97
File Size:
1.10 MB, 1097696 bytes
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MD5:
2262169d7cae65f303ce3867145becea
SHA1:
e47aa9532b38f29ab4457dda1f214b2a6d5a3665
SHA256:
5E5479423E3664EA2F3C46008D6B46345FF09346E846527D905568332D1E90A7
File Size:
204.80 KB, 204800 bytes
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MD5:
fe2e2af8ede39b72efb26643a510ac16
SHA1:
cf300b86fb04940b3e7a543597b566fee22d7bed
SHA256:
7CF897D8DAFD93D707AE7EF49565EA17E2419F6EBC896BF1B582541984AFAA6C
File Size:
195.07 KB, 195072 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have exports table
- File doesn't have relocations information
- File doesn't have resources
- File doesn't have security information
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is Native application (NOT .NET application)
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- File is not packed
- IMAGE_FILE_DLL is not set inside PE header (Executable)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
File Traits
- HighEntropy
- No Version Info
- x86
Block Information
Block Information
During analysis, EnigmaSoft breaks file samples into logical blocks for classification and comparison with other samples. Blocks can be used to generate malware detection rules and to group file samples into families based on shared source code, functionality and other distinguishing attributes and characteristics. This section lists a summary of this block data, as well as its classification by EnigmaSoft. A visual representation of the block data is also displayed, where available.| Total Blocks: | 1,009 |
|---|---|
| Potentially Malicious Blocks: | 83 |
| Whitelisted Blocks: | 894 |
| Unknown Blocks: | 32 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Files Modified
Files Modified
This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.| File | Attributes |
|---|---|
| c:\users\user\appdata\local\temp\nsp598b.tmp | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete |
| c:\users\user\appdata\local\temp\nsq59db.tmp\system.dll | Generic Write,Read Attributes |
Windows API Usage
Windows API Usage
This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.| Category | API |
|---|---|
| Service Control |
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