Ransomware Research
Clop Ransomware
Clop is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Clop, CIop, CIop2, CL0P, Clop Doxware.
Quick Facts
- Ransomware Family
- Clop
- First Seen
- February 1, 2019
- Known Aliases
- ClopCIopCIop2CL0PClop Doxware
How Clop Ransomware Works
Targeted Files
Tested 70f42cc9fca43dc1fdfa584b37ecbc81761fb996cb358b6f569d734fa8cce4e3 as working sample Some windows binaries (46cd508b7e77bb2c1d47f7fef0042a13c516f8163f9373ef9dfac180131c65ed) would work only with -> sc.exe create ChangerWifi binPath= "d:\chrome.exe" c7e3293a6be881a93c66d04b085c69c56ec29ba20a81dd8ce8dac77af2c2cb30 -> service name -> W7CheckUpdate 61ac59b8110ff8bee625d7620e4e8946256fe7ad4554d56b32a106219348f767 -> service name -> BootServicingSecurity https://blog.cyble.com/2023/04/03/cl0p-ransomware-active-threat-plaguing-businesses-worldwide/ https://www.joesandbox.com/analysis/894996/0/html https://www.sentinelone.com/labs/cl0p-ransomware-targets-linux-systems-with-flawed-encryption-decryptor-available/ https://github.com/SentineLabs/Cl0p-ELF-Decryptor
File Encryption Patterns
Clop modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..Clop
..Cl0p
..CIop
..Cllp
..C_L_O_P
..C_I_0P
Ransom Note and Payment Demands
After encrypting files, Clop displays ransom notes demanding payment for file recovery:
ClopReadMe.txt
Ransom message:
notes/ClopReadMe.txt
Note locations:
EveryFolder
CIopReadMe.txt
Ransom message:
notes/CIopReadMe.txt
Note locations:
EveryFolder
Cl0pReadMe.txt
!!!_READ_!!!.RTF
README_C_I_0P.TXT
Ransom message:
notes/README_C_I_0P.TXT
!_READ_ME.RTF
Ransom message:
notes/!_READ_ME.RTF
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with Clop ransomware:
unpacked.exe
clop
sample.bin
file.exe
gmontraff.exe
myfile.exe
swaqp.exe
DTQZ52M5.exe
DBTRUA4Q.exe
SB1LGRPI.exe
YWFJ84M7.exe
Trojan.Ransom.Clop.exe
clop.bin
oleObject1.bin
Clop.exe
2019-03-01 Klop.exe
KlopRansom.exe
SCN0tification.exe
SoftwareProtection.exe.dis
SysvolYSysZLogonQ.exe
Elastio Can Help You
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About This Analysis
This Clop ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Clop.
Last updated: July 30, 2025