Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
26/07/2026, 03:58
General
- Target 55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe
- Size 772KB
- Sample260726-ejj83ayvcv
- SHA256 55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b
Malware Config
Extracted
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djvu
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http://zexeq.com/test1/get.php
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extension
.nerz
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offline_id
0vTA6MA1m5nzrdffOCJC7YmAa4Lp6YNN8lOJ4mt1
-
payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-vc50LyB2yb Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0722JOsie
Signatures
- Family: Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Detected Djvu ransomware 21 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of WriteProcessMemory 23 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe"C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe"C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\236748d6-af33-497d-a7f3-3751c36f7ce6" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe"C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe"C:\Users\Admin\AppData\Local\Temp\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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-
-
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C:\Users\Admin\AppData\Local\236748d6-af33-497d-a7f3-3751c36f7ce6\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exeC:\Users\Admin\AppData\Local\236748d6-af33-497d-a7f3-3751c36f7ce6\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\236748d6-af33-497d-a7f3-3751c36f7ce6\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exeC:\Users\Admin\AppData\Local\236748d6-af33-497d-a7f3-3751c36f7ce6\55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
70825F0EABF2526E540CA0F7C268D189
8B2B9A00839EED1DFDCCC3BFC2F5DF12
B46811C17859FFB409CF0E904A4AA8F8
70825F0EABF2526E540CA0F7C268D189
8B2B9A00839EED1DFDCCC3BFC2F5DF12
B46811C17859FFB409CF0E904A4AA8F8
55d5702e6d30bfef8c4c036744bfe2330137d52dc32ee3399b1375614f815a9b.exe
bowsakkdestx.txt
build3.exe
memory/1876-1-0x0000000004960000-0x00000000049FF000-memory.dmp
memory/1876-2-0x0000000004A60000-0x0000000004B7B000-memory.dmp
memory/4088-75-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-74-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-72-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-73-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-62-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-49-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-70-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-69-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4088-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4112-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4112-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4112-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4112-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4112-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4480-58-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4480-55-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4480-53-0x0000000000400000-0x0000000000537000-memory.dmp