Analysis
- max time kernel
149s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
24/08/2026, 03:45
General
- Target 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
- Size 729KB
- Sample260824-ea3daasflh
- SHA256 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1
Malware Config
Extracted
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djvu
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http://cajgtus.com/test1/get.php
-
extension
.watz
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offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
- payload_url
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ransomnote
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Signatures
- Family: Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Detected Djvu ransomware 22 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 4 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 1 TTPs 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 4 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 9 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 31 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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\461358a1-8670-4f64-8e03-5f881f8e3908" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
-
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C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4136 -s 5685⤵
- Program crash
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-
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C:\Users\Admin\AppData\Local\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exeC:\Users\Admin\AppData\Local\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exeC:\Users\Admin\AppData\Local\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe2⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"C:\Users\Admin\AppData\Local\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask3⤵
- 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\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"C:\Users\Admin\AppData\Local\461358a1-8670-4f64-8e03-5f881f8e3908\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4136 -ip 41361⤵
Network
MITRE ATT&CK Enterprise v16
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
Loading Replay Monitor...
Downloads
70825F0EABF2526E540CA0F7C268D189
8B2B9A00839EED1DFDCCC3BFC2F5DF12
B46811C17859FFB409CF0E904A4AA8F8
70825F0EABF2526E540CA0F7C268D189
8B2B9A00839EED1DFDCCC3BFC2F5DF12
B46811C17859FFB409CF0E904A4AA8F8
3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
memory/556-2-0x0000000002200000-0x000000000231B000-memory.dmp
memory/556-1-0x0000000002160000-0x00000000021F3000-memory.dmp
memory/3420-50-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-56-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-63-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-62-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-60-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-61-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-58-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-54-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-53-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-52-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-55-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4032-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4032-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4032-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4032-20-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4032-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4248-37-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/4248-33-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/4980-23-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/4980-29-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/5028-45-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5028-36-0x0000000000400000-0x0000000000537000-memory.dmp