Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
03/05/2026, 16:17
General
- Target 2026-05-03_fa063f567e0d457bd680eb7bd6783bc3_elex_wannacry.exe
- Size 57KB
- Sample260503-tree4sds8s
- SHA256 dcad621b6d27c88ee137a0603159d21bbd6c9bdfe96a42ba9c73d8d55b528cda
Malware Config
Signatures
- Family: Juko
Juko is a trojan written in C++.
- Detects Juko 7 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 1 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.
- System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs
Adversaries may check for Internet connectivity on compromised systems.
- Runs ping.exe 1 TTPs 3 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\2026-05-03_fa063f567e0d457bd680eb7bd6783bc3_elex_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2026-05-03_fa063f567e0d457bd680eb7bd6783bc3_elex_wannacry.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r2⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 2&del "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"&ping 127.0.0.1 -n 2&rename "C:\Users\Admin\AppData\Roaming\Mozilla\00004BDC" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r3⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 24⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
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C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 24⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
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C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 24⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
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C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r4⤵
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v16
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
Loading Replay Monitor...
Downloads
00004BDC
WINWORD.exe
memory/1056-19-0x0000000000400000-0x0000000000422000-memory.dmp
memory/1056-20-0x0000000000A60000-0x0000000000A85000-memory.dmp
memory/1056-28-0x0000000000400000-0x0000000000422000-memory.dmp
memory/2172-0-0x0000000000400000-0x0000000000422000-memory.dmp
memory/2172-13-0x0000000000400000-0x0000000000422000-memory.dmp
memory/2172-12-0x0000000000510000-0x0000000000535000-memory.dmp
memory/4036-15-0x0000000000540000-0x0000000000565000-memory.dmp
memory/4036-16-0x0000000000400000-0x0000000000422000-memory.dmp