juko | 907c6aef0fa26bb71b8b5ba4958f215b59eb73292afbffcae75b6b11b1dfc614

General

Target
2026-10-10_7922c20d918b7882d4b684c32186e3d9_elex_wannacry.exe
Size 64KB
Sample261011-mt7fcage52
SHA256 907c6aef0fa26bb71b8b5ba4958f215b59eb73292afbffcae75b6b11b1dfc614
MD5 7922c20d918b7882d4b684c32186e3d9
SHA1 2244827ddff9dd545ca09710c8cbb4d369d15d93
SHA512 d638f8b0e65d55ca9404a694bc33e3f193beef9da3eabfe56e97f9cc70def57a39c13df4c082555731067fdcd94541b6d2aea7454844d062c60d1010a24b133c
SSDEEP 1536:t2LsF2Kerc64sTiX2IV0DOlOy6vlvqxy2dnNJfXlNWbITDZ:t2Ly2Kerc64CiGImClOyqlvGdnNJfG8B
TLSH
T13D5338173BE554C2E1E606706DB68F78847BFC704A23D51AB780720E1C75E62DE31BAA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 2 IoCs

resource	yara_rule
behavioral1/files/0x000700000001e6cb-3.dat	family_juko
behavioral1/files/0x0004000000022aee-12.dat	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-939655444-3071939294-1401108526-1000\Control Panel\International\Geo\Nation	2026-10-10_7922c20d918b7882d4b684c32186e3d9_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-939655444-3071939294-1401108526-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
2272	WINWORD.exe
4652	WINWORD.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-939655444-3071939294-1401108526-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WINWORD = "C:\\Users\\Admin\\AppData\\Roaming\\Mozilla\\WINWORD.exe -r"	WINWORD.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5116	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-10_7922c20d918b7882d4b684c32186e3d9_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5116	cmd.exe
3316	PING.EXE
1944	PING.EXE
1844	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3316	PING.EXE
1944	PING.EXE
1844	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1420 wrote to memory of 2272	1420	2026-10-10_7922c20d918b7882d4b684c32186e3d9_elex_wannacry.exe	89
PID 2272 wrote to memory of 5116	2272	WINWORD.exe	90
PID 5116 wrote to memory of 3316	5116	cmd.exe	92
PID 5116 wrote to memory of 1944	5116	cmd.exe	95
PID 5116 wrote to memory of 1844	5116	cmd.exe	98
PID 5116 wrote to memory of 4652	5116	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\2026-10-10_7922c20d918b7882d4b684c32186e3d9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-10_7922c20d918b7882d4b684c32186e3d9_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1420
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2272
- - 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\0000616C" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5116
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:3316
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1944
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1844
  - - C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
      "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:4652

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

0000616C

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000616C
Size 64KB
SHA256 be56da425e8cb2bda3bd78f4e3c56d4b37681f75ee5f64a0e39d413ed750a610
MD5 cd6c7c3fa20b6e008f9b6fbab8f9b582
SHA1 4d76ebdd9158fb7006db2185a72255d8952e353a
SHA512 64fcf76455b42c81d86afdfecd620c6f7949df9ce8edd0936bbdc53cfaf76362d1eb8bb2bdd824c9b120a5ede64c538d2743a107df2798324da7e95eb991d11d
SSDEEP 1536:t2LsF2Kerc64sTiX2IV0DOlOy6vlvqxy2dnNJfXlNWbITD0:t2Ly2Kerc64CiGImClOyqlvGdnNJfG8s
TLSH
T15A5338173BE554C2E1E606706DB68F78847BFC704A23D51AB780720E1C75E62DE31BAA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 907c6aef0fa26bb71b8b5ba4958f215b59eb73292afbffcae75b6b11b1dfc614
MD5 7922c20d918b7882d4b684c32186e3d9
SHA1 2244827ddff9dd545ca09710c8cbb4d369d15d93
SHA512 d638f8b0e65d55ca9404a694bc33e3f193beef9da3eabfe56e97f9cc70def57a39c13df4c082555731067fdcd94541b6d2aea7454844d062c60d1010a24b133c
SSDEEP 1536:t2LsF2Kerc64sTiX2IV0DOlOy6vlvqxy2dnNJfXlNWbITDZ:t2Ly2Kerc64CiGImClOyqlvGdnNJfG8B
TLSH
T13D5338173BE554C2E1E606706DB68F78847BFC704A23D51AB780720E1C75E62DE31BAA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads