juko | 8189c35126c8726adf843c2850c0c8fbac8c03ea0df1677fc4e07bcd69d318ce

General

Target
2026-10-08_0075a178d14fbcdb5d1edddb832c271f_elex_wannacry.exe
Size 32KB
Sample261009-2fpqpsft8x
SHA256 8189c35126c8726adf843c2850c0c8fbac8c03ea0df1677fc4e07bcd69d318ce
MD5 0075a178d14fbcdb5d1edddb832c271f
SHA1 863911278d10f2564c31a4c9cd9bd2826e432128
SHA512 ef7d4d34c444e03506573dbbe88c95913ec5f3c7cdcc1f84f795f882b4e86b6896040dd8268c1d0ef52f4364d186e0eae0e472e9dc575af00af5549a18d666f7
SSDEEP 768:AUZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpR:AYLsF2Kerc64sTiX2IV0DhuR
TLSH
T1ACE2293B2A617052C59220B0F9991F348D7D4CB7116BB066FB417A6928B2D63CF70DDE
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/0x00020000000220b9-3.dat	family_juko
behavioral1/files/0x00150000000242d9-12.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-1-5-21-895009113-1202185046-1686627690-1000\Control Panel\International\Geo\Nation	2026-10-08_0075a178d14fbcdb5d1edddb832c271f_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-895009113-1202185046-1686627690-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4020	WINWORD.exe
3116	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-1-5-21-895009113-1202185046-1686627690-1000\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
2968	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\Domain	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	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	PING.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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-08_0075a178d14fbcdb5d1edddb832c271f_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

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
4732	PING.EXE
2968	cmd.exe
3528	PING.EXE
1228	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3528	PING.EXE
1228	PING.EXE
4732	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 4020	2064	2026-10-08_0075a178d14fbcdb5d1edddb832c271f_elex_wannacry.exe	88
PID 4020 wrote to memory of 2968	4020	WINWORD.exe	89
PID 2968 wrote to memory of 3528	2968	cmd.exe	91
PID 2968 wrote to memory of 1228	2968	cmd.exe	94
PID 2968 wrote to memory of 4732	2968	cmd.exe	97
PID 2968 wrote to memory of 3116	2968	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\2026-10-08_0075a178d14fbcdb5d1edddb832c271f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-08_0075a178d14fbcdb5d1edddb832c271f_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2064
- 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:4020
- - 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\000054BE" 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:2968
  - - 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:3528
  - - 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:1228
  - - 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:4732
  - - 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:3116

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

Replay Monitor

Loading Replay Monitor...

Downloads

000054BE

Path C:\Users\Admin\AppData\Roaming\Mozilla\000054BE
Size 32KB
SHA256 05be4f66347111f96a0c045368ab8fcbd7a6793f400a50b5a2d9031b712190bd
MD5 bc2a4d17b135a81c927eb5469d4e0b88
SHA1 33d360e49f103632df1bbdf00488b23e966a0210
SHA512 07ec428080dac50cc6fa8063d87f2fbfa53a9e9be1b459efa8b341b2057aa9518fd007c18c954ce00321386c1f9ccb8c3416f570d6fb3132daa55335ba62825d
SSDEEP 768:AUZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpT:AYLsF2Kerc64sTiX2IV0DhuT
TLSH
T1E0E2293B2AA17052C59220B0F9991F348D7D4CB7116BB066FB417A6928B2D63CF70DDE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 8189c35126c8726adf843c2850c0c8fbac8c03ea0df1677fc4e07bcd69d318ce
MD5 0075a178d14fbcdb5d1edddb832c271f
SHA1 863911278d10f2564c31a4c9cd9bd2826e432128
SHA512 ef7d4d34c444e03506573dbbe88c95913ec5f3c7cdcc1f84f795f882b4e86b6896040dd8268c1d0ef52f4364d186e0eae0e472e9dc575af00af5549a18d666f7
SSDEEP 768:AUZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpR:AYLsF2Kerc64sTiX2IV0DhuR
TLSH
T1ACE2293B2A617052C59220B0F9991F348D7D4CB7116BB066FB417A6928B2D63CF70DDE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads