juko | 9299fe060a155efeeb763172ba1846e528e287683b4c22dcfbc420d16a5e5530

General

Target
2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe
Size 88KB
Sample260416-c3scnset7q
SHA256 9299fe060a155efeeb763172ba1846e528e287683b4c22dcfbc420d16a5e5530
MD5 bdd09e37fa7449bb3645dc1a2b933920
SHA1 f689a9365a46ce44ff032a2df270f1360ae3a984
SHA512 64c5204da55e69fff5b36ed4aebff110492616d76d4ccae7e08ea66ae5e2ccb4bde8737c609009bb108efa00ba792373b41e6b3aaa830917daea29dd3000328b
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsX:zLy2Kerc64CiGImHc/28wzCBlycJWeeg
TLSH
T1D2933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery juko persistence trojan

Malware Config

Signatures

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

Detects Juko 7 IoCs

resource	yara_rule
behavioral1/memory/3676-0-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/files/0x000a0000000234a0-5.dat	family_juko
behavioral1/memory/3676-12-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/memory/5064-14-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/files/0x00080000000242d9-15.dat	family_juko
behavioral1/memory/2412-17-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/memory/2412-26-0x0000000000400000-0x000000000042A000-memory.dmp	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-1-5-21-2714754311-527593155-1440850301-1000\Control Panel\International\Geo\Nation	2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2714754311-527593155-1440850301-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
5064	WINWORD.exe
2412	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-1-5-21-2714754311-527593155-1440850301-1000\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

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	2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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
2632	cmd.exe
4380	PING.EXE
2328	PING.EXE
1804	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4380	PING.EXE
2328	PING.EXE
1804	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 5064	3676	2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe	84
PID 5064 wrote to memory of 2632	5064	WINWORD.exe	85
PID 2632 wrote to memory of 4380	2632	cmd.exe	87
PID 2632 wrote to memory of 2328	2632	cmd.exe	88
PID 2632 wrote to memory of 1804	2632	cmd.exe	89
PID 2632 wrote to memory of 2412	2632	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_bdd09e37fa7449bb3645dc1a2b933920_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3676
- 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:5064
- - 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\00001D75" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:2632
  - - 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:4380
  - - 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:2328
  - - 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:1804
  - - 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
      System Location Discovery: System Language Discovery
      PID:2412

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00001D75

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001D75
Size 88KB
SHA256 90c5dcb4bd3c1672c2da193f0808ec3871d4ec171a7ffd40b98fe287798aabb3
MD5 359f76804a07659e61f8e00a1d61a4f1
SHA1 f8e06efb5bee9fa43f4625e6ac207e3e9a66b184
SHA512 38287195e58e65545be65e6b47a2033eb6424253530800bd18d85e34e7ec06ca566e4914f3d08e8afd4dfb609cbda15461ac353f27413085cbeb6aae21f795f9
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsT:zLy2Kerc64CiGImHc/28wzCBlycJWeeg
TLSH
T1D3933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 9299fe060a155efeeb763172ba1846e528e287683b4c22dcfbc420d16a5e5530
MD5 bdd09e37fa7449bb3645dc1a2b933920
SHA1 f689a9365a46ce44ff032a2df270f1360ae3a984
SHA512 64c5204da55e69fff5b36ed4aebff110492616d76d4ccae7e08ea66ae5e2ccb4bde8737c609009bb108efa00ba792373b41e6b3aaa830917daea29dd3000328b
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsX:zLy2Kerc64CiGImHc/28wzCBlycJWeeg
TLSH
T1D2933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2412-17-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/2412-18-0x0000000002D10000-0x0000000002D29000-memory.dmp

Download

memory/2412-26-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/3676-0-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/3676-12-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/5064-14-0x0000000000400000-0x000000000042A000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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