juko | 1722c17ae0dcd3fcd2ad087436bd44b2670fef180e1415040214e72702cf0735

General

Target
2026-04-23_4ab8a65469bf807ad2f72413dc383eb3_elex_wannacry.exe
Size 49KB
Sample260423-wpy3vaet61
SHA256 1722c17ae0dcd3fcd2ad087436bd44b2670fef180e1415040214e72702cf0735
MD5 4ab8a65469bf807ad2f72413dc383eb3
SHA1 dccd0ca109d7dd815228faf3841c9c1f1ae4d182
SHA512 0cd08ae11e822c3c220fd922c8921159a850164dc7f39cdfec057ac5ad0cd7c95adf6ced366ed5a1f6285c302e066106dea18093cdd62f078c271dc40d72b777
SSDEEP 1536:VLsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2D:VLy2Kerc64CiGImVu8p4kojWh2D
TLSH
T1E3334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
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
behavioral2/memory/5224-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001100000002ad90-5.dat	family_juko
behavioral2/memory/5224-12-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/4796-14-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001b00000002b39f-15.dat	family_juko
behavioral2/memory/2992-17-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/2992-18-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4796	WINWORD.exe
2992	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-1-5-21-2397528088-2630719772-1129911217-1000\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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-23_4ab8a65469bf807ad2f72413dc383eb3_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
4948	PING.EXE
5596	PING.EXE
4816	cmd.exe
5976	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5976	PING.EXE
4948	PING.EXE
5596	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5224 wrote to memory of 4796	5224	2026-04-23_4ab8a65469bf807ad2f72413dc383eb3_elex_wannacry.exe	79
PID 4796 wrote to memory of 4816	4796	WINWORD.exe	80
PID 4816 wrote to memory of 5976	4816	cmd.exe	82
PID 4816 wrote to memory of 4948	4816	cmd.exe	83
PID 4816 wrote to memory of 5596	4816	cmd.exe	84
PID 4816 wrote to memory of 2992	4816	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-04-23_4ab8a65469bf807ad2f72413dc383eb3_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-23_4ab8a65469bf807ad2f72413dc383eb3_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5224
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4796
- - 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\00006EE5" 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:4816
  - - 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:5976
  - - 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:4948
  - - 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:5596
  - - 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:2992

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

Remote System Discovery

1

T1018

System Information Discovery

1

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

00006EE5

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006EE5
Size 49KB
SHA256 e788bc1689c3aa72a3d16e8cd25a28410c8c9a1aa6c5ae962c06c2c4c6d5fc4e
MD5 1200f0b19a330f69fc90b2227a5bdd48
SHA1 4a0cd75e2c349c5233fd61d17febbb1dde6c18ce
SHA512 6b392a7f9e8e93b80cf49c3282e81ff7811db52bc6b8add0c214e5995f83b1c6dc25d97ee79cd55101a5f57635dd5e7632d9c80f2251211ef7373afc1232e3c8
SSDEEP 1536:VLsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2u:VLy2Kerc64CiGImVu8p4kojWh2u
TLSH
T192334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 1722c17ae0dcd3fcd2ad087436bd44b2670fef180e1415040214e72702cf0735
MD5 4ab8a65469bf807ad2f72413dc383eb3
SHA1 dccd0ca109d7dd815228faf3841c9c1f1ae4d182
SHA512 0cd08ae11e822c3c220fd922c8921159a850164dc7f39cdfec057ac5ad0cd7c95adf6ced366ed5a1f6285c302e066106dea18093cdd62f078c271dc40d72b777
SSDEEP 1536:VLsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h2D:VLy2Kerc64CiGImVu8p4kojWh2D
TLSH
T1E3334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2992-17-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/2992-18-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/4796-14-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5224-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/5224-12-0x0000000000400000-0x0000000000420000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads