juko | 253d2efedbea0ecaf12b1d34a8dfd8c9e2ec58c4bede04836190c6839a060012

General

Target
2026-07-14_48cadb598a78541e57dda16d913c8b0b_elex_wannacry.exe
Size 39KB
Sample260714-ndeaasbt9l
SHA256 253d2efedbea0ecaf12b1d34a8dfd8c9e2ec58c4bede04836190c6839a060012
MD5 48cadb598a78541e57dda16d913c8b0b
SHA1 43b51f014e2100309200e22267b9172df6dfd3e5
SHA512 3a77c65a376d2f6fb2b227c136d19fc99ff02fb58bea4f9c79835939b5f0961a2046a77c1605ebf5700c4923ed6e1650af21809e5d63a00daf62e78cd3392257
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB3:aLsF2Kerc64sTiX2IV0DVyIGFM
TLSH
T115036B1B2964B062C69611B0F8696F34C03DADB4052BF052F7447B992CB6DA3DF71ACE
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/2012-0-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x0009000000019ce0-5.dat	family_juko
behavioral2/memory/2012-10-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/2396-12-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x000e00000001c4fe-13.dat	family_juko
behavioral2/memory/4852-15-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/4852-16-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2396	WINWORD.exe
4852	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-1-5-21-552508041-2681165170-3229858294-1000\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	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	2026-07-14_48cadb598a78541e57dda16d913c8b0b_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
2328	cmd.exe
3212	PING.EXE
3612	PING.EXE
1476	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1476	PING.EXE
3212	PING.EXE
3612	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 2396	2012	2026-07-14_48cadb598a78541e57dda16d913c8b0b_elex_wannacry.exe	87
PID 2396 wrote to memory of 2328	2396	WINWORD.exe	88
PID 2328 wrote to memory of 3212	2328	cmd.exe	90
PID 2328 wrote to memory of 3612	2328	cmd.exe	91
PID 2328 wrote to memory of 1476	2328	cmd.exe	92
PID 2328 wrote to memory of 4852	2328	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-14_48cadb598a78541e57dda16d913c8b0b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-14_48cadb598a78541e57dda16d913c8b0b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2012
- 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:2396
- - 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\0000132E" 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: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:3212
  - - 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:3612
  - - 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:1476
  - - 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:4852

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

0000132E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000132E
Size 39KB
SHA256 aed19e327279891767a149a2f08f6304d6e5ab74473036236c258153a0dc5af9
MD5 ea1fd8a1b2d41c9d35ecf1df30107937
SHA1 18f439c8a627f78de23bb5a68199a85f7dcf6b22
SHA512 9c0117bb764d3585fc7bf00af9b57587b07a8fb3667877b7fa3ed36443f1a97c9548e4850d31dfd4a80f2e63ff3ef2a750270c96d169a0c8c0e0b29b3e726bbc
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB7:aLsF2Kerc64sTiX2IV0DVyIGF0
TLSH
T17D036B1B2964B062C69611B0F8696F34C03DADB4052BF052F7447B992CB6DA3DF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 39KB
SHA256 253d2efedbea0ecaf12b1d34a8dfd8c9e2ec58c4bede04836190c6839a060012
MD5 48cadb598a78541e57dda16d913c8b0b
SHA1 43b51f014e2100309200e22267b9172df6dfd3e5
SHA512 3a77c65a376d2f6fb2b227c136d19fc99ff02fb58bea4f9c79835939b5f0961a2046a77c1605ebf5700c4923ed6e1650af21809e5d63a00daf62e78cd3392257
SSDEEP 768:uZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqGNPWQHV6+UGNSyxSB3:aLsF2Kerc64sTiX2IV0DVyIGFM
TLSH
T115036B1B2964B062C69611B0F8696F34C03DADB4052BF052F7447B992CB6DA3DF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2012-0-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/2012-10-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/2396-12-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4852-15-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4852-16-0x0000000000400000-0x000000000041D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads