juko | d974ef0649a3a4693109fc306f93ad27e9d4f0e172f75be31df2ddcc6de3007b

General

Target
2026-06-27_cc298d2094a80c0ee66bde83d4f5864a_elex_wannacry.exe
Size 32KB
Sample260629-db43tsbx2t
SHA256 d974ef0649a3a4693109fc306f93ad27e9d4f0e172f75be31df2ddcc6de3007b
MD5 cc298d2094a80c0ee66bde83d4f5864a
SHA1 3cb74a6376fe66aec574ed09d7f1a49dd443f88f
SHA512 e8ccc84a6a92017d38be883225fa6992871a9046aeed4d70654958193cf6321b19ea36a488bceb7cb4f6d471a31e056475a42ce454cd2f5d0a7ed797c22134c0
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHlf:OLsF2Kerc64sTiX2IV0Dpmf
TLSH
T19AE2192B2AA17052C59220B0F9591F34C43D5DB50F6BB062F74D7A6928B2D63CF71ACE
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 2 IoCs

resource	yara_rule
behavioral2/files/0x000a000000019cb2-4.dat	family_juko
behavioral2/files/0x000f00000001c552-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5404	WINWORD.exe
5248	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-1-5-21-4118910392-3846778420-3545080915-1000\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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-27_cc298d2094a80c0ee66bde83d4f5864a_elex_wannacry.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
1440	cmd.exe
1620	PING.EXE
3240	PING.EXE
2352	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1620	PING.EXE
3240	PING.EXE
2352	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 5404	5108	2026-06-27_cc298d2094a80c0ee66bde83d4f5864a_elex_wannacry.exe	89
PID 5404 wrote to memory of 1440	5404	WINWORD.exe	90
PID 1440 wrote to memory of 1620	1440	cmd.exe	92
PID 1440 wrote to memory of 3240	1440	cmd.exe	93
PID 1440 wrote to memory of 2352	1440	cmd.exe	94
PID 1440 wrote to memory of 5248	1440	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-06-27_cc298d2094a80c0ee66bde83d4f5864a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-27_cc298d2094a80c0ee66bde83d4f5864a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5108
- 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:5404
- - 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\000075D5" 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:1440
  - - 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:1620
  - - 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:3240
  - - 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:2352
  - - 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:5248

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

000075D5

Path C:\Users\Admin\AppData\Roaming\Mozilla\000075D5
Size 32KB
SHA256 0529bcd5e5e5c8414bd96eebe83537515408862650cc2ef1f42b03b8e724adb2
MD5 3a970f5180ab9631f37b91ec73fec42f
SHA1 0f6d905a99d95ea646200e377790fdec9e6472d5
SHA512 fcd473b0f1f85371548afce85185d0b44f17806dfb76b9ec33e58ca1b53bff3affdfed86fded6c6d38a01fad8c3adde8b512721e686ae51e31afe83afead8cdf
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHly:OLsF2Kerc64sTiX2IV0Dpmy
TLSH
T1A3E2192B2AA17052C59220B0F9591F34C43D5DB50F6BB062F74D7A6928B2D63CF71ACE
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 d974ef0649a3a4693109fc306f93ad27e9d4f0e172f75be31df2ddcc6de3007b
MD5 cc298d2094a80c0ee66bde83d4f5864a
SHA1 3cb74a6376fe66aec574ed09d7f1a49dd443f88f
SHA512 e8ccc84a6a92017d38be883225fa6992871a9046aeed4d70654958193cf6321b19ea36a488bceb7cb4f6d471a31e056475a42ce454cd2f5d0a7ed797c22134c0
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHlf:OLsF2Kerc64sTiX2IV0Dpmf
TLSH
T19AE2192B2AA17052C59220B0F9591F34C43D5DB50F6BB062F74D7A6928B2D63CF71ACE
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