juko | ecc3329dc9e4d3df919ffb829616c43035b5629b51d8f5d462d638381aab091c

General

Target
2026-04-24_9c9374c69bd29af188c22bc8c3720f9b_elex_wannacry.exe
Size 138KB
Sample260424-q643jacw2x
SHA256 ecc3329dc9e4d3df919ffb829616c43035b5629b51d8f5d462d638381aab091c
MD5 9c9374c69bd29af188c22bc8c3720f9b
SHA1 5bfb88a36882dcd84cd683c18b7ec28ba574cb5a
SHA512 578885d689653dec08d1a813723c8d32193399aeec1ea1e170bccb45a36031b2b927ff2cfca79fec2ae971aa1e1e61129076831b70620dcf29b0439939c9c472
SSDEEP 3072:sLy2Kerc64CiGIm8aRgqG91AJ0qVIdWkDnRqkXCMFJBrXWWestyFG7G:sLy2Kwc64YIZ+C2JisNM5XWWe0Ly
TLSH
T13FD33A1563FA461AE5FF06BCA930103F0576BF221917E59F394831FD0B79781CAA23A6
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 8 IoCs

resource	yara_rule
behavioral2/memory/1404-0-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/files/0x0017000000025a2d-5.dat	family_juko
behavioral2/memory/1404-13-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/5168-12-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/5168-15-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/files/0x002100000002b29f-16.dat	family_juko
behavioral2/memory/648-18-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko
behavioral2/memory/648-19-0x0000000000400000-0x0000000000436000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5168	WINWORD.exe
648	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-1-5-21-3847269522-1618051987-1942096715-1000\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	2026-04-24_9c9374c69bd29af188c22bc8c3720f9b_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
3016	PING.EXE
2852	PING.EXE
4880	PING.EXE
1140	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3016	PING.EXE
2852	PING.EXE
4880	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 5168	1404	2026-04-24_9c9374c69bd29af188c22bc8c3720f9b_elex_wannacry.exe	80
PID 5168 wrote to memory of 1140	5168	WINWORD.exe	81
PID 1140 wrote to memory of 3016	1140	cmd.exe	83
PID 1140 wrote to memory of 2852	1140	cmd.exe	84
PID 1140 wrote to memory of 4880	1140	cmd.exe	85
PID 1140 wrote to memory of 648	1140	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-24_9c9374c69bd29af188c22bc8c3720f9b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-24_9c9374c69bd29af188c22bc8c3720f9b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1404
- 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:5168
- - 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\00001879" 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:1140
  - - 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:3016
  - - 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:2852
  - - 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:4880
  - - 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:648

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

00001879

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001879
Size 138KB
SHA256 10c8a690b4d859adcc17c0a46ca159c1420308debeb6d8af7a5c744ac4e713e7
MD5 c7339e03d0a5cbd4f5afbbd7049ed628
SHA1 899d8aa69d1ddbd938d089f66e6dc2e6637f14c0
SHA512 7e6ad42fd2dfcf27b7275b895996adb7059894841f206b89f542ec0913bcb6faf05e36e454e4f40401f1234811ea637b0d90a5bbdd3a361c41c26ca371e890d5
SSDEEP 3072:sLy2Kerc64CiGIm8aRgqG91AJ0qVIdWkDnRqkXCMFJBrXWWestyFG7z:sLy2Kwc64YIZ+C2JisNM5XWWe0Ln
TLSH
T161D33A1563FA461AE5FF06BCA930103F0576BF221917E59F394831FD0B79781CAA23A6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 138KB
SHA256 ecc3329dc9e4d3df919ffb829616c43035b5629b51d8f5d462d638381aab091c
MD5 9c9374c69bd29af188c22bc8c3720f9b
SHA1 5bfb88a36882dcd84cd683c18b7ec28ba574cb5a
SHA512 578885d689653dec08d1a813723c8d32193399aeec1ea1e170bccb45a36031b2b927ff2cfca79fec2ae971aa1e1e61129076831b70620dcf29b0439939c9c472
SSDEEP 3072:sLy2Kerc64CiGIm8aRgqG91AJ0qVIdWkDnRqkXCMFJBrXWWestyFG7G:sLy2Kwc64YIZ+C2JisNM5XWWe0Ly
TLSH
T13FD33A1563FA461AE5FF06BCA930103F0576BF221917E59F394831FD0B79781CAA23A6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/648-18-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/648-19-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/1404-0-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/1404-13-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/5168-12-0x0000000000400000-0x0000000000436000-memory.dmp

Download

memory/5168-15-0x0000000000400000-0x0000000000436000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads